This is Simple Gold Detector Circuit. It uses magnet and electric to find metal and even gold. Electric goes fast back and forth. This make magnetic field in coil. When metal come close then electric changes. It is an fun project to learn about metal detector but may not that good for real treasure. Circuit […]
Simple 20 Watt Fluorescent Inverter Circuit
Imagine we have normal car battery and we want to use it for fluorescent light. But the battery voltage too low and it does not work like this. So we use special and Simple 20 Watt Fluorescent Inverter Circuit like a magic box. This box has transformer, transistor and other parts which change low voltage […]
Electronic Drums Simulator Circuit
Do anyone want to play drums but do not have full drum kit? This Electronic Drums Simulator Circuit work like small electronic drum. It uses smart parts to make drum sound like kick and snare. Sound come from electronics and not from real drum. Can make sound using things like relaxation oscillator like build and […]
PWM Motor Speed Control Circuit using Two Transistors
Resistors can help in some ways but they are not good for smoothly changing motor speed. That is why a smart PWM Motor Speed Control Circuit using Two Transistors is used. It works like a dimmer switch for the motor. We turn a knob like a potentiometer to change how much power the transistors get. […]
Microphone Preamplifier Circuit using Two Transistors
Imagine our voice is a tiny whisper going into a microphone. This Microphone Preamplifier Circuit using Two Transistors works like a small megaphone. It makes the whisper louder so the main amplifier can clearly boost our voice. Circuit Working: Parts List: Component Type Description Quantity Resistors(All resistors are 1/4 watt unless specified) 100k 1 120k […]
“Hee Haw” Siren Circuit
The “Hee Haw” Siren Circuit is a fun sound project that makes a high and low noise like “Hee Haw” instead of one long sound. It is made using simple electronic parts like resistors, capacitors and transistors or sometimes ICs. The pitch of the sound goes up and down again and again. We can find […]