Forget the boring ding dong bell! This circuit shows you how to build a doorbell that plays a little tune instead. Just touch a button and it will ring out a melody you can choose yourself. This is a fun way to add some personality to your doorway. Circuit Working: Parts List: Component Quantity Specifications […]
Audio Circuits
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Simple Siren Circuit
This article shows you how to build a circuit that makes a sound like a real siren! The sound goes up and down in pitch really fast, just like a police car or ambulance siren. This can be a fun project but remember sirens are also used for emergencies. Circuit Working: Parts List: Category Description […]
Simple FM Radio Receiver Antenna Booster Circuit
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 […]
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 […]