On 25/11/2010 12:30, Olin Lathrop wrote: > David Duffy (AVD) wrote: >> On 25/11/2010 10:17 AM, Oli Glaser wrote: >>> All the things that have been mentioned sound plausible - also, I'd >>> maybe try pulling out the 47uF cap to see if it makes a difference. >> I will try that after the test with adding a small value cap on MCLR. > Why? It's a silly idea. There should be nothing wrong with a 47uF > electrolytic cap on the power rail. In fact it's a good idea. Don't get > sidetracked by superstition based electronics. If you're going to do tha= t, > we all know waving a dead fish over it is more effective. > I already explained why - in case there was some issue with inrush=20 current, or the power rail rising too slowly. I did not know what else=20 was going on in the circuit, complexity, exactly how it was powered etc. No superstition involved, and in any case sometimes it doesn't hurt to=20 try things, then worry about why afterwards. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .