The following is an introduction and description of the simple sound control circuit diagram: on the basis of the manual dimming circuit, the potentiometer RP can be used as a photocoupler for the color tone control, as shown in the figure, when the radio or recorder The audio signal is sent to the input of the optocoupler, the size of the audio signal changes, the conduction angle of the thyristor is changed, and the light flashes with the sound. Adjust the RP to change the sensitivity of the sound control.
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