Resistor color code and how it works
Let me tell you about resistor color code and how it works. We often look at a lot of resistors in many electronic circuits. Do you know how to use…
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April 2, 2019
How to test a diode without meter
This Diode tester circuit can check the diode the good or bad and also can indicate its polarity. using op-amp 741IC and LED for display. [...]
March 30, 2019
Transistor equalizer circuit diagram
This is a transistor equalizer circuit. We use it for controlling the audio frequency. Because some kinds of audio frequency response are not smooth. It helps a frequency offset in a tone control…
March 27, 2019
3 Tone control circuits using op amp NE5532
These are Tone control circuit using op amp - NE5532 or 4558 IC as low noise, with PCB layout, can adjust sound frequency and tone bass, treble, mid and..
March 26, 2019
Simple non-contact voltage tester using transistors
This is Simple non-contact voltage tester using transistors next one circuit that use all transistor as main,it is cheap and easily build. Which many friends likeNon contact AC Detector Voltage. It use CD4060 as main
March 25, 2019
5-30 minuts timer circuit using IC 555
This is timer circuit uses a 555 IC timer. it small,compact,portable. For the snooze alarm by buzzer when some 5 to 30 minutes. It make easy with pcb layout
March 24, 2019
Top Power supply circuit diagram
If you are looking for a power supply circuit. Here may be the choice you need. over 150+circuits with PCB and easy to build, low price for a beginner.
March 22, 2019