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How to use the popular LM386 class AB audio amplifier IC to build a simple mono 1-watt audio amplifier. It costs less than $3 in parts! Courtesy: Afrotechmods
There are many different audio power amplifier ICs to choose from, but designing an audio power amplifier using an operational amplifier (op-amp) and bipolar transistors is quite advantageous. Compared to audio ICs, power transistors are easy to replace in case...
To design a single stage transistor amplifier, many formulae are required to calculate the various parameters such as values of resistors, coupling capacitor, bypass capacitor, power consumption, current flowing through different components and others. A good amount of time...
A tachometer is nothing but a simple electronic digital transducer. Normally, it is used for measuring the speed of a rotating shaft. The number of revolutions per minute (rpm) is valuable information for understanding any rotational system. For example,...
People in India like to chant various mantras as they believe it brings good luck, peace of mind and helps in concentration. Here we present the circuit of an electronic chanting amplifier having nine bhajans and one mantra to...
Here is a simple stereo amplifier that can be used to amplify audio from mobile devices. IC TDA2822M used in the circuit comes in an 8-pin DIP package and is readily available in the market. Stereo amplifier using TDA2822 Circuit diagram...
Here is a simple yet very useful phone broadcaster circuit which can be used to eavesdrop on a telephone conversation. The circuit can also be used as a wireless telephone amplifier. One important feature of this circuit is that the...
Audio amplifier circuits commonly use single-chip audio ICs like LM384 and LM386. These circuits look very easy to assemble but require additional components like resistors, capacitors and sometime inductors. Here we present the circuit of a single-chip 3W audio...
Portable devices like personal computers, MP3 players, sound recorders, telephones and audible sensors are frequently in need of additional stereo amplifier to produce sufficient sound. These audio amplifiers should work with batteries (4.5V, 6V, 12V, etc) and USB interfaces...
In this video tutorial, the presenter will show you how to make a basic audio amplifier with an LM386 IC to demonstrate the minimum parts needed to build a functional amplifier. Then he will be building a much better sounding...