Thursday, December 9, 2021
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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...
Here is a simple AF amplifier project based on TBA820M IC. This amplifier can deliver two-watt output power with 8-ohm speaker using a 12V power supply. A 3-16V battery or an AC/DC adaptor can be used to power this circuit....
These days there a lot of audio power amplifiers in integrated circuits (ICs). But it is still interesting to produce audio power amplifiers with operational amplifiers (OAs) and with output power bipolar transistors. Some of the reasons for that...
This article describes a low-cost low noise audio distribution amplifier based on hybrid or mixed technology. Input to the amplifier is from low-noise, high-gain npn transistor. Output buffers are implemented with voltage followers using an operational amplifier (op-amp). The combination...
LM1875 is a low cost and very popular and useful integrated circuit (IC). It is designed to be stable with gain higher than ten. Its main application is stand alone audio power amplifier but with two or more additional...
Listening to music on a self-made system is great. Good-quality audio amplifier circuits can be constructed with minimum components. Described here is an LME49710 based audio amplifier. Author’s prototype is shown in Fig. 1. LME49710 based audio amplifier circuit As shown...
Here is a circuit for a simple but useful low-cost quadraphonic (having four channels) amplifier. It can be used for experiments in open or closed spaces, including small home labs and studios. It can also be used for the...
Sometimes we need configurable multichannel amplifiers for experiments or for use in offices or schools. Here is a multi mode audio amplifier circuit based on TDA1554Q, configured for multi-mode function with four channel outputs. Multi mode audio amplifier circuit The circuit...