40 Watt Audio Amplifier Circuit makes small sound signal big so sound come out loud from speaker. We can hear music or audio more loud with this. Main part is TDA2040 IC which is used in this easy circuit. This IC is single chip in pentawatt case and works as class AB audio amplifier. Circuit […]
Amplifier Circuits
Simple 5W Audio Power Amplifier Circuit
In this post for Simple 5W Audio Power Amplifier Circuit IC LM384 is strong amplifier chip used in basic electronics. Chip has fixed volume gain of 34 dB to make it cheap. Mic can connect easy to ground that make chip special. If chip get too hot it reduce power by itself. It also handle […]
Simple MIC Amplifier Circuit using IC LM358
Microphones can hear sound but the signal is very weak. Then this Simple MIC Amplifier Circuit using IC LM358 make signal strong. LM358 chip is cheap, easy and can work with two mic signals so people use it a lot. Audio amplifiers take weak sound signals from mic or music player and make them strong […]
Hearing Aid Circuit using 1.5V Battery
Hearing Aid Circuit using 1.5V Battery is small sound booster. It helps people with hearing loss and to hear better. It picks the weak sound and makes it louder in earphone. This circuit works with one 1.5V battery. Circuit Working: Parts List: Category Component Quantity Resistors (All resistors are 1/4 watt unless specified) 10k 2 […]
Microphone Preamplifier Circuit using Two Transistors
Imagine our voice is a tiny whisper going into a microphone. This Microphone Preamplifier Circuit using Two Transistors works like a small megaphone. It makes the whisper louder so the main amplifier can clearly boost our voice. Circuit Working: Parts List: Component Type Description Quantity Resistors(All resistors are 1/4 watt unless specified) 100k 1 120k […]
How to Convert a Speaker into a MIC Circuit
This article for How to Convert a Speaker into a MIC Circuit shows how to turn a speaker into a microphone. It uses the speaker to catch sound. The sound turns into a weak signal. A transistor circuit makes the signal stronger. The mic wont be very clear but it is a fun way to […]