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Audio devices - list of circuit diagrams
Audio levels can be monitored using a small panel meter with this circuit built from discrete components
author: Andy Collinson visits: 44 
The GEM is an audio power amplifier embodying simultaneously active Class A and Class AB output stages for 100+ Watts into a 4 ohm loudspeaker. The front end pcb will drive up to 100+W variants, or the 200+ Watts version into a 4 ohm loudspeaker load.
author: Graham Maynard visits: 41 
This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a project for the first time or soak-test a piece of equipment.
author: Ron J visits: 38 
A hifi preamplifier designed to convert high output impedance amplifiers to 600 ohm outputs
author: Graham Maynard visits: 33 
A high quality microphone preamplifier using a single power supply, suitable for dynamic or electret microphones
author: Andy Collinson visits: 33 
A 12 Volt power suppiled designed for Ron's Modular Burglar Alarm. However, being a popular supply voltage this circuit will have many other uses as well
author: Ron J visits: 31 
A low voltage preamplifier optimised for 3 Volt operation
author: Andy Collinson visits: 30 
An amplifier to drive low to medium impedance headphones built using discrete components
author: Andy Collinson visits: 30 
A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance
author: Andy Collinson visits: 30 |
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