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Audio devices - list of circuit diagrams
A variable notch filter with both high and low pass filters
author: Andy Collinson visits: 174 
A switched timer with equal make and equal space periods timing adjustable from over 6 minutes to 38 minutes
author: Andy Collinson visits: 70 
A 15 watt amplifier made using discrete components
author: Sergio Garcia visits: 70 
Built around an LM380, this amplifier includes tone controls and electronic "soft switching". The soft switching circuitry ensures power is built up gradually eliminating the dc thump.
author: Andy Collinson visits: 63 
This circuit uses two quad op-amps to form an eight LED audio level meter
author: Matthew Hewson visits: 62 
Using a single op-amp this easy to make equalizer offers three ranges, low frequency,mid frequency,and high.
author: visits: 54 
A 24 Watt Class A Amplifier made from discrete semiconductors, built and tested by Marc Klynhans from South Africa
author: Marc Klynhans visits: 52 
This is a four channel amplifier ideally suited for use with quadraphonic equipment such as a Sound Blaster Live card. There is no volume control,audio levels being directly controlled from the sound card itself.
author: visits: 48 
In its simplest form, a voice-over unit is just a microphone and change-over switch feeding an amplifier, the output from the microphone having priority over the amplifiers audio signal when the "push-to-talk" switch is pressed. In this circuit, a preamplifier immediately follows the microphone and is designed to be used some distance away from the main amplifier
author: visits: 47 |
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