DIY Circuit

Battery Charger with Temeperature Sensor

2016-09-27T17:48:00.000-07:00

Battery with a LM35 temperature sensor on the charger used to monitor the battery temperature is in charge. Battery temperature sensor is needed because the battery temperature will rise at the time in charge. Battery temperature sensor LM35 temperature sensor has high accuracy in monitoring the battery temperature, it is because the temperature sensor LM35 is a temperature sensor that can convert temperature changes into voltage changes linearly.

At the time of the charge a battery will experience changes in temperature, where the battery temperature will begin to rise when the battery began to fill. To avoid over heat the battery, the battery temperature sensor LM35 temperature sensor is required to terminate the battery charging current to avoid overheating.

Battery charger with temperature sensor schematic

On the battery charger circuit temperature sensor with temperature sensor 35 lm above the R1 is used for setting the maximum value of the desired temperature. Therefore, when the temperature was in-charge the battery begins to rise and reach temperatures setup then this series will break the current battery charge.

Power Supply for Amplifier circuit

2016-09-25T17:36:00.000-07:00

Power supply

As with most power amplifiers, the ±60 V power supply need not be regulated. Owing to the relatively high power output, the supply needs a fairly large mains transformer and corresponding smoothing capacitors—see circuit diagram below.

Note that the supply shown is for a mono amplifier; a stereo outfit needs two supplies.

The power supply is straightforward, but can handle a large current. Voltage 'ac'serves as drive for the power-on delay circuit. The transformer is a 625 VA type, and the smoothing capacitors are 10 000 µF, 100 V electrolytic types. The bridge rectifier needs to be mounted on a suitable heat sink or be mounted directly on the bottom cover of the metal enclosure.. The transformer needs two secondary windings, providing 42.5 V each. The prototype used a toroidal transformer with 2x40 V secondaries. The secondary winding of this type of transformer is easily extended: in the prototype 4 turns were added and this gave secondaries of 2x42.5 V.
Source:www.elcircuit.com

5 Volt Switching Regulator Power Supply

2016-09-25T17:35:00.001-07:00

The switching regulator power supply used LM2575-5.0 on this schematic. You can make the stable voltage by using the 3 terminal regulator like LM317. However, because the output electric current and the inputted electric current are the same approximately, the difference between the input electric power (The input voltage x The input electric current) and the output power (The output voltage x The output current) is consumed as the heat with the regulator. Because it is, the efficiency isn�t good.

Data sheet for LM2575

SIMPLE SWITCHER 1A Step-Down Voltage Regulator

http://www.elcircuit.com

12 Volt Battery charger , and also can Accu Charger

2016-09-25T17:35:00.000-07:00

This 12 Volt Battery charger circuit best performance to charger 12 volt battery . Why this charger is best performance because this 12 Volt Battery charger quickly to recharger battery and shuts off at full charge. Initially , charging current is limited 2 A , but you can change for the transistor. As the battery voltage rises , current to the battery decreases , and when the current has decreases to 150 mA or 0.15 A this 12 Volt Battery charger switches to a lower float voltage , which prevents overcharge.

See this 12 volt battery charger schematic below :

12 Volt Battery charger Click to view Enlarge

The 12 Volt Battery charger can be charger wet accu and dry accu , and to be make the accu old last longer. The output charger goes to 14.5 Volt. As the battery or accu approaches full charge , the charging current decreases and the output voltage is reduced from 14.5 Volt to about 12.5 volt, terminating the charging.

source:www.elcircuit.com

Faster Battery Charger Circuit 6-12 Volt with IC LM308 and LM317

2016-09-25T17:34:00.000-07:00

This circuit is quickly charging the battery . If you need a faster charger ,this circuit is recomended to you . And this charger is low temperature , the temperatur is 5 degree celcius. Input Voltage is 15 Volt DC , and Output voltage to charging 6 -12V and you can adjust by the D1 (see schematic). And adjust the D1 to 50 mV greater VZ than D2 (see schematic). Couple the D2 to battery. This circuit operating by IC LM308 and LM317 and any other components. And you can use this circuit to charging Accu 6 or 12 Volt , dry or wet and other battery .

