Monday, January 24, 2011

Stereo Tone Control Circuit Based LM1036N

The following circuit is a Stereo Tone Control Circuit which build based LM1036N.

Stereo Tone Control Circuit Based LM1036N

The LM1036 works as a DC controlled tone (bass/treble), volume and balance circuit for stereo audio purposes in car radio, TV and audio systems. An extra control input will allow loudness compensation to be simply effected. Four control inputs provide control of the bass, treble, balance and volume capabilities through application of DC voltages from a remote control system or, additionally, from four potentiometers that might be biased from a zener regulated supply given on the circuit. Each tone response is defined by a single capacitor selected to give the desired characteristic.

Circuit Features:

Large volume control range, 75 dB typical
Wide power supply voltage range of 9V to 16V
Channel separation, 75 dB typical
Tone control, 15 dB typical
High signal to noise, 80 dB typical for an input level of 0.3 Vrms
Low distortion, 0.06% typical for an input level of 0.3 Vrms
Few outside parts needed

Note: Vcc can be anything between 9V to 16V and also the output capacitors are 10uF/25V electrolytic.

About Audio Amplifier
An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.

The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels.

While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at

This is a video tutorial about how to a very simple audio amplifier based on the LM386 amplifier chip. It can be built for less than $20 (or might be less than $8 in some countries) and used to amplify any low level audio signal including a guitar, bass or mp3 player.

Watch the video:

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