SIMPLE DISCO AUTO FADE

When a DJ has to make an announcement over a record, the normal procedure is to fade out the deck, fade in the microphone, and vice versa at the end.     If this unit is used, however. the operator need only speak into the microphone, the deck being faded out automatically.     The lamp and LDR need to be taped together, preferably with black tape, to exclude light. VR 1 is used to set the brightness of the lamp.	With no signal on the input, VR1 is set for no attenuation of the music signal. When speaking at normal volume through the mic. the music should fade down until it can be heard quietly in the background.     Some microphones may not produce enough signal to do this. If this happens, a simple pre-amp can be added to the input stage, as was done in the prototype.