See this Schematic Circuit below :

source:www.elcircuit.com

12 Volt Nicad Battery charger

2016-09-25T17:33:00.000-07:00

This circuit can be charged the 12 nicad battery , and the circut charger at 75mA until until the battery is fully , when the battery is fully the voltage to be down . This charge can charged fully in a hour , because the charge can't quickly charged , But the charge can stabilized output voltage.

See this charger schematic below :

source:www.elcircuit.com

High HiFi Power Amplifier with MOSFET

2016-09-25T17:31:00.000-07:00

Circuit amplifier "High Power HiFi Power Amplifier With MOSFET" is capable of giving the output power to the load speakers 240Watt and 380Watt 8Ohm to load 4Ohm speakers.

Voltage source to a series of power amplifiers "High Power HiFi Power Amplifier With MOSFET" This is a CT 25V 50V 25V to 50V CT of transformer CT. In making this power amplifier needs to be installed heatsinks on the power amplifier (MOSFET) in order to avoid excessive heat. The series of power supply to power amplifer can use the transformer 5A-20A and 35A mounted diode bridge and capacitors for a minimum of 2x 10.000uF electrolit. Details for the power amplifier circuit can be seen in the following figure.

High Power Series HiFi Power Amplifier With MOSFET can modify to increase power output by doubling the final power amplifier is based on the diiginkan. Power generated from doubling the final power amplifier will also double its power output of power amplifier circuit "High Power HiFi Power Amplifier With MOSFET" it. source:elcircuit.com

Power Amplifier Class-A circuit

2016-09-25T17:29:00.000-07:00

This is a design schematic Class A power amplifier . This is a close as possible in operating parameter the Under Classes is class B , to aid comparison ; in particular the NFB factor remains 30dB at 20 kHz. The front end is similiar to class B amplifier. This circuit uses a standart quasi output. This may be replaced by a CFP stage without problems. In both cases the distortion is extremely low, but gratifyingly the CFP proves even better than quasi , confirming the simulation results for output stages in isolation.
About Class-A amplifier , in this class is the highest class from another class. Classes below begin from AB to Class S. In a Class-A amplifi er current fl ows continuously in all the output devices, which enables the nonlinearities of turning them on and off to be avoided. They come in two rather different kinds, although this is rarely explicitly stated, which work in very different ways. The fi rst kind is simply a Class-B stage (i.e. two emitter-followers working back to back) with the bias voltage increased so that suffi cient current fl ows for neither device to cut off under normal loading.
The great advantage of this approach is that it cannot abruptly run out of output current; if the load impedance becomes lower than specifi ed then the amplifi er simply takes brief excursions into Class-AB, hopefully with a modest increase in distortion and no seriously audible distress.

This is schematic power amplifier class A below :

Click image to view larger

The operation of current regulator TR13 , TR15 , TR 16 has already been described. The reference used is a National LM385/1.2 Its output voltage is fixed at 1.233 V nominal ; this is reduced approximately 0.6V by 1k - 1k divider . The circuit is the best for me , because is loudly , and does not vibrate the speakers leaves , softly sound , and low noise . And i like it .,., :)

For the hobby electronics especially in the amplifier , the above circuit is suitable to be tried.

Microcontroller to RS-485 circuit

2016-09-15T15:50:00.000-07:00

Microcontroller to RS-485 circuit | RS-485 bus can carry up to 256 transceiver modules and over long distances . This is a circuit for connect microcontroller with Rs-485 bus.

Max485

Max485 are low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. Line Length vs. Data Rate The RS-485/RS-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, see Typical Applications The MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 transceivers are designed for bidirectional data communications on multipoint bus transmission lines.

Microcontroller to RS-485 circuit diagrams

Features

- In μMAX Package: Smallest 8-Pin SO

- Slew-Rate Limited for Error-Free Data Transmission

- 0.1μA Low-Current Shutdown Mode

- Low Quiescent Current

- -7V to +12V Common-Mode Input Voltage Range

- Three-State Outputs

- 30ns Propagation Delays, 5ns Skew

- Full-Duplex and Half-Duplex Versions Available

- Operate from a Single 5V Supply

- Allows up to 128 Transceivers on the Bus

- Current- Limiting and Thermal Shutdown for Driver Overload

RS232 to RS485 Circuit

2016-09-15T15:49:00.001-07:00

The new archetypal of RS485 advocate overcomes the RTS controlled botheration accomplished by our chargeless design. However, to do that requires a microprocessor, so there is a greater complication to the design. We advertise this unit, although currently we are attached our sales to barter who can pay by coffer alteration – which in absoluteness is bounded Australian companies.

This architecture has been almost agitation free, and if you crave quantities we can acclimate the adapter pinout to clothing your appliance – about again the accessory will no best fit the simple little D25 case in which you see it pictured.

Click image to view larger RS232 to RS485 Circuit

* Data (vs RTS) controlled – does not rely on PC handshake timing

* DB25 RS232 connector compatible with PC

* TxD and RxD translated from RS232 to RS485

* Direction of transmission controlled by Data

* Handshake loop the PC connection so it works with all software

* RS485 signals output on D9 male with lots of Ground pins

* Indicator LED(s) to show communications traffic

* Line powered – powered by RS232 handshake lines

* RS485 Termination resistor not included

* Pullup/Pulldown resistors on RS485 to establish line-idle condition

* Baud rate is dipswitch selectable 1200 – 115.2k

Programming Learning MCS51

2016-09-15T15:49:00.000-07:00

Programming Learning MCS51

Learning Programming MCS51 becomes mandatory we learn if we want to use the MCS51. In the first part of this Learning Programming MCS51 we will learn together about the basic programming language MCS51 microcontroller. Where to program MCS51 outline there are 2 core parts of pemrogramanya language is "Words Work" and "Object". In the article Programming MCS51 this first part we will study first the "verb" is a command group Peng-copies of data, the command group arithmetic and logic command group.

Reference to DATA IN PROGRAMMING MCS51

Data can be in many different places, thus known a few ways to describe the data (in English often referred to as 'Addressing Mode'), among others, as follows:

The mention of constant data (immediate addressing mode): MOV A, # $ 20. Constant data is data that was in the instructions. Examples of this instruction has the data meaning a constant $ 20 (as a constant data marked with '#') on-copy it into the accumulator A. What needs to be properly addressed in this order is the number $ 20 is part of the instruction.

Reference to data directly (direct addressing mode), this method is used to refer to data residing in memory by calling the memory number where the data are: MOV A, $ 30. Examples of these instructions have the meaning of data in the memory number $ 30 in-copy it to the accumulators.

At first glance these same instructions to the instruction constant data above, the difference above instructions using the '#' which marks the $ 20 is a data constant, whereas in this instruction because there was no sign '#' then $ 30 is a number from memory.

The mention of indirect data (indirect addressing mode), this method is used to refer to data residing in memory, if memory data storage is changing its location so that the memory number is not called directly but in-'titip' her into another register : MOV A, @ R0.

In this instruction versatile R0 register is used to record the number of memory, so that this instruction has a memory meaning that the number recorded in the contents of R0-copy it into the accumulator A.

Sign '@' is used to mark the memory number stored in R0.

Compare this with the instruction memory number directly mention above, in this instruction first memory numbers are stored in R0 and R0 appoint a role which memory is used, so that if the value of R0 change the designated memory will also be changed as well.

In this instruction registers R0 functioning multipurpose container for the address register (indirect address register), other than all-purpose registers R0 R1 can also be used as a container for the address register.

Reference to data in the register (register addressing mode): MOV A, R5. This instruction has the meaning of data in all-purpose register R5 is copy it into the accumulator A. This instruction makes all-purpose registers R0 to R7 as a place to store data that is very practical that it works very fast.

The data referred to in the discussion above all in the data memory (including all-purpose registers are also located in data memory). In writing the program, often required standard table that is stored along with the program. Tables of this kind is really a data residing in program memory!

For this purpose, MCS51 have any mention of data in memory means programs conducted by indirect (indirect addressing code mode): MOVC A, @ A + DPTR.

Notice in this MOV instruction is replaced with MOVC, the additional letter C is meant to distinguish that this instruction is used in the program memory. (MOV without the letter C means that the instruction used in the data memory).

Sign '@' is used to mark A + DPTR is used to indicate the number of contents in-memory copy it to the accumulator A, in this case the value stored in the DPTR (Data Pointer Register - 2 bytes) plus the value stored in accumulators A (1 byte) is used to refer to the program memory numbers.

