By: Zeke
I’ve had a rash of such shorted FET’s lately. Of course the equipment is 15 years old, and the motors they are driving are freezing up due to lack of lubrication. Lube the motors and add fuse...
View ArticleBy: Joe
Another video Dave!! You can fix it!!! Then sell raffle tickets or auction it off..
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By: Sam Reaves
Dave, Glad to see that you are getting back to it. I would think about pulling one of the chips on the +3.3V supply. Also you have the TTI Iprobe. You should be able to trace the current and see where...
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By: swedeham
Yes f4eru I agree ,i guess i just answered what i know would have worked and he does have scopes in spades ,but he seem to use moltimeters in a big way. Let’s see what he comes up with
View ArticleBy: Ice Skate
Hi Dave, very very good video, showing pratical EE’s skills is awesome. I am awaiting the second part with some genius methods proposed in the forum’s thread to track down this short! Keep it on going...
View ArticleBy: KingS Twisted
Dave… Don’t you wish you had some cool device that could trace 11 amps of current through a circuit board. Something like a “AIM-TTi I-Prober 520 Current Probe” (EEVblog #296).
View ArticleBy: Kasper
Maybe you could spray some cold spray on the board while powering it? That should reveal any hotspots like shorted caps.
View ArticleBy: Nicholas Vinen
Or perhaps isopropyl alcohol, it should evaporate much faster when it hits something hot.
View ArticleBy: Alan
OK, I’m not really into this, but : given the fact that an ext. PSU haven’t blown anything, and given the fact that the actual current (pushed by the ext. PSU)only dropped with the time powered, I...
View ArticleBy: schen
Worst case, nastiest buggiest problem that could have happened is maybe the oscillator or some other common signal going to the four digital ICs has gone bad. Could also be a huge red herring. There...
View ArticleBy: f4eru
Good idea. The circuits may draw too much current due to non functionnal parts of the circuitry. Test to do : power the 3.3 V externally, the rest on the original supply…
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By: Francisco
Yes, there is something not right with the relay component, look around minute 12:48… I would first check that out! Thanks
View ArticleBy: xDR1TeK
Won’t powering up the 3.3v circuit, while a component is unloading its net or nodes, blow up something else?
View ArticleBy: xDR1TeK
I mean if the component were to be removed and hence unloading its nets or nodes.
View ArticleBy: Chuck
Dave Noticed you had your hands on the PCB while flexing at time 18:30ish and the edge cap read .100 ohm, this may have been you body impedance pressing on the board when you where flexing it..
View ArticleBy: Jeffrey Burgher
Today, I went to the beach with my children. I found a sea shell and gave it tomy 4 year old daughter and said “You can hear the ocean if you put this to your ear.” Sheplaced the shell to her ear and...
View ArticleBy: Mario Beul
9 Mistakes In Marco Bitran That Make You Look Dumb If you are going to exist you will probably be looking for things to do in Boston. There are lots of things that you simply should not miss while you...
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