555 practical DC stepless dimmer circuit diagram

  
Circuit shown in Figure dimmer to 555 as the core component. 555 and R1, RP, R2, C1 composition astable multivibrator, the oscillation frequency f 1.44/(R1 + RP + R2) C1, aroun
555 practical DC stepless dimmer circuit diagram - schematic

d about 650Hz, the duty cycle can be varied by adjusting the RP, from change 4.5% to 95.5%, and thus the brightness of the lamp has a wide range of changes to achieve stepless dimming.




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