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Audio circuit diagrams
October 3, 2010
This simple circuit mixes two or more channels into one channel (e.g. stereo into mono). The circuit can mix as many or as few channels as you like and consume very little power. The mixer... [more]
October 3, 2010
A simple circuit, peak indicator of tops of musical signal. Each time where the level of signal exceeds the level + 4dB, turns on led D1. It is useful in each channel of console of... [more]
circuit from:http://www.extremecircuits.net/2009/07/peak-indicator.html
October 3, 2010
The main requirement was to power the circuit by means of a common, PP3 (transistor radio) alkaline battery. So, implementing a low current drawing circuit was absolutely necessary, though preserving a High Quality performance. [more]
October 3, 2010
This light-weight gadget produces an adjustable gain on sounds picked up from the built-in high-sensitivity condenser microphone. So you can hear what you have been missing. With a 6V (4×1.5V) battery, it produces good results.... [more]
circuit from:http://www.extremecircuits.net/2010/05/spy-ear.html
October 1, 2010
Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals. This design should fulfil their... [more]
circuit from:http://www.extremecircuits.net/2009/08/three-channel-audio-mixer-circuit.html
September 26, 2010
This module can be a necessary addition to the Modular Preamplifier Control Center when more than two sources need to be connected to the preamplifier chain. Four high level inputs can be selected by means... [more]
circuit from:http://www.extremecircuits.net/2010/03/four-high-level-inputs-double-bar.html
September 26, 2010
In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for... [more]
circuit from:http://www.extremecircuits.net/2009/07/phono-preamplifier.html
September 26, 2010
This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently... [more]
circuit from:http://www.extremecircuits.net/2009/07/stereo-preamplifier-with-bass-boost.html
September 26, 2010
This circuit is mainly intended to provide common home stereo amplifiers with a microphone input. The battery supply is a good compromise: in this manner the input circuit is free from mains low frequency hum... [more]
circuit from:http://www.extremecircuits.net/2009/12/portable-microphone-preamplifier.html
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