This project uses a very old LM386 audio amplifier IC and is still one of the best beginner audio amplifier ICs for learning and DIY circuits, which increases the strength of weak audio signals with very few components, it provides enough output power to drive a small 4Ω or 8Ω speaker directly and because of […]
Amplifier Circuits
Low Cost NPN Transistor Amplifier Circuit
Electronics is very interesting and amplifier circuits are very useful, as one of the basic amplifiers is the common emitter amplifier. This circuit uses an NPN transistor to amplify a small input signal into a larger output signal; therefore, designers use this circuit in sensors, audio circuits and switching applications. In short this article explains […]
Mini Condenser Microphone Amplifier Circuit
This mini condenser microphone amplifier circuit is a low cost project that strengthens the weak signal from a condenser microphone to produce a clear output; further it improves the microphones voice signal and provides good audio gain. The circuit works with a small 9V battery and does not require an IC, so anyone can build […]
12 Watt Audio Amplifier Circuit using IC LF351
Audio amplifier is very important in sound system, as it make weak sound strong for 8Ω speaker and a 12W amplifier uses IC LF351 and push-pull transistors. This 12 Watt Audio Amplifier Circuit using IC LF351 works on ±12V power and is good for small and medium speakers. Circuit Working: Parts List: Components Values Quantity […]
Headphone Amplifier Circuit using Transistors
Headphone Amplifier Circuit using Transistors make weak sound strong so headphones work well, also this circuit is useful when sound is direct from source which is not loud or clear. In addition, in this post we will talk about small 3V transistor amplifier for better sound. Circuit Working: Parts List: Components Values Quantity Resistors (All […]
Temperature Controlled Fan Circuit for Audio Amplifiers
Amplifiers make heat when working, also too much of heat make it work bad and can die soon; therefore, this Temperature Controlled Fan Circuit for Audio Amplifiers keep amplifier cool. Fan starts only when amplifier is hot and if volume is low and less heat then fan stays OFF and saves power. Also, the circuit […]