Tag Archives: timer

Review and teardown of UV nail polish curer and PCB developer.

This unit is a very common UV nail polish curing unit available cheaply on ebay. It uses four 9W UVA tubes like the ones found in insect traps and UV exposure units. The unit has the option of continuous or timed operation with a fixed time of two minutes. I experimentally exposed a piece of […]

DIY UV-LED PCB exposure box in a scanner

This is my home made PCB UV-LED exposure box housed in an old scanner. The countdown timer is custom made using ATtiny2313 uController. The display unit is a 4 digit 7 segment display module. The firmware was written in CodeVisionAVR C compiller and the LEDs used for this project are 5mm high brightness (2000 mcds) […]