Electronik Solution

dbx 166XL compressor is fault

2020-12-06T06:22:00.000-08:00

dbx 166XL compressor is faulty

Damage dbx cmpressor

1. when turned on all the led lights

2. All settings do not work

steps to fix :

1. Open the dbx box cover

2. check the input voltage to the circuit, here the voltage used is +15 volts, -15 volts

3. When the measurement is done, the voltage drops and the -15 volt regulator ic becomes hot.

4. the next step is breaking the current leading to the circuit after the powersuplay to find out

damage to the power supply or not. after disconnecting the current, turn it on

dbx and check the power supply output again. after measuring the voltage that comes out

normal.

5. then check the main circuit in the voltage supply section that makes the circuit

the voltage drop.

6. After checking there is a short capacitor in the -15 volt section of the circuit.

7. replace the short capacitor or it can be removed, but better to replace.

Capasitor short

8. Damage can be seen as shown in the picture.

Replace capasitor marked

POWER AMPLIFIER TOA ZA 2120 MATI TOTAL

2019-11-27T19:06:00.002-08:00

POWER AMPLIFIER TOA ZA2120 MATI TOTAL

KERUSAKAN :
-indikator power mati
- tidak keluar suara pada output

LANGKAH LANGKAH PERBAIKAN
1. Pertama cek bagian Fuse jika putus langsung ganti
2. cek fuse bagian output,ini bisanya putus
3. cek Transistor FINAL biasanya ini yang menyebabkan Fusu putus
4. CekTransistor final tersebut jika menemukan kondisi short lansung ganti
5. pastikan semua komponen yang rusak diganti
6. setelah semua dirasa sudah fik langsung saja di tes apakah sudah berfungsi normal atau tidak
7. jika sudah normal kembali siap digunakan

TV Goldstar was struck by lightning

2017-08-29T19:46:00.002-07:00




















Coming Goldstar TV consumers die totally because there is lightning strikes in the tree near the house. after knowing the cause of the estimated part of the damaged power supply. tv i open and see no burned components and fuse break up.First check the power supplay.Tv turn on the output voltage no power supply. check the circuit and check the voltage after the diode turns out the voltage, traced into the input component is there but ouput STR no voltage, before replace STR check all components Power supply. all components baik.langkah next change STR. after change STR Tv I turn it on.tv still do not want to live just Led indicator flashed dead. Must have protec any components that die again pasti.cek voltage B + and others it drops, Protec circuit I loose, then try turn on the tv, byarr .... lights that I plug in B + flame. (Bolam to check output voltage, if the flame means already indicate there is a voltage out) check the normal B + voltage but the screen is not flashing just dark. check the line ABI to IC, check the components one by one finally find the 5.1 v leaked zener diode. then I replace the Diode. plug Protect line directly try hidupin TV ...., byaar ... finally can plasticity of picture. while checking all 




voltages, after all normal voltage, plug the 



TV cover and hire deh hehehehhe .....

.Based personal experience.

TV akari 14" raster disability

2017-08-29T19:17:00.002-07:00

Akari TV 14 "with the symptoms do not go out the image / raster disability, OSD does not come out but the sound is normal. After du trace of damage to the Elko 22uF / 250 volts which is near the flyback. After replacing the capacitor directly normal picture.

Looks like in the picture

PCB Dril Speed Controller With IC 555

2016-02-23T08:25:00.001-08:00

PCB Dril Speed Controller With 555

(By : T.K. Hareendran )

Described here is a simple, inexpensive and useful circuit for electronics hobbyists. The circuit is nothing but a PCB drill speed controller, which can be used to control the speed of any 12VDC small pcb drilling units. Such portable units are now widely available, and even a hobbyist can make it without too much difficulty.

In this circuit, the renowned timer chip LM555 (IC1) is used as a PWM circuit. The whole circuit can be powered from a standard 12VDC supply, capable of sourcing ample current to the PCB drill motor. As you may noted, power supply for the PWM circuit is down-converted and regulated with the help of a 3-pin fixed regulator chip LM7805 (IC2). This will improve the circuit stability. Precision 50K trimpot P1 is the variable drill speed controller. Finally, a logic-level power Mosfet IRL 530N (T1) is used as the output drive element. This IRL530N mosfet (available in TO-220 package) can handle current upto 27A! Fast switching and Low on-resistance – RDS (on) – are other attracting features. IRL 530N is universally preferred for all commercial-industrial applications at power dissipation levels to approximately 50 watts.
Drill Speed Controller Notes

PWM (Pulse Width Modulation) is an efficient way to vary the speed and power of electric DC motors. The described circuit can be used to vary the speed of small electric PCB drill.The circuits can quite easily be built on a standard prototyping board. The power component (IRL510N) must be connected to the power rails and the drill motor with quite thick wires and cables.
As used here, a Power MOSFET motor driver is better than the traditional driver because it is working at a higher switch frequency, and this also avoids the unnecessary voltage drop and power loss
Electrically a DC motor can be viewed as a series RL network with a voltage generator. The generator represents the back electromotive force (BEMF) generated by the motor’s rotation and which opposes the electromotive force of the supply. Diode D3 (1N4007) is added to protect the electronics from BEMF. Diode “MBR 1645” is a better alternative
STP22NE10L (100V/<0 .085r="" be="" can="" in="" irl510n="" li="" lieu="" used="">
12VDC /2A powered prototype tested with a 12V (1A) Small PCB Drill Press

Source : http://www.electroschematics.com/8640/pcb-drill-speed-controller/

Arduino with keypad tutorial

2015-11-26T09:10:00.000-08:00

A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when pressed. If a keypad has 12 keys, it is wired as 3 columns by 4 rows. A 16 key pad would have 4 columns by 4 rows. Some time ago, I bought a couple of 3×4 membrane keypads from eBay. As usual it’s packed with zero documentation, thus it took couple of hours to get to work. Anyway the keypad is a perfect blend of art and technology with a price tag far below rubies!

