[vcf-midatlantic] A little electronics hack
mloewen at cpumagic.scol.pa.us
Sun Sep 29 23:41:06 EDT 2019
I'm no expert on those circuits. Dave McGuire could probably offers
suggestions. Here's some further reading:
On Sun, 29 Sep 2019, Evan Koblentz wrote:
>>> It's called a 'crowbar' circuit. Prevents things from burning up.
> Thanks. I've heard that term (and seen it used on this list) but never knew
> what it meant.
> What are common reasons why those stop working? Neville and I didn't see
> any obvious signs of damage to it.
> On Sun, Sep 29, 2019, 1:56 PM Mike Loewen <mloewen at cpumagic.scol.pa.us>
>> On Sun, 29 Sep 2019, Evan Koblentz via vcf-midatlantic wrote:
>>> Neville noticed something that I wouldn't have. The circuitry contains a
>>> safety mechanism to shut off all power if the current jumps too high,
>>> as a kid inserting a paper clip. There's probably a technical name for
>>> but I do not know it. Anyway, for unknown reasons this circuit was
>>> in! He jumped it with an equal-length wire. :)
>> It's called a 'crowbar' circuit. Prevents things from burning up.
>> Mike Loewen mloewen at cpumagic.scol.pa.us
>> Old Technology http://q7.neurotica.com/Oldtech/
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
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