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Anyone ever kill anything by electrostatic discharge?

JamieDoesStuff

Experienced Member
Joined
Aug 9, 2021
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116
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Novi Sad, Serbia
Pretty much the question in title. I've been working on computers ungrounded for years and nothing bad ever happened because of it. I got reminded about its existence by a Compaq service manual, there's a table on how much static is generated by different events performed by a person and what not.
 
Don't tell Daver2 but I never bothered with the antistatic precautions working on our companies Intel Multibus systems and never had a problem, but I would not dare touch the Honeywell DPS6's without it.

Practically, I think I killed some 4116 RAM's when cleaning with a nylon brush (daft, yes)
 
In 1977, I had a professor who built an air track (used for exploring friction/motion) with some added LEDs to show the motion. He was showing it off at the American Physical Society at the winter meeting in February in Chicago. The carpet in the hotel was wool. Walking across the hall, he touched it, and all the LED drivers went kaput. It was a this meeting that NASA unveiled some of the results from the Mars Viking mission, and that meeting room was overfilled.
 
Should we use ESD bracelets when working on electronics? There are several aspects to consider.

First and foremost, we are "amateurs" (with all due respect), and this recommendation primarily comes from the professional world. If you're handling ESD-sensitive devices for 8 hours a day, the chances of something deteriorating are significantly higher.

Then, there’s the environment. A corporate setting often includes carpets, rolling chairs, and a lot of computers, lights and test equipment running throughout the day, which accumulates electrical charges.

Finally, the test equipment itself has evolved—modern devices likely have fewer emissions, less exposed metal, etc.
Speaking of which, I often see people on YouTube who are overly paranoid about ESD but use USB soldering irons, which, in my opinion, are likely candidates for building up an electric charge at the tip (as with anything with a switching psu). That said, this is just a hunch, as I haven’t conducted any accurate measurements to confirm. Personally, I use a properly grounded JBC soldering station.

All in all, using an ESD bracelet is a perfectly valid recommendation and remains common in many professional settings. However, for an enthusiast soldering a couple of chips once a year, it’s probably overkill. As for me, I work on an ESD mat (properly connected to the mains earth/ground with the correct resistor), but I very rarely use an ESD bracelet. To me, the ESD mat provides a layer of safety without overcomplicating things. Just my 2 cents.
 
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I have personally 'killed' two chips at two different times with ESD. One was a WD2010 controller chip I was installing in my Tandy 6000's internal (or 'Type 4') hard disk controller to get additional cylinders, and the other was a 41256 DRAM when those were running >$20 each in the late 80's. I felt the spark on the 41256. Pulled working; put right back in and it failed (EDIT: catastrophically failed at that, releasing the magic smoke).

The WD2010 worked fine on the ISA controller it was pulled from, but then wouldn't work in the T6K. When I put it back in the ISA controller, it didn't work anymore. Another WD2010 from a second ISA controller (had to desolder that one) worked fine in the T6K. I wanted to get the extra 200 cylinders from the XT2190 I was trying to to use.

For $dayjob I use full ESD procedures; for my own stuff, I'll use a subset of those procedures, where the size of the subset is directly proportional to the rarity or cost of the chip. Most of the time I'll just manually ground myself with one hand and insert the card or chip with the other; an ESD strap connected to an alligator clip that is clipped to the chassis is the next step up; these two techniques are frowned upon professionally due to the potential for a shock hazard, but for hobby work on disconnected equipment they're usually good enough.

But for those rare machines or expensive boards (Sun 501-4559 SPARCEngine AXi Panther, for instance, of which I have five), working on a tested ESD mat with proper bleeder resistor and the ESD strap buttoned to it is the next step up.

The problem with ESD is that damage accumulates; a chip might get hit by ESD ten times and seem ok, but then fail a hundred operating hours later for seemingly no reason. Vintage chips have had an unknown number of ESD events; that one that you might not even feel may be its last one.
 
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To answer the OP's question, yes. Back in the 70s, I worked in an office with some sort of synthetic carpeting such that, on dry days, one had to exercise caution when approaching any large metal objects.

I managed to kill the EIA-transceivers in a micro by not being careful. On our prototypes which used a metal mask over the keyboard, one could bring the thing to its knees by simply touching the keyboard surround. We eventually fixed the problem by bonding copper braid to the mask and the grounded metal chassis. I still have one of those systems.
 
I had quite a large spark jump from my finger to a DEC RL02 disk drive 'load' button once. It didn't do any damage to the drive though. Who, in their right mind would put a carpet in a computer room!

Even if no 'damage' is done, an electrostatic discharge will reduce the life of a component.

At the end of the day, you are stressing a piece of silicon and dopants.

There are plenty of photomicrographs on the internet showing semiconductor damage due to ESD.

 Dave
 
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Killed a piece of gear intentionally? Sure, any engineer who has discovered the wonderful possibilities of a hipot tester has probably done that.
Same category as "Let's put this thing on a 3-axis shake table and see what we can destroy".
 
How would you even know?
Exactly. One common misunderstanding is that ESD kills something directly. But that is not the case. An ESD may shorten the lifetime of an IC from possibly decades to a few weeks or even hours due to internal damage. If it then fails, how would you know it was because of a discharge weeks earlier? That is the very reason why ESD protection is a must.
 
A CIA chip in my C128 by touching one of the joystick ports. I must have zapped the ports on my c64 a dozen times since the 80's but that c64 hasn't had any issues. But about a year ago I zapped one of the CIA chips in my 128. I was able to replace it but as a precaution I've 3d printed some joystick port covers.

Oh also zapped a VFD screen of an MP3 player but years later was able to get it to work again by adjusting a voltage pot.

So I am a lot more careful about ESD now, I always try to touch something metal every time I take off a flannel jacket.
 
Early '80s, I walked across a room and touched an 8085 I was working on. It was under power at the time.
It blew up the power-on reset function. Otherwise *appeared* to still work but I threw it out anyways.
 
Actually, I blew up my first C64 because I had one hand on the keyboard while touching the TV tube I used for a monitor with the other hand and zap (blew up some RAM chips).
 
Yes, stupidly many things over the years.

68040 card in an Amiga 3000. Grabbed the side of the machine with the cover off while working in the wintertime and touched the edge of the CPU, ZAP!

Probably a couple of hard drives, and other controller ports.

Also learned to never to start putting screws back into a running machine. They drop down onto the board, then ZAP!

All these things you learn over time. 99% it's fine, but that ONE time, you will regret not paying attention.

I still don't strap, but I do touch ground before doing anything now, by habit.
 
I was a road warrior when I was a lot younger and we were at Comdex setting up. I asked one of my co-techies to hand me a video card and when I reached for it the spark got there before my fingers.

But the card still worked!!

On the other hand I had a PEV (Personal electric vehicle) that was moving along a paved bike path and it was early prototype so the electronics were out in the air. somewhere along the line it got zapped and stopped responding to any commands. Just kept going until I pointed it at the bushes.

so no, and yes.

Here at my house I don't worry about it. floors are hardwood, the soldering station is a big metal box with an anti-static mat on top.
 
Also learned to never to start putting screws back into a running machine. They drop down onto the board, then ZAP!

I blew out two fuses in my ad-hoc bench power supply yesterday because I accidentally plugged the ground for one of two oscilloscope probes into the +5v supply, which evidentially provided a short to ground via the other scope probe. That, well, explains the initial one fuse, where I really feel dumb is I resolved the problem (pulled out the jumper which was clamped in the probe's ground clip and set it aside), put in a new fuse... and blew that one too because by some miracle/curse the loose end of the wire settled against the tiny bare patch of *another* wire leading to +5v.
 
An unrelated question is "have you ever killed a piece of equipment by plugging in the wrong wall-wart?" I confess to clobbering a couple of Orange Pis by mistaking a 9VDC wall wart used on an RPi for a 5VDC one required by an OPi. Damned barrel connectors!
 
An unrelated question is "have you ever killed a piece of equipment by plugging in the wrong wall-wart?" I confess to clobbering a couple of Orange Pis by mistaking a 9VDC wall wart used on an RPi for a 5VDC one required by an OPi. Damned barrel connectors!

Barrel plugs were invented by Old Scratch himself. In the mid-90’s I killed a portable Canon Bubblejet printer by plugging the wrong PSU into it. It’s not that usual for a thing to have neither the voltage or polarity marked on the case *and* be matched to a PSU that doesn’t even have the same company name on it, so… good luck if you ever get the two pieces separated!
 
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