> Hi Vasile, how about a challenge, for a simple
> step-up circuit to power a 4v to 5v PIC from
> a 1.5v battery, or even a 1.2v NiCd cell.

Pity you put the PIC restriction on it. If you were using a Cypress
PSoC microcontroller the SMPS would require 1 diode, 1 capacitor
and an off the shelf inductor. 0.9V in -> 5V out.

Steve.

======================================================
Steve Baldwin                Electronic Product Design
TLA Microsystems Ltd         Microcontroller Specialists
PO Box 15-680, New Lynn      http://www.tla.co.nz
Auckland, New Zealand        ph  +64 9 820-2221
email: steveb@tla.co.nz      fax +64 9 820-1929
======================================================

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