[time-nuts] UPS for my time rack

Hal Murray hmurray at megapathdsl.net
Thu Oct 15 02:22:05 EDT 2015

gigneil at gmail.com said:
> Those traco power units are fantastic. Absolutely great. 

I first encountered power "bricks" 10 or 15 years ago.  They come in various 
sizes.  Full brick, half-brick, and quarter-brick were common when I was 
watching, with the usual blizzard of output voltages.  They are made by many 
vendors.  There is lots of competition on two fronts: efficiency and 

I think the original ones were targeted at phone company applications since 
they ran off 48 V.  (That may have just been the ones I was paying attention 
to.)  Other input voltages are also common.  The input voltage typically has 
a 2:1 range.

The pinouts are reasonably standard.  I don't know if there is an official 
spec or everybody else copies the first company to get something good on the 

These are my opinions.  I hate spam.

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