Simple color organ

Posted on Jun 18, 2012

Transformer Tl can be any matching transistor type in the range of 500/500 to 2500/2500 ohms. No connections from the SCR or its components are connected to ground. For safety's sake, keep the 117-V line voltage from the amplifier connections— that is the reason for using Tl. To adjust, set potentiometer Rl `off` and adjust the amplifier volume control for a normal listening level.

Simple color organ
Click here to download the full size of the above Circuit.

Then adjust the potentiometer until the lamp starts to throb in step with the beat.

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