Add caption

This little article is designed to help you get started with your new microcontroller + keypad project so let’s start. Following figure shows the internal structure and pin notation of the 3×4 keypad used for the experiment. The drawing is the result of an obscene amount of research work because I really wanted to make an error-free guide for the project we are working on.

keypad: internal structure and pin notation

Here is the same information in a textual way; keypad columns C1-C2-C3 are routed to pins 3,1,5 and rows R1-R2-R3-R4 are routed to pins 2,7,6,4 located at the end of the 7-pin flexible cable. Much more clear now?

keypad:colums And row switching

So now you can see how the button presses can be translated into electrical data for use with a microcontroller. We can now start the real experiment with as Arduino Uno by wiring up the keypad to the Arduino in the following/like manner:

Keypad pin 1 to Arduino digital 3 //C2
Keypad pin 2 to Arduino digital 5 //R1
Keypad pin 3 to Arduino digital 2 //C1
Keypad pin 4 to Arduino digital 8 //R4
Keypad pin 5 to Arduino digital 4 //C3
Keypad pin 6 to Arduino digital 7 //R3
Keypad pin 7 to Arduino digital 6 //R2

Since keypads are available from many retailers make sure you can get the data sheet as this will make the task easier when wiring them up. If your keypad is different, take note of the lines in the sketch from //keypad type definition, as you need to change the numbers in the arrays rowPins[ROWS] and colPins[COLS]. You should enter the digital pin numbers connected to the rows and columns of the keypad respectively. Example from Arduino playground:


#include "Keypad.h"
// keypad type definition
const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
{'1','2','3'},
{'4','5','6'},
{'7','8','9'},
{'*','0','#'}
};
byte rowPins[ROWS] = {5, 6, 7, 8}; //connect to the row R1-R4 pinouts of the keypad
byte colPins[COLS] = {2, 3, 4}; //connect to the column C1-C3 pinouts of the keypad

Next is a project example, where the Arduino is instructed to do something based on a correct key (secret number) being entered into the keypad, probably the most demanded application of the keypad. For this, just wire up the hardware (arduino+keypad) as described earlier.

Although the code is an entry-level one, it includes a secret key option that will need to be entered on the keypad. The Serial Monitor will tell whether the numerical-key inputted to the keypad is correct or not. To activate and deactivate the lock, the user must press * and then the secret key, followed by #. Okay, copy-paste, compile and upload this sketch (adaptation of a work by John Boxall) as usual:


#include "Keypad.h"
const byte ROWS = 4; // four rows
const byte COLS = 3; // three columns
char keys[ROWS][COLS] =
{
{'1','2','3' },
{'4','5','6' },
{'7','8','9' },
{'*','0','#' }
};
byte rowPins[ROWS] = {5, 6, 7, 8};
byte colPins[COLS] = {2, 3, 4};
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
char KEY[4] = {'1','2','3','4'}; // default secret key
char attempt[4] = {0,0,0,0};
int z=0;
void setup()
{
   Serial.begin(9600);
}
void correctKEY() // do this if the correct KEY is entered
{
   Serial.println(" KEY ACCEPTED...");
}
void incorrectKEY() // do this if an incorrect KEY is entered
{
   Serial.println("KEY REJECTED!");
}
void checkKEY()
{
   int correct=0;
   int i;
   for ( i = 0; i &lt; 4 ; i++ )
   {
      if (attempt[i]==KEY[i])
      {
         correct++;
      }
   }
   if (correct==4)
   {
      correctKEY();
   }
   else
   {
      incorrectKEY();
   }
   for (int zz=0; zz&lt;4; zz++) // clear previous key input
   {
      attempt[zz]=0;
   }
}
void readKeypad()
{
   char key = keypad.getKey();
   if (key != NO_KEY)
   {
      switch(key)
      {
      case '*':
         z=0;
         break;
      case '#':
         delay(100); // added debounce
        checkKEY();
         break;
      default:
         attempt[z]=key;
         z++;
      }
   }
}
void loop()
{
   readKeypad();
}

If your compiler raises an error “keypad does not name a type”, probably you have not installed the required Keypad Library correctly. If you still have the problem after downloading and installing the library, just drop me a line here in the comments.

Note that the good old 3×4 telephone keypad from your junk box can also be used for this project. Like most keypads, it is wired as an X-Y switch matrix, the normally-open switches connect a row (R) to a column (C) when pressed. Next figure shows the pin assignments of a generic 3×4 telephone keypad:

f you don’t know which pin represents which row or column, you have to fiddle the “rummy” keypad using your analog multimeter. It might take hours to get to work, be patient!

Note: At the middle of this experiment, I got another 3×4 keypad from an eBay seller with the “true” Arduino compatible pin-out (see figure shown below). If you are using this type, it would be better to change the arrays rowPins[ROWS] and colPins[COLS] in the sketch as indicated.

reposted by T.K.Hareendran in Arduino

source : http://www.electroschematics.com/12446/arduino-with-keypad/

Digital Radar Speedometer

2011-02-05T19:15:00.000-08:00

This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. The speed is calculated in kilometers per hour (KPH). Its display has three digits. This radar works with the laser reflexion. It sends laser radiation to the object and this object reflects the laser radiation to the radar. To evaluate the speed of a vehicle, we must be in front of it. In other words, the vehicle must come in our direction. The front of the radar must point the front of the vehicle. The radar has the shape of a pistol. In this radar, it has a laser LED and a laser diode. Both have a lens.

The laser LED can send a spot of light to a distance of 90 m (295 ft). It's very important that the distance range of the laser LED is 90 m, if not, the speed will not be calculated properly. The laser diode, which receives the light signal by the laser LED, must be able to detect the light which is same color as that emitted by the laser LED. The laser diode and the laser LED must be placed one beside the other. They are protected by a tinted pane. They must be placed at the front of the radar and point the outside. The radar is powered by a 9V battery and it has a SPST switch to control its power state.

The display, or the speed indicator, is placed at the rear of the radar, just on the right of the overload LED indicator. All the logic components of the circuit must be of the 74AS series and TTL type. Because they have short time of response (less than 1.7 ns) and have high frequency supports (more than 200 MHz). The radar can evaluate the speed of an object moving between 0 to 999 km/h. After this speed, the overload LED indicator will turn on and the "999" will still displayed. The radar displays the speed during 3 seconds, after this time, it displays "zero" (0).
source : http://iq-technologies.net

RS232 transceiver circuits

2011-02-05T06:42:00.000-08:00

RS232 transceiver circuits
There are serveral rs232 transceiver circuit which commond used for communicated between microcontroller and other devices such PC or any devices that use rs232.Here is a collection of rs232 transceiver circuits that popular for today.
The circit below use 2 transistor and some components to provide RS232 transceiver.It usefull for cheap application that dose not long lenght.

Fig 1. Transceiver with 2 transistor

MAX232(Full duplex)
The circuit below use MAX232 which is the MAXIM's devices.This circuit is very stable and use for professional design. This device is inexpensive and it can provides 2 channel for RS232 .
The MAX232 line drivers/receivers are designed for RS-232 and V.28 communications in harsh environments. Each transmitter output and receiver input is protected against ?15kV electrostatic discharge (ESD) shocks, without latchup.It can operate from a Single +5V Power Supply.

Fig 2. Use MAX232 for RS232 transceiver

DS275(Half Duplex)
This RS232 transceiver circuit use DS275 which is a small half duplex transceiver chip.I Compatible with RS–232–E signals and suitible for Low–power serial transmitter/receiver for battery-
backed application.Requies no external devices.

Fig 3. Circuit to use DS257

source : http://www.coolcircuit.com

3V/3A switching regulator

2011-02-05T06:20:00.000-08:00

3V/3A switching regulator
I build this project when I have a problem to driver stepping motor that draw current 3A at 3V.After search the infomation on the internet I have found LM2576-ADJ which is an adjustable output version of 3A Step-Down Voltage switching Regulator and capable of driving 3A load with excellent line and load regulation. You can change R1 and R2 for your desired output voltage.In my design I use the circuit from the example circuit in data sheet and it works fine.source :http://www.coolcircuit.com
Figure 1. 3V/3A Step-Down Voltage Regulator circuit
Figure 2. PCB over lay

EEPROM PROGRAMMER

2011-02-05T06:14:00.000-08:00

SI-Prog base: connect it to the PC DB9 serial port.
You can connect any of the following adapter card to the 10 pin connector. The interface sinks current from the PC serial port, so it doesn't need any external power.


SPI eeprom (25xxx, 95xxx) connect diagram to base board

source :http://www.lancos.com/siprogsch.html

GPS Vehicle Tracking - A Guide To The Tools Available

2010-09-24T09:50:00.000-07:00

GPS ? What does it stand for?

Global Positioning System ? Now, it is mainly used for navigation, both terrestrial and marine. Initially it was used by the U.S. military for locating and identifying friends as well as foes. The system uses military and commercial satellites for tracking anything that moves and has an emitter with or on it. Error margins, for GPS, are nowadays within 100 meters, and this can be narrowed down by using differential base stations (DBS). However, they are hard to use since their range is quite limited.

A new substitute for the American satellites will be the Galileo Satellite System, developed and realized in Europe. The first satellite, called Glove, was launched in late 2005 from Baikonur, Russian Federation.

GPS ? What can I do with it?

Here are just a few of this wonderful piece of equipment. For instance, if you get lost, your GPS unit can pinpoint you your current position, or, it can make a breeze from an awful task such as planning a trip. However, its main uses are in vehicle tracking. Most trucking companies have GPS units on all of their trucks. This way it is very easy to finding out where a trucker has been to, or where he currently is. Since the first GPS units were installed on trucks and cars, specialized companies and sites appeared.

Lets look at a two GPS units and their characteristics.

Garmin StreetPilot 2730

This is one of the latest products available on the market. Its producer presents it as being a ?great utility, even when drivers know exactly where they are.? Some of its features include access to the XM NavTraffic (a data-traffic information service, based on low orbit satellites, covering all of the USA), allowing it to suggest faster routes, before traffic-jam. The navigation map on StreetPilot 2730, graphically represents any incident affecting the road, including man-made, like road-construction, or accidents. Weather forecasts are also shown on the GPS unit, for as many as 162 cities. The StreetPilot 2730, also reads MP3s, and the music can be sent to the car?s stereo through its stereo jack or through a FM transmitter. The unit is equipped with an antenna, Garmin GXM 30, which can be placed on the roof of the car, or on the dashboard. It is waterproof and has a magnetic end, for easier placement.

Initial GD-70X

This ?little? gizmo has a 7? color LCD, the obvious GPS navigational system, as well as a DVD player, thus making it ideal for family vacations. It can pinpoint your location on the map, as well as playback your favorite movie or tracks. It has a set of maps which includes both Canada ant the US. Its map database includes over two million points of interest and it has a 250MB internal memory, large enough for downloading maps and POIs. An interesting feature are the voice directions, which will help you focus on the road, an still know where you are, and what kind of conditions you are facing out there. Also, it includes a day/night mode, making it easier to read according to the time of use. The incorporated CD/DVD player can keep the passengers entertained as well, and if you don?t have a car stereo (who doesn?t), you can always listen to its built-in stereo speakers.

These are just two of the many products on the market that can help you with GPS vehicle tracking.

Source: http://www.ArticlePros.com/author.php?Steve Armstrong

AVR ISP Programmer

2010-09-15T03:44:00.000-07:00

This AVR ISP original by ATMEL you can found on "AVR software and technical Library - April 2003" CD-rom.It small component count I design new PCB and change some component that easy to build small PCB .The new firmware was writen by John Samperi for AT90S2313. This code can program more devices.

