PWM LED Driver by Green Dragon

Update: I have Moved on to Microcontroller based PWM as they are 10p vs the smd 555 5p but require many fewer supporting components

The Green Dragon variable duty cycle PWM LED driver PCB based on the 555 timer IC invented in 1971 and still in production today.


PWM LED Driver Schematic
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PWM LED Driver Component Datasheets


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Variable Duty Cycle PWM LED Driver Theory of operation

Variable duty cycle PWM Dimmer theory of operation.
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It’s Tiny!

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