Audio Circuits

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. […]

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 […]

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 […]

FM Radio Circuit is an electric brain for the machine. FM radio circuit is small electric system. It catches FM radio waves and changes to sound we can hear. This circuit use parts like antenna, mic, speaker, and some wires which is used in many radios to listen music or voice. Below are few type […]

Anyone tired of buying expensive voice recorder? This Voice Recorder and Playback Circuit show how to make easy one at home! We can use it to record small message for family or friend. Just press two button one for record and other one to listen. Note: This project is little bit hard than other one. […]

This Very Low Frequency (VLF) Converter Circuit talks about one circuit. It can catch very low radio waves VLF from air and make them into sound for hearing. Normal radios do not get these VLF waves but they only work with higher waves. But this circuit is different it can find low waves and change […]