[[Datei:LedStepUpCircuit.jpg|640px]]
== Software ==
The software is just a small Arduino file, it needs the ATtin85 hardware lib from [https://github.com/damellis/attiny/archive/master.zip here] to run on an ATtiny85. PWM is operated at 100kHz and duty cycle is adjusted adaptive in function 'regulate' according the desired brightness and the current measured. Main loop does set the brightness according first half of trimmer setting or does brightness up and down for second half of trimmer setting for a little effect.
== Download ==
All source files, schematic, Arduino code, LTSpice simulation files etc. included here: [[Datei:LEDStepUp.zip]]