Programmer supports the following devices AT90S1200 rev. A* AT90S1200 rev. B* AT90S1200 rev. C* AT90S1200* AT90S2313* AT90S2323* AT90S2333 AT90S2343* AT90S4414* AT90S4433 AT90S4434 AT90S8515* AT90S8535 ATtiny12 ATtiny15 ATtiny19 ATtiny28 ATtiny26 * ATmega8 * ATmega8 BOOT * ATmega16* ATmega16 BOOT* ATmega32* ATmega32 BOOT* ATmega64* ATmega64 BOOT* ATmega8515 * ATmega8515 BOOT* ATmega103 ATmega603 ATmega128 ATmega128 BOOT ATmega161 ATmega161 BOOT ATmega163 ATmega83 ATmega163 BOOT ATmega83 BOOT ATmega8535?? ATmega8535.

source :electronic-DIY .com

Battery Charger Display Using LT1639

2010-08-23T19:51:00.000-07:00

Battery Charger Display Using LT1639

The Over-the-Top type of operational amplifier is ideal for use as a current sense for battery charger applications. The design described here can be used with chargers for rechargeable batteries (Lead/acid or NiCd etc). The 5 V operating supply for the circuit is derived from the battery on charge. The circuit uses a sense resistor R8 to determine the value of current ﬂowing in or out of the battery. An LED output shows whether the battery is charging or discharging and an analogue output displays the battery charge or discharge current. The circuit can also be altered to shown different ranges of charging current to cater for higher capacity cells. IC1a and IC1b together with T1 and T2 form two current sources, which produce a voltage across R5. The voltage across R5 is proportional to the current through resistors R8 and R1 (for IC1a) or R8-R3 (for IC1b).

The current source formed by IC1a and T1 is active when the batteries are discharging and IC1b and T2 is active when the batteries are being charged. In each case the inactive opamp will have 0V at its output and the corresponding transistor will be switched off. IC1d amplifies the voltage across R5, which is proportional to the sense current. The component values given in the diagram produce an amplification factor or 10. A sense current of 0.1 A will produce an output voltage of +1 V. The supply voltage to the circuit is +5 V so this will be the maximum value that the output can achieve. This corresponds to a maximum charge/discharge current of 0.5 A To display currents from 0 to 5.0 A, resistor R7 can be omitted to give IC1d a voltage gain of 1.

Higher currents can be displayed by using a lower value of sense resistor R8. A DVM or analogue meter can be used at Vout to give a display of the charge/discharge current. The constant current sources can only function correctly when the supply to the voltage regulator circuit (UBatt. e.g. 6V or 12V) is greater than the operating voltage of the opamps (+5 V). The supply voltage to the LT1639 can be in the range of +3 V and +44V and voltages up to 40V over the supply voltage are acceptable at the inputs to the opamp. IC1c controls the charging/discharging LED output. The inputs to this opamp are connected to the outputs of the current source opamps and its output goes high when the battery is being charged and low when it is discharging.
source :www.extreamecircuit.net

ISP Flash Microcontroller Programmer

2010-07-01T07:39:00.000-07:00

Introduction
This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software which can program both the 8051 and AVR series devices.

Hardware
Figure 1 shows the circuit diagram of the in-system programmer interface, the power to the interface is provided by the target system. The 74245 ic isolate and buffer the parallel port signals.

Software
The ISP-30a.zip file contains the main program and the i/o port driver. Place all files in the same folder.
The main screen view of the program is shown in figure 3. Also make sure do not program the RSTDISBL fuse in ATmega8, ATtiny26 and ATtiny2313 otherwise further spi programming is disable and you will need a parallel programmer to enable the spi programming. For the fuses setting consult the datasheet of the respective device.

For the auto hardware detection it is necessary to short pin 2 and 12 of DB25 connector, otherwise the software uses the default parallel port i.e. LPT1.

Following are the main features of this software,
Read and write the Intel Hex file
Read signature, lock and fuse bits
Clear and Fill memory buffer
Verify with memory buffer
Reload current Hex file
Display buffer checksum
Program selected lock bits & fuses
Auto detection of hardware

Note:
The memory buffer contains both the code data and the eeprom data for the devices which have eeprom memory. The eeprom memory address in buffer is started after the code memory, so it is necessary the hex file should contains the eeprom start address after the end of code memory last address i.e. for 90S2313 the start address for eeprom memory is 0x800.

The software does not provide the erase command because this function is performed automatically during device programming. If you are required to erase the controller, first use the clear buffer command then program the controller, this will erase the controller and also set the AVR device fuses to default setting.

source : www.mytutorialcafe.com /By : Asim Khan

3 channel RF remote control

2010-06-28T11:47:00.000-07:00

This is a 3 channel RF remote control project.The transmitter powered by 3V .This remote control I use PIC12F509 from Microchip which is a 8-pin single-chip microcontroller designed for low pin count applications with 1 K words flash memory and 41Byte SRAM and some special features such Power-saving Sleep mode,Wake-up from Sleep on pin change.

selengkapnya

source :coolcircuit.com

TIPS FOR USING THE MONITOR CRT TV

2010-06-25T16:58:00.000-07:00

TIPS FOR USING THE MONITOR CRT TV

Tip's way of changing the configuration of the yoke CRT monitor that can be used in conjunction with the engine on the plane TV.Why must change first? because the value resistansi yoke horizontal monitor is very low (from 0.2 ohm - 0.6 ohm) to the value that could loaded to a series of horizontal deflection , a TV (0.6 ohm - 1.8 ohm). As a result, the burden of transistors Horizontal is a very heavy damage to be caused directly.
This time I try to give a little information about how to change.

