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No need to connect this color organ to your speakers. You just set the crystal microphone near a sound source and adjut the sensitivity to get the light effect you want. Plug any light into the socket (up to 150 watts). It has a variety of uses.
Components: 10 resistors, potentiometer, 6 capacitors, diode, SCR, IC, microphone, outlet, slide switch, line cord
Principles taught: operational amplifiers, SCRs, audio control |