Amplifiers circuit diagrams

Guitar Control

Stand-alone, 9V battery powered unit. Three-level input selector, three-band tone control

60W Guitar Amplifier

Bass, Treble, Harmonic modifier and Brightness controls. Output power: 40W into 8 Ohm and 60W into 4 Ohm loads

Amp with Tone Controls & Soft Switching

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.

15 Watt Amplifier

A 15 watt amplifier made using discrete components. Sergio designed this circuit for his Electronics Level II course.

Quadraphonic Amplifier

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.

Vinyl Pre-Amplifier

For those who might wish to 'save' to their computer hard-drive a digital copy of their own vinyl record collection, I have redrawn my 1975 vinyl pre-amplifier circuit. It remains capable of optimising disc playback and offers features still not repeated today.

Guitar Amplifier

10W Old-Style ultra-compact Combo. Two inputs - Overdrive - Treble-enhancement

TDA2030 8w Amplifier

An 8 watt amplifier made with the TDA2030 IC. Built two such units for a stereo amplifier.

60W Bass Amplifier

Low-cut and Bass controls. Output power: 40W into 8 Ohm and 60W into 4 Ohm loads

150W MP3 Car Amplifier

LF353 Wide Bandwidth Dual JFET Input Operational Amplifier