On Friday 10 November 2017 16:10:30 Gene Heskett wrote: > Greetings everybody; > > I've gotten so used to mesa and it pullups on everything so that a > true signal is a grounded wire, that I wired up the switches that way > and thats all sealed up behind the switch mounting assembly. So I > look it up in my hal file to see which input is which gpio, and hook > it all up just as if I was smart enough to know what the heck I'm > doing. Signal out of the gpio is false and stays false regardless of > switch open/closed state. > > %#@^&*+)(%$# mach bob. It not only doesn't have a pullup on the input > moc's, the sonofabeech hasn't even got ground continuity from the > power ground elsewhere on the board, to the gnd next to the input > pins!!!!! > > IOW the input circuits are 100% opto isolated from the real world and > I assume one has to rig an external supply, or at the very least waste > some heat in small r's to pull them up, and short the pullup to ground > with my switches to turn them off. > > I have 3 other bobs, but I'd have to make a whole new box to house > them as they are 2 to 6x the square size of this one. > > Does anyone know the value of resistor to use as a pullup? Those are > pretty teeny little 4 pin moc's. Enough to turn them on with a fudge > factor but not enough to blow them at a 100% duty cycle? With a 5 volt > supply assumed. > > Thanks everybody. > > Cheers, Gene Heskett
With Andy recommending about 10 mills, then I'd need 390 ohm r's for current limiters. Unforch, my midden heap failed to disgorge any, let alone the 2 I'd need. I had, a year ago, a plastic baggie, quart size of the remains of several Radio Shack assortments that would have supplied that, but it and a 3 lb coffee can full of 6800 u-f, 75 volt electrolytics took a walk when I left the garage door open on a nice spring day while going after a daily paper to assuage Dee's crossword withdrawal symptoms. In nearly 28 years (3 weeks short of it, if Dee makes it till Dec 2nd, we'll have had 28 years hitched to the same wagon. And she might do it, she's feeling a lot better today) at this address and thats the 2nd time anything was stolen. A Hitachi battery powered 3/8" drill left without a trace about a decade back. But while the drill was something that could be used by most anybody, I do not have a neighbor who even knows what a resistor or capacitor IS. Basically, its a good neighborhood, with nearly everybody on a first name basis. Anyway, another ten dollar assortment will be here in about 3+ weeks I guess. No wholesalers still exist that I'm aware of without a run to Pittsburg PA, about 150 miles north of me and I can't recall their name if I ever knew it. So I'll sit and twiddle thumbs, or if I can keep my feet warm, go deer hunting when it opens up in 2 weeks. My freezer is out of venison. Gotta find out how this new 6.5 Creedmoor barrel, and Hornady 143 ELD-X bullet works on freezer filler. It punches paper rather nicely. :) Thanks Andy, for the 10 milliamp figure on IRC. 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
