Reconstruction of street lamp control circuit with sound and light control switch

At present, the control circuits of street lamps, floodlights, spotlights and other lighting equipment are more complicated. After analyzing the commercially available sound and light control switch, the author can easily become the automatic control of night lighting equipment such as street lamps and advertising lights. The author analyzes the commercially available sound and light control switch, and the circuit is as shown in the drawing. The areas that will need to be reformed are as follows:

1. Disconnect the e pole of the transistor Q1 so that the Q1 tube no longer has a voice control function.

2. Change capacitor C1 (22μF) to 1~4.71μF (adjust the illumination delay time).

3. Change the lamp L to an AC contactor in order to control high-power lighting (depending on the power supplied). The AC contactor must be 220V.

At this point, a simple switch is completed, and the modified switch no longer has a voice control function, but only functions as a light control, a night light is on, and a daylight is off. The modified switch has been in use for a year.