I had the same problem... http://www.piclist.com/techref/postbot.asp?by=time&id=piclist\2002\03\16\192 133a&tgt=post I never got it to work...bought a Warp13a (http://www.phanderson.com/) The Warp showed that all that had been written was the fuse bits (I had been able to verify that before getting the Warp by changing to/from the internal osc. in the 628 and scoping the clock pins). The rest of the program memory, though, was blank. I have not had time to get to the bottom of the problem (and have no need to, now I have a Warp). If you get it working, I'd like to hear about it. ----- Original Message ----- From: "Ken Evans" To: Sent: Saturday, May 11, 2002 3:50 PM Subject: [PIC]:El Cheapo fails with Ledon + 16F84 Hi Everyone I have just embarked on using PICs having been a die-hard Analog guy for years (more than I care to mention !). For my sins I have got hold of Myke Predko's huge tome on the subject, partly because of the inclusion of the El Cheapo programmer (programer), and have slowly been battling my my through it. Having built the El Cheapo (and then again with the latest mods), and updated the software to 0.77, it flies through all the debug routines with ease. The problem is that when I program the 16F84 with the Ledon.hex which simulated great in MPLAB, it fails miserably in the breadboard. It does nothing in fact but show clock activity. The same hex code used with a borrowed programmer works great when plugged in to the circuit. This anonymous machine seems to read the PIC programmed on the El Cheapo as empty program space. What next ? Any help here would be greatfully received. thanks for listening Ken -- 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