'Verb' in AT89Cx051

Overall AT89Cx051 have as many as 255 kinds of instruction, which was formed by combining the 'verb' and objects. "The verb 'is the group discussed the following:

PENG GROUP-COPY-DATA AN MCS51

Basic code for this group are MOV, abbreviation of MOVE, which means to move, though more correct to say this command have meaning copying the data. This can be explained the following: after the instruction MOV A, R7 done, accumulators A and all-purpose register R7 contains the same data, originally stored in R7.

MOV command is distinguished according to the type of memory AT89Cx051. This command is on the memory data is written into MOV, for example:

MOV A, $ 20

MOV A, @ R1

MOV A, P1

MOV P3, A

To use the program memory, this command is written into MOVC, there are only 2 types of wear MOVC instructions, namely:

MOVC A, @ A + DPTR; DPTR as register indirect

MOVC A, @ A + PC, PC as the register indirect

In addition, there is also known MOVX command, the command that is used for external data memory (X singkatakan from External). This command is only available to the MCS51 family members who have an external data memory, for example AT89C51 and so forth, and certainly not known by the group that tidam AT89Cx051 have external data memory. There are only 6 kinds of wear MOVX instruction, these instructions are:

MOVX A, @ DPTR

MOVX A, @ R0

MOVX A, @ R1

MOVX @ DPTR, A

MOVX @ R0, A

MOVX @ R1, A

GROUP ARIMATIK (ADD, ADDC, SubB, DA, MUL and DIV)

ADD and ADDC command

The contents of accumulators A plus the number 1 byte, the sum will be collected back in the accumulator. In this operation Carry bit (C flag in the PSW - Program Status Word) serves as a reservoir overflow of the sum. If the sum of the abundance (a value greater than 255) will carry bit value '1 ', if not Carry bit value '0'. ADDC same with ADD, only in bits Carry ADDC value in the previous process involved summed together.

Numbers 1 byte is added to the accumulator, can be derived from a constant, from the all-purpose register, memory data from memory number is called directly or indirectly, as shown in the following example:

ADD A, R0; register versatile

ADD A, # $ 23; a constant

ADD A, @ R0; no memory indirect

ADD A, P1; no direct memory (port 1)

ORDERS IN PROGRAMMING SubB MCS51

The contents of Accumulator A less the number 1 byte follows with Carry bit value, the reduction will be accommodated again in the accumulators. Carry bits in this operation also serves as a reservoir overflow of the reduction. If the reduction is abundant (score less than 0) bits Carry would be worth '1 ', if not Carry bit value '0'.

SubB A, R0; A = A - R0 - C

SubB A, # $ 23; A = A - $ 23

SubB A, @ R1

SubB A, P0

DA command

DA command (Decimal Adjust) is used after the command ADD, ADDC, or SubB, used to convert 8-bit binary value stored in the accumulator into 2 pieces decimal number, each consisting of 4-bit binary value.

MUL AB ORDERS IN PROGRAMMING MCS51

8-bit binary number in accumulator A is multiplied by an 8-bit binary number in register B. The result of multiplication of binary 16-bit, 8 bit binary number that greater weight be accommodated in the register B, while the other 8 bits are accommodated in the smaller weight accumulator A.

OV bit in the PSW (Program Status Word) is used to mark the result of multiplying the existing value in register B. OV bit will be worth '0 'if register B is worth $ 00, if not worth OV bit '1'.

MOV A, # 10

MOV B, # 20

MUL AB

DIV AB ORDERS IN PROGRAMMING MCS51

8-bit binary number in accumulator A is divided by an 8-bit binary number in register B. The result of the division of 8-bit binary numbers stored in the accumulator, while the rest of the division of 8-bit binary number stored in register B.

OV bit in the PSW (Program Status Word) is used to mark the value before the division that exists in the register B. OV bit will be worth '1 'if register B originally worth $ 00.

GROUP LOGIC (ANL, ORL and XRL) IN PROGRAMMING MCS51

This command group used to perform logic operations MCS51 microcontroller, logic operations can be done is the AND operation (operation code ANL), OR operation (operation code ORL) and the Exclusive-OR operation (XRL operation code).

