Matthew Mucker wrote: > !MCLR is tied to +5V. I only have the condensed data sheets that Parallax > sends with their stuff, so I don't really know all that I should here. Ok, then all you probably need is to take a 100K resistor from VCC, paralleled with a diode, connected to a 1uF tantalum cap to ground. Connect /MCLR to the junction, e.g. +| | VCC--+--/\/\/\/\/\---+-----| |-----GND | | | | | |/ | ------| --------+ |\ | /MCLR The diode can be a 1N914 or equivalent. You should find this will give a solid power-on reset. It won't give total brownout protection, but it should be quite good enough. The diode is reverse-biased while operating, but dischages the cap quickly when power is removed. Clyde -- Clyde Smith-Stubbs | HI-TECH Software, | Voice: +61 7 3354 2411 clyde@hitech.com.au | P.O. Box 103, Alderley, | Fax: +61 7 3354 2422 http://www.hitech.com.au | QLD, 4051, AUSTRALIA. | --------------------------------------------------------------------------- For info on the World's best C cross compilers for embedded systems, point your WWW browser at http://www.hitech.com.au, or email info@hitech.com.au