No more boring ding dong bell! This Touch Controlled Musical Door Bell Circuit show how to make doorbell which play small music tune. Just press a button and it rings a melody sound which we can choose which one. This circuit is fun idea to make door more special and different. Circuit Working: Parts List: […]
Audio Circuits
Simple Siren Circuit
This Simple Siren Circuit article show how to make circuit sound like real siren! Sound goes up and down fast like police car or ambulance siren. Making this type of circuit is fun but remember siren are also used when emergency happens. Circuit Working: Parts List: Category Description Quantity Resistors 47k 1/4 watt 2 Capacitors […]
Simple FM Radio Receiver Antenna Booster Circuit
Do anyone have a favorite radio station with static sometimes? This Simple FM Radio Receiver Antenna Booster Circuit talks about how to make signal booster for FM antenna on radio. Sometimes radio signal are not strong especially if person live far from radio station. This small circuit makes weak signal stronger so radio can catch […]
Simple Electronic Stethoscope Circuit
This Simple Electronic Stethoscope Circuit talks about how to make one type of stethoscope circuit. Normal stethoscope uses tube to listen small sound from body like heart and lung. This electronic stethoscope uses small electric parts to make sound more clear and loud. It help doctors and nurses hear better what happen inside the body. […]
AVC Automatic Volume Control Circuit
This AVC Automatic Volume Control Circuit work like auto volume knob. It hears the sound coming like music or talking and then change volume by itself. If music is played low then it makes little louder. If music is very loud then makes it little quiet. This helps because there is no need to change […]
Infrared Wireless Headphone Circuit
Anyone can make its own wireless headphones using this Infrared Wireless Headphone Circuit. It sends sound by using infrared light but not with wire. So we can move around easily while listening. We can also control it from far like change volume or songs. What is a Infrared Headphones Receiver Circuit: Main job of infrared […]