The data used in this operation can be data that is in the accumulator or data that are in-memory data, this is a little different with arithmetic operations that must be actively melihatkan accumulators.

Operating results are accommodated in the first data source.

AND logic operation is widely used to me '0' a few specific bits of an 8-bit binary number, the way to forming an 8-bit binary numbers as a data-ANL constant in a number of origin. Bit-'0' want in a represented by '0 'in constant data, while other bits given the value '1', eg

Instructions ANL P1, #% 01111110 will result in bit 0 and bit 7 of Port 1 (P1) value '0 'while the other bits remain unchanged in value.

OR logic operation is widely used to me '1' a few specific bits of an 8-bit binary number, the way to forming an 8-bit binary numbers as constant data in a number-ORL origin. Bit-'1' want in a represented by '1 'in constant data, while other bits given the value '0', eg

Instructions ORL A, #% 01111110 will result in bit 1 to bit 6 of the accumulator value '1 'while other bits remain unchanged in value.

Exclusive-OR logic operation is widely used to reverse the value (complement) some particular bits of an 8-bit binary number, the way to forming an 8-bit binary numbers as constant data in a number-XRL origin. Bit you want behind-the value represented by '1 'in constant data, while other bits are the value '0', eg

Instructions XRL A, #% 01111110 will result in bit 1 to bit 6 of the accumulator turned value, while other bits remain unchanged in value.

ADC 0804 Microcontroler Interface Engineering

2016-09-15T15:48:00.000-07:00

Microcontroller Interface Engineering With ADC 0804

In ADC 0804 interface techniques with microcontrollers are pin-pin control must be controlled if we want to use the ADC with the microcontroller, there is value addition refferensi voltage to be supplied in 0804 ADC interface with a microcontroller, for example, we use the 0804 ADC (8 bit), if we give refferensi voltage 2.55 volts then we will get the increase of 1 bit to change 10 mVolt. Please note that the 0804 ADC pin on the leg that is form Vref Vref / 2, so to get a 10mV resolution is necessary for setting Vref / 2 equal to 1.275 V

The interface circuit microcontroller with ADC 0804

Mechanical interface microcontroller with ADC 0804

The steps in accessing data from the ADC 0804 by the microcontroller sebgai follows;

Enable ADC with signal 0 at the foot of Chip Select.

Give commands from conversion by providing a low pulse to the foot of the ADC Write narrow

Wait for the ADC issued a signal 0 from his leg INT

Give a moment of time delay for data from the ADC is correct

Give the read command by giving the signal 0 at the foot of ADC Read

Give a moment of time delay

Now data from the ADC is ready for use and if the microcontroller.

2 Transistor Line Follower Robot

2016-09-15T15:47:00.001-07:00

Make a line follower robot can be done with two transistors. Line Follower Robot series is one of the two transistors contor robot line follower circuit is in Bagun with two NPN transistor and the motor driver as well as processing of sensor signals.

In the circuit of line follower robot consists of two parts of the same, only different functions for the motor driver the right and left. Sensor circuit of line follower robot uses the LDR and LED. LDR sensor sensitivity can be set with the VR 10 is mounted in series with the LDR. For more details, see the following figure.

Line Follower Robot series 2 Transistor

The working principle of the motor driver circuit between the right and left together, when the LDR get the reflection of light from the LED LDR resistance will decrease and make the transistor saturation and motor gets supply and rotates so that the robot moves forward. So at the moment is not the case then the motor did not get a supply, for example, only one sensor is exposed line and make the LDR did not receive the reflected light is then Motr in the stationary and the other motor rotates and makes the LDR are back in the reflection of light and the robot moves forward again.

Line Follower Robot

Atmel microcontroller-Easy Downloader Circuit

2016-09-15T15:47:00.000-07:00

Easy Downloader Circuit

Atmel microcontroller series AT89Cxx51 Easy Downloader is one of the downloader that is often used to write data to program the Atmel microcontroller AT89CXX51. Easy Downloader AT89Cxx51 ATMEL microcontroller is using the serial port as a channel of communication with the computer.

