Operational amplifiers (opamps for short) are a fantastic analogue circuit building block. While they were originally used for mathematical operations (hence the name) in early analogue computers, they are now mainly used for audio applications. What is an opamp? An op-amp or operational amplifier to be exact is quite literally…
Year: 2008
Disco Lights
What does it do? The Disco Lights project is what you get when you combine the fantastic beat detection circuitry of my ever popular beat triggered strobe light with coloured halogen lamps! In other words, four coloured lights flash in a variety of patterns in time with your music. Some…
Karaoke Circuit
What is it? The simple karaoke circuit takes a stereo line level audio signal from a CD player, mp3 player or similar and, in the case of most music recorded in the last 2 or 3 decades, significantly reduces the volume of the vocals without removing much of the accompaniment. …
Beat triggered strobe light
Due to the substantial improvements in LED technology over the years, this ancient (2005) project is outdated. High voltage Xenon flash tube based strobe lights are simply not relevant in DIY applications any more when one can now purchase LED modules really cheaply that are actually a lot brighter than tube…