Click Image to Enlarge This circuit has only two transistors, two capacitors and four resistors. That also means it consumes very lit...

Spy Bug Fm Transmitter Click Image to Enlarge This fm wireless transmitter should only be used for educational purposes. Regular ...

5V Power Supply Click Image to Enlarge A voltage regulator is used to produce a constant linear output voltage. It’s generally u...

 LA4440 IC Amplifier  This is the circuit of amplifier using IC LA4440. The amplifier circuit uses very less components but a very...

LM386 IC Audio Amplifier All that is needed to build an audio amp are a few external components. I used sop-8 type ic. It is well...

4026 IC  7 Segment Counter  This circuit diagram is a simple digital revolution counter. It can be used to count the rotation of a ma...

FM transmitter 800m (2400ft)  This fm wireless transmitter should only be used for educational purposes. Regular transmission us...