The Yamaha AN1x Synthesizer mailing list

At 12:30 AM 10/1/01 -0400, Ed Edwards wrote:
>
>Generally, all of the curcuitry in a wall wart is usually this: a
>transformer, some diodes and maybe some capacitors.  These components can be
>easily built into the unit.  Tawdry and cheap design is why we suffer with
>these stupid warty chunks of plastic and metal that take up so much space.
>In the back of my 12 space rack I have to stuff 5 ugly wall warts which
>hardly fit.
>

I heard the real reason that companies use wall-warts for their products is 
because for any product with a power transformer, it requires UL (or 
equivalent) approval. But if the transformer is in the form of an external 
AC unit (wall wart), and the particular wall wart already had its UL 
approval years ago, manufacturers can release any number of products 
without having to get individual UL approval for them.



- 30 -
: . elson trinidad, los angeles, california, usa
: . elson@...  :  www.westworld.com/~elson
: . groove to the futurethnic beats of e:trinity at www.e-trinity.org and 
www.mp3.com/etrinity


[Non-text portions of this message have been removed]