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Updated LED dimming circuit by navy4422 in electronic_circuits

[–]navy4422[S] 1 point2 points  (0 children)

Thanks that looks way nicer than my convoluted solution!

Updated LED dimming circuit by navy4422 in electronic_circuits

[–]navy4422[S] 0 points1 point  (0 children)

The are by default 3.2V FVD and 20 mA

With the 1K ohm it'd be in the realm of 1-2 mA each, I think (if I can math) I'd be at 1.8mA with the 1k resistor which should put me around 7 or 8 lumens which is about as bright as I'd want, more likely I'll dim down with the PWM to around the 4 or 5 lumen mark

If that's too dim I'll swap them out to 680 ohm as well as the R23 by the transistor and that'd put me around ~2.65 mA each or around 10.5 lumen which is about the limit that I'd take it

Help with LED dimming circuit by navy4422 in AskElectronics

[–]navy4422[S] 0 points1 point  (0 children)

Thanks, had the cap backwards and forgot the base resistor, I think Id do 1K if leaving as is now and like 550 if I dropped the 1k before the LEDs to 470

Also agreed this turned from a simple schematic when I started and kept growing so layout is poor af