Hacked Gadgets Forum

February 24, 2007

UV LED PCB Exposure Scanner

at 1:41 pm. Filed under Computer Hacks, Electronic Hacks

Sapa responded to this article with an example of his creative PCB exposure system made from an old computer scanner.

“I have build UV LED lightbox using old flatbed scanner and 40 Kingbright L-7113UVC LEDs. These LEDs have narrow ray (+-10 degrees), it helps to get sharp shadow on photoresist even if photomask is not cling to the PCB very tight. LEDs mounted on carriage moved by stepper motor (scanner’s mechanics reused with my own controller based on PIC12F629), so 40 LEDs are enough to expose up to A4/Letter PCBs. LEDs mounted close to each other, so it provide well distributed light even with small deepness of box. Exposure adjusted by changing linear speed of the carriage.”