I would mount the LED inside the pen, and use the metal tube that used to house the felt/fibers as a sort of collimater and conduit, dispensing with the need for quartz crystals. "M. Adam Davis" on 10/13/2000 09:49:17 AM Please respond to pic microcontroller discussion list To: PICLIST@MITVMA.MIT.EDU cc: (bcc: Andrew Kunz/TDI_NOTES) Subject: Re: +AFs-OT+AF0- How to make PCB at home? Mike Harrison wrote: > However you can now get UV LEDs..... So all you need to do now is find an OKI LED page printer, replace the array of LEDs with the UV leds, modify the printer to accept the clearance of a pcb (maybe slow down the motors) and rip out all the toner and transfer drum stuff. Then you can pass a pre-sensitized PCB right through it, develop and etch. Could probably even make a developer rinse and etch bath system right after the printer and have PCB process nearly automatic. -Adam -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu