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Discussion Groups | Piclist | Wisp628 and 3V

A discussion group for the PICMicro microcontroller. Also called the Microchip PIC, this list is dedicated to the use and abuse of this fine, simple, microcontroller. Close to topic posts are welcome, ie. general electronics.

Wisp628 and 3V - upand_at_them - Mar 1 22:30:00 2005



I assume that if I power the Wisp628 with 5V via the 3-pin header I
should be able to program a PIC in a circuit running on 3V. Correct?

Is there a way I can isolate a 3V-only device (it won't tolerate 5V)
from the 5V signals coming from the Wisp?

Mike




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RE: Wisp628 and 3V - Wouter van Ooijen - Mar 2 2:49:00 2005

> I assume that if I power the Wisp628 with 5V via the 3-pin header I
> should be able to program a PIC in a circuit running on 3V. Correct?

maybe, but the 5V signals (PGM, PGD) might 'leak' into your 3V supply.

> Is there a way I can isolate a 3V-only device (it won't tolerate 5V)
> from the 5V signals coming from the Wisp?

one or more relais?

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu





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