Easy Downloader ATMEL Microcontroller AT89Cxx51 can be used to program Atmel AT89CXX51 in parallel. Atmel microcontroller series AT89Cxx51 Easy Downloader is quite simple to make your own because the components necessary to membutanya not complex. Atmel microcontroller series AT89Cxx51 Easy Downloader do not support the serial programming microcontrollers ISP. In the article Easy Downloader ATMEL Microcontroller AT89Cxx51 only displays images Easy Downloader Microcontroller series from Atmel AT89Cxx51 only and are simple.

AT89C2051 microcontroller circuit

2016-09-15T15:46:00.001-07:00

Real time controller AT89C2051

Real time controller is a device used to exercise control over household device continuously ongoing and scheduled. The series of Real Time Controllers with microcontroller AT89C2051 which dituls in this article is a tool that can do that serve targeted. The series of Real Time Controller with Microcontroller AT89C2051 Atmel AT89C2051 uses a data processor and controller as device installed.

In the application directly devices requires a separate interface from a wide range of Real Time Controllers with this AT89C2051 microcontroller. When will connect the device with the AC power source to use interface optocoupler (MOC) or solid state relay. Devices that can be connected with the series of Real Time Controller with Microcontroller AT89C2051 include lights, water machines, fans, electronic gate. The series of Real Time Controllers with this AT89C2051 microcontroller to control a height of water level, controlling the flame lights the scheduled SCARA and censored.

Specifications Series Real Time Controller with AT89C2051 Microcontroller

The series of Real Time Controller with Microcontroller AT89C2051 uses a computer to perform serial communication settings via computer. The series of Real Time Controller with Microcontroller AT89C2051 has 6 units of output channels that can be independently controlled depending on the program induced in the tool. Output in the series of Real Time Controller with AT89C2051 microcontroller requires an interface to deal with equipment that will be in control.

SMS Remote controller circuit

2016-09-15T15:46:00.000-07:00

SMS Remote controller is a device used to control a device remotely using SMS through GSM mobile phones. Process control equipment with a series of AVR ATTiny To SMS Remote Controller can be used to control life and death of these equipment will provide information on the status of replies to our phone in return successful command execution.

Equipment can be controlled by a series of AVR ATTiny To SMS Remote Controller include lights, water pumps, garage doors, gates and much more. AVR series ATTiny To SMS Remote controller uses the module-47 Sony ericson GM as recipient and sender of the SMS module. Then to the SMS data processor on a series of AVR ATTiny To SMS Remote controller is using AVR microcontroller ATTiny 2313.

Series AVR ATTiny To SMS Remote Controller

SMS Remote controller circuit Click to view larger.

AVR circuit this part ATTiny To SMS Remote Controller

AVR series ATTiny To SMS Remote controller uses the AVR attiny2313 with 4MHz clock frequency, GSM Module GM trnceiver 47 Sony ericson, SIM Card, 4 relays and an IC regulator. ATTiny AVR microcontroller 2313 can work well on the voltage 2.7 VDC - 5.5 VDC for working with the frequency at 10MHz bahwah.

The set of AVR ATTiny In SMS Remote Controller To make use of this power supply from the batteries 3.3 VDC. Connection using a SIM Card SIM Card Holder which is connected to the module GM-47, AVR series ATTiny To SMS Remote Controller works with communication between AVR ATTiny and GM-47 module at 9600bps. In a series of AVR ATTiny To SMS Remote controller is equipped with LED D6 as an indicator of the data interconnect GM-47 module with cellular operators where this LED will light continuously when not apat network and will be lit by flashes when a signal from the operator.

Specifications AVR series ATTiny To SMS Remote Controller

4 Relay for ON / OFF electronic devices
8 input lines for reading in a normal switching
LED indicators signal operator
SMS command with password, so only the owner can operate

Control Relay Circuit with 9 Second

2016-09-15T15:45:00.000-07:00

See figure below its Control Relay Circuit Schematics.

8 to 18 volts TDA2005 Power Amplifier

2016-09-15T15:44:00.000-07:00

This time, there is a circuit of audio amplifer 20W as well, but using IC TDA 2005 as a series of his base amplifier. The circuit of 2x20 Watt Audio Power Amplifier using TDA2005 can you see in the picture below.

Technical Data:

Performance of TDA2005M: (for this circuit); At 4.14 V supply voltage: 2 x 20 watts (stereo) into 4 Ohms.

