Audio Circuits

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 […]

This Digital Volume Controller Circuit talks about special type of electronic volume control. It does not uses normal knob but it uses an electronic parts. Normal volume knob uses resistor but this one uses small computer chip to control sound level. It gives more function and also with more correctly. Circuit Working: Parts List: Category […]

This Variable Notch Filter Circuit have a special filter. It can change to remove some sound frequency. We can adjust it how we need and that make it useful. This filter is also call band reject filter or band stop filter. It mostly removes or make small certain noise in one range. High and low […]