Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the music. This adjustment of the circuit is made by P1. Any 12 V up to 1 A lamp can be used. Q2 must be mounted on a heatsink. Transformer is any type with a primary of 110 or 220 V and secondary winding of 100 to 500 mA, 6 to 12 V. R1 depends on the power of the amplifier. A 47 ohm resistor can be used with powers up to 10 W and a 100 ohm for power up to 50 W.
12 V Rhythmic Lamp
