Do you ever get static on your favorite radio stations? This guide shows you how to build a signal booster for your FM radio antenna. Radio signals travel through the air, and sometimes they can be weak especially if you live far from the radio station. This circuit helps make those weak signals stronger so […]
Audio Circuits
Simple Electronic Stethoscope Circuit
This post explains how to build a circuit for a special type of stethoscope. Regular stethoscopes use a tube to amplify faint sounds from your body, like your heartbeat and lungs. This electronic stethoscope uses tiny electrical parts to make those sounds much louder and clearer. This can be helpful for doctors and nurses to […]
AVC Automatic Volume Control Circuit
Imagine a volume knob that adjusts itself, this circuit is just like that. It listens to the incoming sound like music or a voice and automatically turns it up or down to a comfortable level. So if the music is quiet it gets a little bit louder. And if the music is really loud it […]
Simple Infrared Wireless Headphone Circuit
This circuit shows you how to build your own wireless headphones! Instead of a wire connecting them to your device, they use invisible light signals infrared or IR to transmit the sound. This lets you move around freely while listening and you can even control them from a distance like turning up the volume or […]
Simple FM Radio Circuit
An FM radio circuit is the electronic heart of a device that can pick up FM radio waves and convert them into sound you can hear. Below are the functions of Radio, FM radio and FM vs AM. Radio: FM Radio: FM vs. AM: Circuit Working: Parts List: Component Description Quantity Resistors (1/4 watt) 10k […]
Simple Voice Recorder and Playback Circuit
Tired of expensive voice recorders? This post shows you how to build your own simple one! You can use it to record short messages for your family or friends. Just press a button to record and another button to play it back. Note: This project might be more complex than some others. What is a […]