555 practical DC stepless dimmer circuit diagram
Source: InternetPublisher:他们逼我做卧底 Keywords: Stepless dimming circuit diagram dimmer Updated: 2021/04/15
The circuit is shown in the figure, and the dimmer is composed of 555 as the core. 555 and R1, RP, R2, C1 form an astable multivibrator. The oscillation frequency is f=1.44/(R1+RP+R2)C1, which is about 650Hz. The duty cycle can be changed by adjusting RP, which can be changed from From 4.5% to 95.5%, the brightness of the lamp changes in a wide range, achieving stepless dimming .
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