Simple Colour Organ

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

1. L1 can be any 10-100 Watt lamp.
2. R1 adjusts sensitivity. The greater the resistance, the less sensitive the colour organ becomes.
3. Since this project is powered by 120 VAC, it must be installed in a case.
4. You can also use the Teccor S2003LS1 SCR for SCR1. These give better sensitivity and brightness than the C106Y units.