You need to provide are:
1. CRT monitor with a yoke
2. TV module engine aircraft have facilities for model pinchussion or 21 "more.
3. Transformer yoke "wansonic" (to yoke or SVGA monitor monitor Flat)
4. Electronic tools (solder, tin, etc.).

First you need to do is, wiring attention to the order of the horizontal yoke, there is usually a series of additional monitors at the yoke (a series of dynamic convergence and pincushion series)

. Change the order of the first horizontal row in order to become a parallel way seri.withrelease all the dots connect in each of the horizontal yoke (the vertical is not necessary in the fox). Remove / disconnect all wiring of a series of additional (pincushion) is , take the tip of the end of the cable-spool reels from the core horisontal and you will get four end of the line / cable from the horizontal, the two left and right. with avo meter marks for each coil (coil A and coil B). Connect a one edge of a roller to the left edge of the coil B right.Dan the rest of the end of the two does not go through to the terminal point is that we will use the first .Proses completed, the next immediate resistansi you measure the value of the horizontal yoke do we change This is enough to range between 0.6 - 1.8 ohm meter precision with avo (accurate; recommended AVO meters with digital). if it is enough, CRT ready to use.

Some requirements do you need to note is: Never pull out the components especially the bracelet static CRT convergence in the neck, because if you have changed the day you may need even more to set back a position that has been set at the factory. this very critical for CRT monitor due to a number of pixel more than CRT TV, and for the reasons that I recommend to use the machine TV settings that have facilities pinchussion the stage images. (characteristics: there are two manual trimpot near vertical IC engine TV).
When the size of resistansi horizontal yoke is still too low (on the yoke or yoke monitor SVGA monitor 17 "or over the yoke also monitor Flat). We need to use additional components, the transformer yoke Wansonic (in particular by a manufacturer in wansonic to use by the TV assembly of the plane). transformer is encountered in manyin market with the engine output wansonic tv.

Using a transformer wansonic is as follows:
1.connect blue cable TV to the machine's foot nomor1 transformer also go directly to one of the horizontal yoke.
2. Connect the cable from the red machine to the TV last point (pin6 atau7) from the foot transformer.
3.connect red cable from the yoke to a pin in the transformer wansonic (pin4, 5,6,7) to adjust the width of the image.

Additional information; is recommended to use the machines that have a TV Facilities linearity that the pincushion on the left and right top-down can be arranged as soon as possible.

Congratulations to try and hopefully succeed.

regards,

SolderKnight

SETTING TV SONY

2010-06-10T22:02:00.000-07:00

Read the _ SERVICE MODE WARNING _ before proceeding.

Service switch - small, round opening in the rear cabinet near the Video inputs or the antenna jack (typically early-90's), push and hold while turning the power on - or if there is no service switch on the rear of the TV use the remote control and press within one second of each other:

[PWR OFF] - [DISP], [5], [VOL+], [PWR ON]
-or-

[PWR OFF] - [DISP], [5], [PWR ON]
-or-

[PWR OFF] - [DISP], [5], [VOL+], [PICTURE], [PWR ON]

The TV will turn on in service mode.

You may need to set the television into 'tuner' mode (instead of Video-1, etc.) before performing the service mode button sequence.

NAVIGATE IN SERVICE MODE
[1] = Moves to Previous Menu Item
[4] = Moves to Next Menu Item
[3] = Adjusts Value Up
[6] = Adjusts Value Down
[MTS] = Toggles Stereo/Mono Audio

SAVE NEW SETTING
[MUTE] followed by [ENTER] to store NEW setting to NVRAM

RESTORE USER SETTINGS
[8],[ENTER] = Restores All *USER* setting to Factory Defaults

RESET VALUES
[0],[ENTER] = Read Default Value from Stored Settings (Reset)

LEAVE SERVICE MODE
[PWR OFF] = Leave Service Mode any settings not written will be in effect until TV is unplugged or a Reset is performed.

RETURN TO DEFAULT SETTINGS:
* BEFORE storing NEW settings - unplug TV from wall, wait a few seconds, then plug back in, turn TV set on - All settings not written will have been lost.

* AFTER storing NEW settings - restore original value from list you made of original values before adjustments and store in NVRAM.

If you're attempting to adjust color or geometry errors, you'll need the Video Essentials DVD, Laser Disc or some other source of test material.

I also maintain a SONY XBR Service Mode list on my HomePage.

For additional information on how to preform the 16x9 squeeze (to view anamorphic DVDs at their full resolution) see the "16x9 (Anamorphic) Vertical Squeeze" or the "Sony Wega 16x9 (Anamorphic) Vertical Squeeze" FAQs that I maintain on my web site.

A complete although somewhat outdated list of Sony XBR Service Mode items can be found at http://www.repairfaq.org/~filipg/. This information appears to be for the ~1990 version of the XBR^2 series.

Note: Provisions for convergence adjustments are not enabled on 27" or smaller Sony direct view television sets.
5.1a SUGGESTED SONY SETTINGS
SONY "XBR" SERIES

TRINITONE: NTSC STD - controls color temperature - basically how greys will appear on the monitor. The "High" and "Medium" settings make everything look too blue.

NR: OFF - filters out high-frequency noise, at a slight loss of detail. Turn it OFF and the picture quality improves. It also tends to degrade fine picture detail.

DYNAMIC PICTURE: OFF - when turned ON it whitens light areas and darkens shadow areas of the picture, creating a high contrast although less accurate picture. Leave it OFF.

COLOR CORRECTION: OFF - when turned ON it tries to correct fleshtones but has a tendency to mix up certain colors and make them look like a prosthetic beige.

