Jason White wrote:
> Warning schematic not very well drawn: shield eyes
>
> its simple: Connect wire and you get POOF !
>
>   
4.8V battery packs are not 4.8V. They *might* be 4.4V to  > 6.3V,  if  
Alkaline,  or  4V  to 5.9V if NiMH, or  4.4V to 9V for a pair  of 
Lithium based rechargeable  cells.  It's safe to connect a PIC to 3 
cells direct (Alkaline, NiMH), but maybe not to four  without a  "low 
drop out  regulator" . There are IC such as LTC1174 that with a small 
coil, two caps and a Schottky diode  can give  3.3V  or 5V  for a  4V to 
18V input.  That  would  allow operation from 4 x NiMH, a car cigar 
socket, a USB supply or even 2 x LiPoly. Though LiPoly are not for 
beginners. They need special charging and discharge limit circuits.

 
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist