Or...have a connector to give the board a safe DC supply to program the chip? Then disconnect before attaching back to mains. I just use the ICD2 and power from it, just to program the part. PAUL James wrote: Why not use optoisolators in each of the programming lines. That way, no mains power could enter the programmer, computer or operator. Regards, Jim -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Steve Baldwin Sent: Friday, August 31, 2007 4:30 PM To: Microcontroller discussion list - Public. Subject: [PIC] Standalone (pushbutton) programmer I'm looking for a standalone, pushbutton programmer for the 16HV610, or perhaps something that's well on the way. The product is a dense mains powered board and pretty much any production fault could potentially put mains onto the programmer, so I'd rather sacrifice a few programmers than have an external PC and sacrifice a few operators. There are a few options that go some of the way like Olin's USBProg or ICD2, but I'd still have to add on a board to send commands, data, etc. In which case, it's a similar effort to build a programmer. Steve. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --------------------------------- Need a vacation? Get great deals to amazing places on Yahoo! Travel. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist