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.
Schematic
PWM LED Driver Component Datasheets
- NE555 Timer IC Datasheet.
LMV358 Opamp Datasheet.
KND8103A Mosfet Datasheet
LM78L05 5V Voltage Regulator Datasheet
PCB
Variable Duty Cycle PWM LED Driver Theory of operation
It’s Tiny!
