On Friday 05 February 2016 11:52:00 Chris Albertson wrote: > A few might fail. If you were repairing TVs 20 years ago you only saw > the one in a million that failed. I'd guess a dozen of these NTC > Thermistors are in every house in the world and few people ever notice > them. > > OK, you like switches and timers. If a circuit breaker is popping > then my guess is that you might be switching an inductive load. Where > does the energy in the magnetic field (back EMF) go? Is it finding a > path through the circuit breaker? I've never tripped a breaker > with a switched circuit like that but I've have a problem with a > switched inductive load tripping GFCI protected circuits (All outdoor > and garage circuits are GFCI.) > > Look for common problems like your outlet is misfired and you are > actually switching the neutral or if this is 220 that you are using a > couple pole switch.
Actually, Chris, it was one of those names I'd love to see on the ballot, none of the above. I solved it by renameing some stuff in my main hal file so it was easier for this old fart to follow the logic, as I had found the resistor and hard switches weren't timed correctly when I checked with a scope. Jon's idea that the slow decay of my charge-pump buckets may have been half cycling the power also entered into it I believe. Anyway, after the renaming, I went down to that section of the hal file and tore out everything but the gpio setups for those two BoB pins, and reconfigured the whole thing to, when turning it on, a delay for the SSR feeding the resistor for .1 seconds. and 8 seconds later turning on the SSR feeding the toroids direct. Then at off, I killed the direct feed in .1 seconds, and the resistors feed in 2 seconds (the response time of the detectors is about 1/3 second to on, and about 3/4 second to off). So now if it half cycles going off, the resistor is already back in circuit, controlling that dc surge to a bit over 2.4 amps and no problems. The bottom line was that I had the SSR's in series before and now they are in parallel and the timing is now correct. End of problem, the resistor (a 51 ohm 200 watter) controls the half cycle dc surge if it occurs. In retrospect, I should have used a comparator/buffer so the SSR switching was instant, but this works. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
