Ultraviolet lamp/LED controller used for DIY PCB creation. It can be used for photoresist expositioning on both PCB sides simultaneously. Two LED channels can be enabled separately, since that everything is controlled by the firmware. Ultraviolet LED drivers and LEDs are not present on the schematics, so you can use any two drivers up to 1.5A per channel. It is due to limitaion of ULN2003 Darlington array with 500mA per channel max load. It supposed to be used in some deep box with LEDs on the both sides of it. BUTTON_1 is controlling a box case open position. It's firmware located on the GitHub repo: https://github.com/alexander-kalashnikov/exposer