Electronic projects circuits

Logic probe tester circuit

admin — Fri, 17 May 2013 16:24:33 +0000

They are digital logic probe circuits that you make easliy. Most digital circuits that used CMOS ICs. because I like using CMOS ICs. Because it needs a voltage of approximately 3V to 12V and the power consumption is low. If we use the battery power for longer than IC-TTL. But when problems need to Logic. We use a CMOS IC is suitable or more efficient. And in the third circuits. We use the display with sound. Is so easy to use.There are 3 circuits, as follows. (see below!) 1.Three state logic tester probe using IC-CD4001 The work of the Temple three state logic IC-CD4001 circuit be the circuit will use not gate IC in show supervision. In case of still have no input signal come in be liberate input pin of IC1/1 float keep. Which make have impedance very many, which have no LED anything shine come out. In first [...]

Random Number Generator by IC 4017 and 4011

admin — Thu, 16 May 2013 01:17:13 +0000

This be Random Number Generator Circuit there is the character is 10 LED Flasher by use IC 4017 and IC 4011 integrated circuit. For the 4017 IC is a 16-pin CMOS decade counter. It takes clock pulses from the clock input, and makes one of the ten outputs come on in sequence each time a clock pulse arrives. Usability press S1 forLED Flasherrespectively. By pressure (Close) S1 make LED all stick dim (Dimly). When liberate (open) S1 make LED stick bright at LED any one to one’s fate. Besides value expansion C1 be 4.7uF make LED flasher slow down. The detail is other invite friends see in the circuit leisurely.

LED Chaser by IC 4017 + IC 555

admin — Thu, 16 May 2013 00:50:07 +0000

I believes in that extremely amateur electronics many you, may ever build the LED flasher or light blinks or the LED Chaser prevent come to already. Today I begs for to advise the circuit LED Chaser, by have LED show 10 amounts together. blink stick bright chase go to continually. By have IC CD4017 circuits precede at drive a tube LED all. Which its work be Counter circuit good just this besides. Still have IC 555 wait for feed Clock with then can fine the speed of the winking with VR1 good easy. The detail is other see in circuit picture better. Circuit LED Chaser by IC 4017 + IC 555 4017 Led Pattern-Flasher The circuit uses a 555 timer oscillator to supply clock pulses of a variable frequency to the 4017 decade counter. The decade counter only needs to have three outputs so the fourth output goes into the [...]

10 LED Flashing using CD4017

admin — Thu, 16 May 2013 00:44:46 +0000

This the circuit light led flashing with show of 10 LED. By use integrated number circuit CD4017 perform be Decade Counter/Divider with 10 Decoded Outputs. Which it is integrated digital circuit CMOS then use the power supply about 9VDC. For a signal input continue the circuit can produce general frequency may use IC NE555 all right.

Symmetry harmonic oscillator generator

admin — Fri, 10 May 2013 05:36:50 +0000

This circuit is simple harmonic oscillator generator that easy because use three transistors as main components that In this modern era, look old-fashioned, but if you have a device in hand, should be created be used. Highlights of this circuit, not in use of the third harmonic of the crystal or is a symmetric. But the tuning because the frequency generator circuits, a commonly used tuning circuit is not a fundamental frequency generator circuits only. If you want to use a harmonic tuning circuit, to selectively took the desired harmonic out. This circuit is an stable multi vibrator Which use how to connected the crystal that Strange are connects between the emitter pin of both transistors and connected in series with a little trimmer (C5 = 40 picofarads(pF)) That trimmer is used to adjust the fundamental frequency. To become the third harmonic frequency. This circuit is designed for use with [...]

Variable zener diode circuit

admin — Fri, 22 Mar 2013 17:29:13 +0000

I used to design and calculate the value of the equipment. By false starts. Frequently have all the equipment. Except that the Zener diode can not find what you need. I tried using this way. This circuit features as zener diode voltage can be adjusted. And Zener diode features more than normal, are higher input impedance (20 to 50 ohm) Rate under the maximum load. and there is the temperature coefficient just only about -2 mV per degree celsius. Zener voltage Uz can be adjusted in the 3 to 25 volts. This circuit works. When the voltage at pin T2 base of more than 0.6 volts. T1(?BC547) conduct makes T2(BC557) conduct current according, And the voltage drop across this circuit. It can not be increased, same as a normal zener diode. This voltage zener determined by the ratio of P1/R1 and R2. When adjust the voltage Zener This circuit is [...]

Simple capacitance measurement using IC-555

admin — Sun, 17 Mar 2013 04:54:44 +0000

This circuit is used for the frequency counter as digit number display, that can measure the period.To show a capacitance value of the capacitor directly. According to circuit shown in Figure 1. Shows the using IC 555 as astable multivibrator. Period are as follows. T = 0.7 (RA +2 RB) Cx. If the capacitor is connected that not know value onto a position Cx, then the period time will alter based on the value of Cx because RA and RB are a constant value. Figure 1 Simple capacitance measurement using IC-555 If RA and RB are the appropriate period of time to read the meter, it will be the same as the capacitance of the capacitor. In with unit is picofarads, nano or microfarads. For example, suppose a meter long periods of time with 1 second. It’s meant to measure the capacity of one micro Farads. They will have all [...]

Amazon is a us new Hope.

admin — Sat, 09 Mar 2013 16:14:56 +0000

I started to study and experiment with amazon affiliate program to earn money, instead of google adsense. Over time one week I check income about 9.24$ or daily average sales of 1.32$, which may be less than the income from google adsense. However, I hope that it is an important first step.Amazon product of a lot about electronics. There are several convenient to choose. The shopping of amazon through my website, you have product is useful and exactly as your needs. I get a commission. To as revenue for development the site. Thank you very much from the mind truly.

Let’s assembly a good Elenco Digital multimeter.

admin — Wed, 06 Mar 2013 21:24:57 +0000

As before, I think a Digital multimeter is a tool that we cannot build itself. Because needs high accuracy. Must have Tools to compare more expensive. But when I saw the product Elenco also must very surprised. Here DIY Kits is a digital multimeter flagrant. There are many parts unbelievably. From a small screw knob fastener parts , the PCB layout, battery 9 vols, the leads, LCD display 3-1/2, resistors, capacitors, circuits manual, the body frame. If we build a own multimeter, it was stylized, and unique. Close your eyes, think about when friends visited at home.Tell him honestly that this is which we create own multimeter. Very proud. Matter of performance, like the meter in the market. 3-1/2 digit LCD, 18 Ranges,DC voltage ranges: 200MV, 2 volt, 20 volt, 200 volt, 1000 volt, AC Voltage ranges: 200, 750 volt, DC current RA, Transistor Test, Diode Test Elenco M-1007K DIGITAL [...]

How to repair a TV-LCD and more electronic circuits

admin — Tue, 05 Mar 2013 07:58:54 +0000

About 7 years ago I used to a TV repair shop in a small town. It are the freedom job and good income. Although I graduated in electronics. But, I can not repair the TV. At that time, I will learn short courses. Expensive and takes a long time to learn. Expensive around 199$ and takes a long time to learn around 2 month. I do not have free time. So I can not go to school. I read electronic journals Found advertised for sale a video tape series taught about a TV repair. Price set at 109$. I am think a very long. Fear that, buying it is not worth the money. But I am was determined. I bought the self study.Friends say it does not work. And the price is very expensive. I am learned that the fast and clear. I told the neighbors. I can repair the [...]