Distortion: Approx. 0.2% at 4 Watts into 4 ohm load.
Frequency Range: Approx. 20 Hz to 22 KHz.
Input Sensitivity: Approx. maximum 150 mV rms. .
Power supply: + 8 to 18 volts, approx. 3.5 Amps maximum per channel.

source [link]

Controlling switch with relay driver

2016-09-15T15:43:00.001-07:00

The circuit above is a circuit of drivers to control high voltage using the relay. Relay is controlled by an NPN transistor , its that works on 5V voltage and has diode in it, if the relay does not have s diode should be given with diode 1N4007 . Pin relay to move the switch connected to V+ 5V and other is connected from driver NPN transistor , the base od the transistor may have input such us from circuit of infrared to control the distance, or with some other input.

After the transistor was input and the collector had output a voltage of the switch relay will work, and voltage that in switch relay ready to use. To cut off switch eliminates enough voltage input at the base transistor , the collector will not remove the voltage , and switch are automatically disconnected.

High temperature protector with IC 3584

2016-09-15T15:43:00.000-07:00

IC 3584 has thermal protection or voltage automatically shutdown when the temperature at IC exceed 150 degrees or more. You can operate this circuit at the transistor or IC heatsing, if a transistor or IC had exceeded the limit of the heat circuit automatically shutdown.

How to use a thermal shutdown circuit above that is first given a circuit of voltage V+,V-,and ground , the given a voltage Vin to be created automatically shutdown if the temperature is high , and the output is inserted in the circuit of an amplifier or other. Then IC embedded in the heatsing or case, which if too hot will shutdown alone. If the circuit already decided voltage, the voltage will re-connect if the temperature returns to normal.

Modular Headphone Amplifier

2016-09-15T15:42:00.000-07:00

140mW into 32 Ohm loads, Ultra-low Distortion

Those wanting private listening to their music program should add this Headphone Amplifier to the Modular Preamplifier chain. The circuit was kept as simple as possible compatibly with a High Quality performance. This goal was achieved by using two NE5532 Op-Amps in a circuit where IC1B is the "master" amplifier wired in the common non-inverting configuration already used in the Control Center Line amplifier. IC1A is the "slave" amplifier and is configured as a unity-gain buffer: parallel amplifiers increase output current capability of the circuit. Two Headphone outputs are provided by J3 and J4. The ac gain of the amplifier was kept deliberately low because this module is intended to be connected after the Control Center module, which provides the gain sufficient to drive the power amplifier.

If you intend to use this Headphone Amplifier as a stand-alone device, a higher ac gain could be necessary in order to cope with a CD player or Tuner output. This is accomplished by lowering the value of R1 to 1K5. In this way an ac gain of 9 is obtained, more than sufficient for the purpose. Contrary to the two 15V positive and negative regulator ICs used in other modules of this preamp, two 9V devices were employed instead. This because the NE5532 automatically limits its output voltage into very low loads as 32 Ohm in such a way that the output amplitude of the amplified signal remains the same, either the circuit is powered at ±9V or ±15V. The choice of a ±9V supply allows less power dissipation and better performance of the amplifier close to the clipping point.

The input socket of this amplifier must be connected to the Main Out socket of the Control Center Module. As this output is usually reserved to drive the power amplifier, a second socket (J2) wired in parallel to J1 is provided for this purpose. As with the other modules of this series, each electronic board can be fitted into a standard enclosure: Hammond extruded aluminum cases are well suited to host the boards of this preamp. In particular, the cases sized 16 x 10.3 x 5.3 cm or 22 x 10.3 x 5.3 cm have a very good look when stacked. See below an example of the possible arrangement of the front and rear panels of this module.

Modular Headphone Amplifier Schematic

Parts:

P1______________47K Log. Potentiometer (twin concentric-spindle dual gang for stereo)

R1_______________4K7 1/4W Resistor

R2______________12K 1/4W Resistor

R3,R4___________33R 1/4W Resistors

R5,R6____________4R7 1/4W Resistors

C1_______________1µF 63V Polyester Capacitor

C2,C5__________100nF 63V Polyester Capacitors

C3,C6___________22µF 25V Electrolytic Capacitors

C4,C7_________2200µF 25V Electrolytic Capacitors

IC1__________NE5532 Low noise Dual Op-amp

IC2___________78L09 9V 100mA Positive Regulator IC

IC3___________79L09 9V 100mA Negative Regulator IC

D1,D2________1N4002 200V 1A Diodes

J1,J2__________RCA audio input sockets

J3,J4__________6mm. or 3mm. Stereo Jack sockets

J5_____________Mini DC Power Socket

Notes:

The circuit diagram shows the Left channel only and the power supply.

