I need a light to wake me up since daylight savings mean the sun isn’t doing a good job. I’ve been getting some great mileage out of my LED driving circuit. Here it is again:
Only thing of note here is that I changed R3/R7 to 100R for smaller minimum pulse widths, as it’s important that the LED has a really low minimum brightness. I also made one using a FET driver but it didn’t arrive on time:
And of course the circuit is reverse polarity protected:
I also have a Yuuuge LED that takes a 0-10V analog input to control it. The minimum brightness is too high for a wakeup light but I would still like to be able to control it from the pi, so this circuit is in order:
..OK maybe I shouldn’t popular R13 like that.But the circuit works well.