555 practical DC stepless dimmer circuit diagram

Posted on Mar 28, 2007

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
Click here to download the full size of the above Circuit.

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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