Est. Budget: $50.00
Create a small board (in Eagle) that can be used by PCB manufacturer to make the boards.
It uses one AN30888A SSOP16 LED driver and ATTiny85 MCU for PWM. MCU is powered by AN30888. Components will be hand soldered so there is no need for tight tolerances. Some components do not have size specified, use common sense. Schematic is attached.
External input is by two buttons and a temperature sensor, so those need some soldering pads.
This is just a ...