[RndTbl] transistor wall-clock

Tim Lavoie tim at fractaldragon.net
Sat Oct 17 18:09:21 CDT 2015

The AC frequency as a clock source will also be a problem of the utility happens to mess with that timing. Forget why the do, but it happens.

> On Oct 17, 2015, at 14:36, Trevor Cordes <trevor at tecnopolis.ca> wrote:
> Off-topic, but cool:
> http://www.transistorclock.com/?imm_mid=0da80b&cmp=em-prog-na-na-newsltr_20151017
> 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 put 
> one together.
> ICYW, I dug around the FAQ and he is cheating a bit: he's using the 60Hz 
> 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?
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