This article for Simple Adjustable Oscillator Circuit using Two Transistors show how to make small sound circuit using only two transistors! When we turn the knob the sound goes high like beep or low like growl. We can use four AA battery or small wall power to run this circuit. Try this easy experiment to […]
Audio Circuits
Simple LM386 Audio Amplifier Circuit
In this Simple LM386 Audio Amplifier Circuit we use one popular chip called LM386 to make small sound amplifier circuit. It does not cost much and easy to make and can make speaker or music player sound louder. It is not very powerful for big show but good for small projects. And also is good […]
Simple Piezo Buzzer Circuit
This Simple Piezo Buzzer Circuit make sound in new way. It is easy to make and need only few parts like: It make high sound like a whistle. This circuit is special because coil makes the sound to keep going and is not like other circuit with resistor and capacitor only. What is a Piezo […]
Simple Li-Fi Transmitter Receiver Circuit
Think internet is like a light and not a radio wave. Simple Li-Fi Transmitter Receiver Circuit do the same thing like that. This article tell how to make simple Li-Fi system to send and get data using light. Transmitter uses bright LED and normal transistor to send signal. Receiver catch signal with light sensor like […]
Simple MIC Preamplifier Circuit
This is small and simple MIC preamplifier circuit using op-amp IC LM358 and it uses op-amp to make weak sound from MIC more strong, so it boosts low audio signal into stronger one. Also, the circuit is good to record voice or connect to speaker and it is easy to make with not many parts. […]
TV, Video Transmitter Circuit
This is one TV, Video Transmitter Circuit and it can send video from DVD, camera or other device to old TV in our house. We do not need big parts or hard things, just small circuit and little care is all we need, so this type of circuit is good for fun and also for […]