Posted three files in Laminator Temp Control folder.
the .pbp is the code writen in MicroEngineeringLabs PicBasicPro. It can be opened in any word processor. It is for an PIC12F683 chip on the acompanying .sch and .pcb files.
the .sch is a schematic of the board
the .pcb is the board artwork
both files may be opened with the free ExpressPCB program.
http://www.expresspcb.com/ExpressPCBHtm/Free_cad_software.htmI print the bottom layer on my laser printer and use toner transfer to create a single sided board. There are no jumpers or via's on this board making it fairly simple to assemble. All the surface mount components are 1206 size, that are easily hand soldered. The PIC12F683 is socketed so it can be programmed then inserted into the board. Any SPST switch can be used. The FET transistor that drives the relay allows for a wide selection of relay coil voltages. I have used either 5vdc or 12vdc coils, the footprint is pretty standard. The unit can be run from a 12vdc wall wart or a 9vdc battery. The PM128-E is a pretty common digital panel meter. A 5 pin header is used for the switches and DPM connections. Screw terminals for relay contacts, and external LM34 connection. A standard jack for a center positive 12vdc wallwart or 9vdc battery.
Read the intro in the .pbp file for a circuit and program description.
RD