no, if you want to do it propperly use the Australian short circut detection system. take valuablle chips off the board connect VCC to +12V gonnect gnd to gnd of a lead acid battery Caution! aim away from face. those tantalums go off like a not so small bunger when they short out inside themselvs (burnt holes 2mm deep in a nice splash pattern across by desk) Found one bit 3M away that had bounced off the desk and a wall. -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Mike Hord Sent: Thursday, 20 November 2003 10:00 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [PIC ] A dead PIC >Me too... I just fried two 18F452's today. I messed-up and laid out the >PCB with VSS connected to +5v and VDD connected to 0v... DOH!!!. For >reference, 18F452's get mildly warm when you wire them backwards, and >then go cold (I guess something burns out, fuse style?). They don't work >again afterward :-) Connect a TLC2272 op amp to +/-12V sometime and see what happens... but don't have your finger on it when you turn the power on! More appropriate to Independence Day (Bastille Day, Guy Fawkes Day, Chinese New Year, or whatever your local fireworks-oriented holiday is) than an electronics lab! Mike H. _________________________________________________________________ Set yourself up for fun at home! Get tips on home entertainment equipment, video game reviews, and more here. http://special.msn.com/home/homeent.armx -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics