[RndTbl] transistor wall-clock

Adam Thompson athompso at athompso.net
Sat Oct 17 16:54:39 CDT 2015

Neat... And no @#$%! way am I going to spend that much time soldering together a clock, even if it was only $5.  A not-overly-accurate-clock, at that!

However, as noted in the details, there's a 120VAC-to-9VAC wall transformer involved, so even if you hung on to the bare leads with your hands, you wouldn't likely be getting anything more than an unpleasant tingle/buzz.
Of course, I don't have all the details, and that looks (just eyeballing it) like a fairly hefty capacitor - the  *possible* discharge current involved *could* be enough to be severely unpleasant.  But not _likely_ to be harmful.  Don't take this as any sort of guarantee, however.

On the other hand, you could easily cover the bottom-left corner with a clear plastic shroud of some sort, and touching the rest of the board would likely (again...) be a non-event.


On October 17, 2015 4:36:04 PM CDT, Trevor Cordes <trevor at tecnopolis.ca> wrote:
>Off-topic, but cool:
>A guy selling kits to make a all-parts-exposed digital wall clock that 
>uses *no ICs* and *no crystals*.  You build it yourself, 1250 parts to 
>solder onto a custom board.  Too pricey for me, otherwise I'd love to
>one together.
>ICYW, I dug around the FAQ and he is cheating a bit: he's using the
>of the AC as a timer source.
>Hmm, since it plus into AC, does that mean touching some parts of the 
>exposed circuits might give you a nice zap?
>Roundtable mailing list
>Roundtable at muug.mb.ca

Sent from my Android device with K-9 Mail. Please excuse my brevity.
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