PROGRAM PALETTE: MOVIE: ON - only the movie mode allows the television set to run with flat and wide video bandwidth. It also shuts OFF scanning velocity modulation (SVM), when VMLV is run down to zero it will shut OFF SVM for the other modes. Each mode (Movie, Sports, etc.) has a separate adjustment memory.
SERVICE MODE ITEMS:

AXIS 0 Cleans up the red push & oranginess in the yellows
VAPI 0 Do this for all modes
VAPG 0 Do this for all modes
NRLV 0~3 Find the value 0-3 that gives the best resolution
VMLV 0 Scanning Velocity Modulation (SVM) OFF=0/ON=1
(do this for all modes)
Y-DC 0 Improves BLACK background level retention
R-YR 15 Sets the amount of RED
R-YB 15 Sets the amount of RED
G-YR 11 Sets the amount of GREEN
G-YB 9 Sets the amount of GREEN (8 or 10 may be closer)
SHPF 3 This helps with the sharpness (S-Video)

Setting R-YR and R-YB to 15 will greatly improve color accuracy and tone down the reds. Also, when Y-DC is changed from 1 to 0, DC restoration becomes almost perfect.

Sometimes setting items G-YR to 11 and G-YB to 9 may need some more fine tuning using the SMPTE color bars w/gray reference [split bar pattern] ("Color Bar w/75% Gray" VEDVD-18/3, Frame VE-46673, AVS-14415 - NOTE: VE 46673 is mis-calibrated, use AVS-14415) See the section on Setting Tint & Color Level: Matching Gray Reference for the procedure on how to adjust these two settings.

SONY "V" SERIES

GDRV 18 Green Amp.
BDRV 14 Blue Amp.
GCUT 4 Green Cutoff
BCUT 1 Blue Cutoff

Note: The setting for AMP and CUTOFF appear to be relative and not absolute on the "V" series - thus they may not work for your particular model TV.

WEGA SERVICE MODE ITEMS:

4BCT 7 input4 (component) Blue Cutoff (BCUT -1)
4BDR 30 input4 (component) Blue Amp (BDRV +1)
4GCT 5 input4 (component) Green Cutoff (GCUT +0)
4GDR 36 input4 (component) Green Amp ((GDRV +2)
BCUT 10 Blue Cutoff
BDRV 29 Blue Amp
GCUT 10 Green Cutoff
GDRV 34 Green Amp
DPIX 0 Dynamic Picture
Y-DC 0 Improves BLACK background level retention
HOSC 11 Fixes problem with color banding on component input

SONY "MODEL-ID" SETTINGS
These ID setting are different for every chassis - in general here's what they control:

ID-0 Controls number of active video jacks.
ID-1 This controls video features. Allows notch filter
(NOTC) to be turned off outside of service mode.
ID-2 This sets up user interface features. Enables Spanish
language menus. Allows naming of video inputs.
ID-3 Enables / disables Picture-In-Picture (PIP) support.
ID-4 Enables / disables Lumisponder option.

5.1b SONY MODEL NUMBERS

Model numbers:

KV-ddXBRss
KV = direct view sets
KP = projectors
dd = size of the display
XBR, V, S, T = model line designation.
ss = specific model designation, which appears to be independently unique.

5.1c SONY FRONT PROJECTORS

Someday I will have a complete web page devoted to Front Projectors, but until that day here's how to enter service mode on Sony's Front Projectors use:

[enter], [enter], [up], [down], [enter]

Be sure 'Status' is ON, if 'Status' is OFF, you won't be able to get into service mode.

The manual says to make sure the remote is hard-wired, but the IR mode has always worked fine for me.
5.1d SONY PLASMA MONITORS

Turn on the power. Press [Enter], [1], [8], [2], from the remote.

TV MENU SERVICE

MENU SERVICE CODE code is a condition for entry into the "SERVICE MODE". In terms repair television ..
there are several ways, including using the code number or alphabet or a combination of both .. way is to use tricks with the hardware at the point right men-short/jumper / or switch you provide the (sharp, panasonic, Thomson, Phillips, etc.).
here I will give you some way / code to open a menu of services from some television general circulation on the plane .. in Indonesia tv output starting from 2000/01 up to now, as most manufacturers only modify feature only.

TOSHIBA: press firstMUTE IN REMOTE,then press MUTE on RC + MENU IN simultaneous TV .. (repeated)
Press Menu-Press DIREMOTE FIGURES 4,7,2,5
Press VOL (-) IN TV-Press and hold FIGURES 9

SANYO: MENU IN REMOTE + VOLUME UP TV

LG Flatron: Press OK, OK DIREMOTE IN TV REMOTE MENU + or MENU IN TV

TCL: press DISPLAY (OSD) DIREMOTE + VOLUME DOWN IN TV, hold 3 seconds

Phillips: POSITION STNDBY TV, press 0,6,2,5,9, MENU

POLYTRON: POSITION STNDBY TV, press and hold MENU IN REMOTE TO TV on FIGURES entries of the code in 1013.

PANASONIC: SHORT (connect right) PIN 'FA-1' TO 'FA-2' OR TP-8 TO GROUND
PANASONIC TX SERIES: Press VOL (-) IN TV + OSD

SHARP: SHORT KAKI (PIN) PIN 6 AND 7 ON shortly MCU IC (TDA 98XXX). SHORT
BACK to exit

SHARP EXPRESSION: Connect the
Jumper J800
HAVE PROVIDED AND TWO jumpers in parallel.

CRYSTAL: POSITION STNDBY TV, press VOLIME VOLUME UP + DOWN ON TV
and hold

AKARI: Press SLEEP IN REMOTE + TV MENU

SAMSUNG: POSITION IN REMOTE Standby press: MENU - PSTD - MUTE - POWER ON
SAMSUNG PLANO: POSITION standby, press IN REMOTE: DISPLAY-MENU-MUTE-POWER ON
PLANO DIGITAL SAMSUNG HD100: Standby-DISPLAY-MENU-MUTE-POWER
OR: Standby-MUTE-1-8-2-POWER ON

.
Sharbysyd, FUJITEC, BOOMBA:
CHINA TV'S AND OTHERWISE USING THE PROGRAM IC TYPE LC8632XX SERIES: Press MENU IN REMOTE twice - RECALL (Q. VIEW) - MUTE.

