[ILUG] OT: stepping down from 12v to 9v

[Brian Foster]

  | From: "Kenn Humborg" <kenn at bluetree.ie>
  | Date: Fri, 28 Apr 2006 12:38:10 +0800
  | 
  | On 28 April 2006 08:33, Paul Jakma wrote:
  | > On Fri, 28 Apr 2006, Brendan Kehoe wrote:
  | > > Anyone know of a device already available that would take a 12V DC
  | > > signal (like comes in a car's 12V adapter) and step it easily down
  | > > to 9V DC?
  | > 
  | > A transformer?  [...]
  | 
  | Like I always say - beware of routing software developers
  | giving electronics advice :-)

 well, you _could_ use a “transformer” in several
 very indirect ways:  e.g., convert to AC, step-down,
 then convert back to DC;  or do the sort of thing
 factories do, use either an AC or DC electric motor
 to spin a DC generator producing the desired power.

 all rather silly though in this case.

 just to throw out another possibility (less silly),
 how about another AC->DC supply, but one with the
 needed 9VDC out?  e.g., use the one you have for
 the 12VDC, and the second one for the 9VDC.
 but _I_ dunno now that would compare to a DC/DC
 convertor &tc w.r.t. power, heat, size, initial
 and running costs, and reliability, however ....?
cheers!
	-blf-
-- 
Experienced (20+ yrs) kernel/software Eng: | Brian Foster   Montpellier,
 • Unix, embedded, &tc;  • Linux;  • doc;  | blf at utvinternet.ie   FRANCE
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