Simple Colour Organ

This is a simple, one lamp colour organ. It is far less complicated then the Three Channel Colour Organ. It is simply a lamp controlled by an SCR. It can be built in a few minutes, and combined with other circuits to make some pretty neat effects.

Schematic

Parts

Part Total Qty. Description Substitutions R1 1 500 Ohm Pot T1 1 500 Ohm/500 Ohm Matching Transformer 1K/1K Matching Transformer SCR1 1 C106Y SCR 106B, Teccor S2003LS1 L1 1 10-100 Watt Lamp MISC 1 Case, Board, Socket For L1, Line Cord Notes L1 can be any 10-100 Watt lamp. R1 adjusts sensitivity. The greater the resistance, the less sensitive the colour organ becomes. Since this project is powered by 120 VAC, it must be installed in a case. You can also use the Teccor S2003LS1 SCR for SCR1. These give better sensitivity and brightness than the C106Y units