TV CHINA OTHER (KCl, MITOCHIBA, BAZZOMBA) Press VOLUME IN TO TV NOL.push RECCAL ONCE IN REMOTE, press and hold VOLUME (-) along with the TV press RECALL BACK IN REMOTE .. the process to re-enter the sub menu next exits to the service menu.

AIWA: KEY MENU repairs ADA IN REMOTE FOR THE KEY IN VOLUME (+), loading first.

JVC: Press and hold BERSAMAAN OSD + MUTE
OR Press and hold OSD + PICTURE

HITACHI: Press and hold KEY AVDI TV, turn TV POWER SWITCH

SONY: Standby-OSD - 5 - VOL (-) - POWER ON

RCA / THOMSON: Press and hold KEY IN VT TV + POWER SWITCH ON TV

Some brands CHINA TV also have a menu button on the service in original Remote controller
.
Perhaps there is input from the other friends?

ZIC electronic

2SC2539 power amplifier circuit diagram

2010-05-25T23:22:00.000-07:00

This FM broadcast rf amplifier is built with 2SC2539 which is a silicon NPN epitaxal planar type transistor designed for RF power amplifiers in VHF band mobile radio applications. It can deliver up to 15W at a 2W input power.
L1: 2T Coil diameter:4mm
L2: in series 6pcs Toroidal ring
L3: 4T Coil diameter:10mm
L1: 3T Coil diameter:10mm
2SC2539 features

High power gain: Gpe >= 14.5 dB at Vcc=13.5V, Pout = 14W and f=175MHz
Emitter ballasted construction and gold metallization for high reliability and good performances
Low thermal resistance ceramic package with flange
Ability of withstanding more than 20:1 load VSWR when operated at Vcc=15.2V, Pout=18W, f=175MHz, Tc=25⁰C

2SC2539 application
10 to 14 watts output power amplifiers in VHF band mobile radio applications.

source: www.electroschematics.com

Field strenght meter with Attenuator up to 200 Mhz

2010-05-22T22:24:00.000-07:00

The RF field meter unit will be in great help to tune transmitters for best performances. You can measure the radiated energy field and can easy tune the system for max output field strength (maximum power).

RF Field Strength Schematic
This field strength meter with selectable attenuator. You can used it for measuring the antenna gain and pattern, compare different magnetic field strength. See the following RF field strength meter schematic.

RF Field Strength Features:

Input Terminal: SO-239 (M type) or BNC
Output Display: Analog power meter modify from a 50uA current meter and after calibrate with a RF generator.
Measuring Range: From +3dBm to -35dBm with attenuator. (0dBm = 1mW at 50ohms)
Operating Frequency: 100kHz to 200MHz
Power Source: No need.
Attenuator Range : With 6 ranges (0dB, 3dB, 6dB, 9db, 12dB, 15dB)

Source: frtransmiter.blogspot.com
Field strength meter with attenuator

Amplifier

2010-03-09T19:20:00.000-08:00

features :

• Up to 30 watts output power
• AVO typically 90 dB
• Low distortion: 0.015%, 1 kHz, 20 W
• Wide power bandwidth: 70 kHz
• Protection for AC and DC short circuits to ground
• Thermal protection with parole circuit
• High current capability: 4A
• Wide supply range 16V-60V
• Internal output protection diodes
• 94 dB ripple rejection
• Plastic power package TO-220

General Description
The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.

The LM1875 delivers 20 watts into a 4 or 8 load on ±25V supplies.

Applications
• High performance audio systems
• Bridge amplifiers
• Stereo phonographs
• Instrument systems

       Parameters     Values
Power@ 4Ohms, 1% THD     20 Watt
Power@ 8Ohms, 1% THD     25 Watt
Power@ 8Ohms, 10% THD     30 Watt
THD     0.022 %
PSRR     95 dB
Channels     1 Channels
Special Features     AvCl>10
THD Conditions     Pout=20W, 4ohm load, 1kHz
User Supply     50 Volt
Supply Range     +20 - +60V
Supply Min     16 Volt
Supply Max     60 Volt
Gain Bandwidth     5.5 MHz
Slew Rate     8 Volts/usec
Temperature Min     0 deg C
Temperature Max     70 deg C

source :National Semiconduktor

Amplifier 50 watt

2010-02-09T08:01:00.000-08:00

This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo
or other line level device. It also has a phono input for a record player, guitar, microphone or other un-amplified source. With the addition of a low pass filter at the input, it makes a great amp for a small subwoofer.

Schematik

Description
R1    1    200 Ohm 1/4 W Resistor
R2    1    200K 1/4 W Resistor
R3    1    30K 1/4 W Resistor
R5    1    1K 1/4 W Resistor
R6    1    5K 1/4 W Resistor
R7,R10    2    1 Meg (5%) 1/2 W Resistor
R8,R9    2    0.4 Ohm 5 W Resistor
R11    1    10K Pot
R12,R13    2    51K 1/4 W Resistor
R14    1    47K 1/4 W Resistor
C1    1    100uF 35V Electrolytic Capacitor
C2    1    0.011uF Capacitor
C3    1    3750pF Capacitor
C4,C6    2    1000pF Capacitor
C5,C7,C8    3    0.001uF Capacitor
C9    1    50pF Capacitor
C10    1    0.3uF Capacitor
C11,C12    2    10,000uF 50V Electrolytic Capacitor
U1,U2    2    741 Op Amp
U3    1    ICL8063 Audio Amp Transister Driver thingy Download data sheet Ic L8063
Q1    1    2N3055 NPN Power Transistor
Q2    1    2N3791 PNP Power Transistor