Some parts are in common to both channels and must not be doubled. These parts are: P1 (if a twin concentric-spindle dual gang potentiometer is used), IC2, IC3, C2, C3, C4, C5, C6, C7, D1, D2, J3, J4 and J5.

This module requires an external 15 - 18V ac (100mA minimum) Power Supply Adaptor.

Technical data:

Output power (1KHz sinewave):

32 Ohm: 140mW RMS

Sensitivity:

275mV input for 1V RMS output into 32 Ohm load (31mW)

584mV input for 2.12V RMS output into 32 Ohm load (140mW)

Frequency response @ 2V RMS:

Flat from 15Hz to 23KHz

Total harmonic distortion into 32 Ohm load @ 1KHz:

1V RMS and 2V RMS 0.0012%

Total harmonic distortion into 32 Ohm load @ 10KHz:

1V RMS and 2V RMS 0.0008%

Source : Modular Headphone Amplifier

Amplifier 200W 2SJ201 2SK1530

2016-09-15T15:41:00.000-07:00

Aussieamps nxV200 MOSFET with the V-Fet 2SJ201 2SK1530 pair modules Aussieamps compact and powerful amplifiers with a craftsman to two amps for stereo bi-amping his large two-way speakers were purchased to build. He approached me, power supplies, design, assemble and deliver housing.

I modulised construction of: mounting the amplifier modules to the heat sink, the construction of the CCTS rectifier. on a strip of day, the Assembly speaker binding posts, captured power cord, fuse, on / off switch and input jacks on the rear panel of the amplifier and the installation of the transformer and large capacitors (20 uf 000 by rail).

Aussieamps nxV200 V-Fet Amplifier 200W 2SJ201 2SK1530 compact and powerful. It took two days just to marking and drilling of the case and HS do. And four days to assemble the first amplifier. The second amplifier just two days. Oxygen-free copper wire was used for the connection and the son of the signal. Brass cones were attached to the feet, and the case is heavy gauge steel.

Rangkaian amplifier

2016-09-12T17:00:00.000-07:00

Technical information

Datasheet IC 5G37

Vcc = 6-12 V

Pout = 0,4 W

RL = 8 Ohm

Ft = 40-17 Khz

Icco = 15 mA

Package = TABS1-14

Manufactered = China

12V to 220V 500W Inverter Schematic

2015-12-14T05:59:00.001-08:00

Inverter circuit is very useful equipment that can convert low voltage from the high voltage DC source to AC. The most common inverter circuit is 12V to 220V inverter. Maybe it is because batteries generally have a voltage of 12V. This inverter circuit typically draws current from the battery 12 DC. These batteries must be able to provide a large enough current flow. This current is then converted into an alternative 220VAC square wave form so that we could receipts electrical equipment that works on 220V from 12V source.

An inverter circuit included in the category of devices is expensive, so many people do not have enough even if they need it. nah ... in this post I will show anada 500W inverter circuit are quite simple but actually able to work well, if you are interested I think this circuit is quite easy for the raft, but before you start to assemble, I want tell you that this circuit involves 500W 220VAC and can be fatal. You have to be careful and Salvation prioritize work before starting to assemble this circuit. We recommend using protective gloves electricity and try not to play with the inverter circuit if you still lay with electricity.

Auto Remote Car Rear View Mirrors

2015-12-12T02:56:00.000-08:00

Description :

S1 = output from open/close central door lock
S2 = output from open/close central door lock
D1 = 1N4007
D2 = 1N4007
C1 = 2200uf/35v
C2 = 2200uf/35v
RY1 = Relay SPDT
RY2 = Relay SPDT
M1 = Electric Rear View Mirror Motor

note: you can parallel from left to right rear view mirror
Enjoy it