power supplies & cmos a quirky relationship

richardc64 · Posted: Thu May 24, 2012 3:49 pm Post subject:

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What a sloppy schematic drawn in Paint might look like

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JingleJoe · Posted: Thu May 24, 2012 4:11 pm Post subject:

Do you see now, do you!?

tony void · Joined: Apr 26, 2011 Posts: 40 Location: Parma, Ohio

well should I slice a tomAto or should I slice a tomAHto
should we use eagle or MS paint
questions that will plague mankind till our extinction Rolling Eyes

wouldn't be a proper message board without a good flame war Twisted Evil

back to our regularly scheduled program.
my problem is solved cheers

or in other words I've successfully extracted my cranium from my anus Embarassed

after I had a few beers this evening (Great Lakes Dortmunder) I sat down to DRAW Laughing

my schemo by hand and thats when I discovered my error.
You see here, even though I had a 1K load resistor on my outputs I stupidly had my LEDs wired to ground in parallel to the 1K load. So it made the LOAD resistor void (thus my infamous moniker rings true again - but thats another story).
so yes the chips were drawing too much current and then "locking up" Rolling Eyes

which is why they ran fine on 4V and no more (the clocks via 40106 would lock up when V was over 8V because they were hooked up to these little current gluttons I reckon)
So now that I have 1Ks BEFORE the LEDs to ground its all working fine up to 15V!

sorry for all the upheaval Mad

And if any of you are ever in the greater Cleveland Ohio area look me up or PM me and I will buy you an awesome micro brew (or other fancy beverage) for your trouble Very Happy

as well as bend your ear with more humorous stories of my mishappening life (like how I got my dorky name) and well all have another laugh. Laughing

-----I'm going to the corner now to think about what I've done Embarassed

DGTom · Posted: Fri May 25, 2012 1:42 am Post subject:

awesome man! amazing what a beer or three can do to realign the way you look at a problem Very Happy

I'm really glad the mystery is solved, nevermind the drama, I was really curious to see what was the cause of the problem with your CMOS. Now they are behaving you can get on with the task at hand; abusing them!!

JingleJoe · Posted: Fri May 25, 2012 3:14 am Post subject:

Draal · Posted: Fri May 25, 2012 4:12 am Post subject:

Glad you found the trouble bro. I'm trouble shooting a faulty module myself and I' sure it'll come down to some goof on my part. My two kids leave me pretty brain dead by the end of the day; just the right time for soldering eh?