Notes
1. I know I skipped R4. That is not a problem :-)
2. Distortion is less than 0.1% up to 100HZ and increases to about 1% at 20kHz.
3. I haven't been able to find anyone who sells a suitable T1. You can always use two 24V 5A units in series. If you are building two amps (for stereo), then I would suggest using an old microwave transformer and rewinding it.
4. Q1 and Q2 will require heatsinks.
5. You may have trouble finding U3 because it is discontinued. Please don't email me about sources...I can't find it either. A possible source was sent in by JBWilliams:

soure: electronik-Lab.com

2600 lcd -ways

2009-12-30T04:38:00.000-08:00

Trik jumper nokia 2600,lcd ways

source:Bourri Gsm

Sms Remot Controller

2009-02-05T21:48:00.000-08:00

SMS Remote Controller With Ericsson GSM : T10, T18, 28 Trough Microcontroller AT90S2313

Introduction:
With this circuit we can controll up to 8 devices by sending a specific SMS message with any mobile phone. Its very usefull at the cases that, at the place we have the devices, we have not a wired telephone line. If you have an old ericsson mobile phone and you are not using it, its the time to build some useful with that. The controlling that we can do to the devices, its only ON or OFF.
The circuit:
The hardware of the circuit its very very simple, because the communication port of ericsson mobile its working at the 5 volts with AT commands ( like the modem commands, but for mobile phones).
The firmware of the AT90S2313 its very complicated because, we have to convert the 'septets' of the phone to 'octets' because the AVR need bytes with 8 bits length ( The 'septet' is 1 byte with 7 bits length and 'octet' is 1 byte with 8 bits length). All this proccess its necessary to decode the message from SMS.

When you finish the circuit connect it to the mobile phone, turn on the phone and then power on the circuit, not before . The AVR now its trying to read the message from the 1st memory location of the phone, for that i suggest to delete all SMS messages from the phone before connect it to the circuit. If there is no message to the 1st memory location, the AVR its trying again until you sent any.
The format of the message must be only '1' or '0'. '1' to enable, or '0' to disable the device. The message must have only 8 numbers, '1' or '0' , alone or mixed .
Example: if you send the message 11000100 then you enable, starting from the right, the devices 3,7,8 ('1') and disabling the devices 1,2,4,5,6 ('0') .
If you want to send a new message and you don't want to change some device, must send the same number as the old message.
Example: If you want to enable only the 5th device, you must send a new message like 11010100 to keep the other devices as there are (we send the same message as the old ( 11000100 ) and we change only the 5th bit from '0' to '1' to enable the device ).
Attention !!!
You sould write only '1' or '0' characters to your SMS message with NOT any letter or symbol like 'A' , 'B' , '$' or '@' etc . At this case the AVR will disable the device of this message potition. If you send the message 10111$00 , then except the device 1 and 2, the AVR will disable the 3th device too.
If you want to protect your devices from other person's messages, modify the source code, to read the AVR, your telephone number before execute any message. In the source code i have some part of code, to read the telephone number, the service center number, the date and the time of the received message.
The project its based on the Greek mobile phone network of ' Telestet ' and i don't know if the SMS message in other country, have the same syntax ( I mean the form of the septets that the GSM receiving from the GSM network ).
After the GSM receive the message, the AVR execute it, delete it from the phone memory, to release the 1st memory location and start again to search for a new message.
If you connect the pin 1 (PD0) of the AVR to MAX 232 chip and this to computer, you will see at the terminal window software, all the data that the GSM is send to the AVR (Sender's number, service center number, date, time and the AT commands ) . Setup the COM port to 9600 bps 8n1.
source: mytutorialcafe.com

microcontroller family

2009-01-24T20:46:00.000-08:00

8051 Microcontroller Family
Fan Thermostat Build a simple fan thermostat with LM35, ADC0804 and 89C51.
Data Acquisition System with VB Build a data acquisition system with Visual Basic and the 89C51.
The 89Sxx learning board Build a simple and cheap 89Sxx MCU learning board by Tahan Prahara, Indonesia.
The 89C51 PABx Mohammad Shakeel from Pakistan describes how to build a simple PABx board using the 89C51.
89S52 Project Board Simple 89S52 board for student projects.
Controller for Hybrid Power Plant The 89C51 control board for controlling photovoltaic-wind turbine and diesel engine. Developed by Didik Rostyono from Indonesia.
LCD Thermometer 2nd version of Thermistor Thermometer.
Thermistor Thermometer Simple thermometer made with NTC thermistor.
Digital Clock with Alarm using DS1307 new design by Ajay Bhargav, best for student projects.
SPI Flash Microcontroller Programmer V3.7, new hardware and software for programming 89Sxx and AVR chips. Designed by Mohammad Asim Khan.

Touch sensitive burglar alarm

2008-04-18T16:04:00.000-07:00

Touch sensitive burglar alarm for internal security

This simple circuit when connected to a metal locker or cupboard generates an alarm when touched by an undesired entity.

The transistor gets saturated by just touching its base. Here is a simple, low cast touch switch with alarm based on this idea. The 50 Hz hum present in our body is the key to this circuit. BC 549 transistor has been chosen for this circuit. The circuit is basically a burglar alarm with timer. Timer circuit is a monostable multivibrator. Initially voltage at pin 2 of IC 1 is low.

If the sensor, which is the base of the transistor T1 is touched by the finger (even the slightest, touch will do) transistor T1 is saturated. Now the voltage at pin 2 of IC 1 is greater than 1/3 Vcc. As a result IC 1 gets a trigger pulse at its trigger input pin 2. Therefore its out goes high for a predetermined time period. The period can be adjusted by varying the value of resistor R1 or capacitor C1 as T=1.1*R1*C1 sec.

The siren circuit is build around IC 2 (UM 3561). Since the output of IC 1 is high, the IC 2 gets power supply. The output from IC 2 is amplified by transistor to drive an 8-ohm, 500mw load-speaker.

source: www.electrosofts.com