Re: Power supplies

["Dave McLaughlin" <dave@xxxxxxx>]

HI Paul,

Easy..

Connect 2 PSU's as follows.

+12V on second supply to GND on first. Your +12V is now the +Ve output on
the first supply and your -12V is the GND on the second supply. GND will be
the +Ve and -Ve (GND) on the joined connection. I'll try to do a diagram
below... I'll use a variable spaced font so make sure you use that yourself
or it will look strange.

PSU1              PSU2
+               -      +               -
!               !       !               !
!               !-----!               !
!                    !                   !
!                    !                   !

+12V           GND           -12V



Hope this makes sense


Dave...


----- Original Message -----
From: "Paul" <groups@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, May 22, 2003 2:48 PM
Subject: [ukha_d] Power supplies


I’ve got a load of PSU’s from a previous employer about 15
years ago! I need
a +12V and -12V supply for the circuit I’m building but I only have
+12V
(but lots of independent +12V supplies) – Can I connect multiple
+12V
outputs together some how to get -12V ?

Paul.