>-----Original Message-----
>From: Spehro Pefhany [mailto:speff@INTERLOG.COM]
>
>Some designs just cheat and find a way to let the user up/down
>each digit individually. I'm not sure I'd like that with a PSU
>though, as the user might change from 3.9V to 4.0 by changing
>the MSD first and blow a chip up..

We use a lot of the HP662x PSU's here, they have direct keypad entry of the
voltage and current limits.  I hate them with a vengance.  Setting 3.3
volts, you have to be ultra-carefull that the decimal point was accepted, or
things with tantalum caps tend to explode quite violently.  So I heard
anyway... :o)

I definitely think PSU's are one application where a rotary control and an
analog meter (especialy for current) are hard to beat.

Regards

Mike





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