Dynamic microphones are strong, last long and work well with loud sounds, so people use them a lot in sound systems and recording. But their signal is weak. So they need a preamp to make sound stronger. This Dynamic Microphone Preamplifier Circuit using IC uA739 is a preamp for dynamic mics. It uses µA739 op-amp […]
Audio Circuits
Active Crossover Circuit using IC LM324
Active Crossover Circuit using IC LM324 important project for audio. It split audio signal into parts like low, mid and high. Each part go to right speaker with woofer for bass and tweeter for high. This make sound better and system works well. IC LM324 op-amp is used a lot. It is cheap, low power […]
Simple Arduino FM Receiver Circuit
This project uses Arduino Uno to make Simple Arduino FM Receiver Circuit. Main part is RDA5807M FM radio module. It get FM signal and changes to audio sound. Sound goes through 7809 IC to make louder and then comes out from 3.5mm audio jack. We can listen FM stations and learn basic digital electronics and […]
Simple FM Radio Jammer Circuit
Simple FM Radio Jammer Circuit make signal to block normal FM radio. It send noise or fake signal on same frequency so real FM signal get disturbed. Main parts: Transistor work like oscillator and make RF signal. Coil and capacitor set the frequency of this signal. Change trimmer capacitor to change jammer frequency inside FM […]
50 Watts Audio Amplifier Circuit
To get good sound with less power and work for long time is very important in audio amplifier. This 50 Watts Audio Amplifier Circuit give strong sound and work well. It uses both MOSFET and BJT to make clear sound and can run 8 ohm speaker with full 50 watt power. Circuit Working: Parts List: […]
10 Watts MOSFET Audio Amplifier Circuit
This 10 Watts MOSFET Audio Amplifier Circuit give about 10W power. It good for playing sound on low impedance speaker. It use two BC547 transistors to drive signal and IRF540 with IRF9540 MOSFETs for output power. BJT transistors make signal strong and MOSFETs give good power. Together they work well for audio amp. Circuit also […]