[sdiy] power supply

[Tim Parkhurst]

Hi Caleb,

Well, you're definitely going to need a regulator of some sort to take the
+18V down to +9V (and to clean it up and regulate it, of course). Maybe
there's some trick where you could split the +18V and use a "floating"
ground, but I think this would be more trouble (and more expensive) than
just adding a +9V regulator. You'll end up hooking the 9V regulator to the
+V and G terminals of the PAIA supply. Note that the "-" terminal on the
battery is really used as a ground. You'll also need to make sure you don't
exceed the current limit of the regulator or the PAIA supply (although if
you're replacing a 9V cell, you're probably not using a whole lot of
current). Also make sure the +9V regulator can handle +18V at it's input. 

Any sites out there with relevant schematics, guys and gals?

Tim Parkhurst (Tim Servo)
Design Engineer (who sent this message while on a break and doesn't want
people to pay attention to the confidentiality notice that gets tacked onto
the end of this by our server)

Silicon Bandwidth
*****************************

-----Original Message-----
From: Caleb Johnston [mailto:caleb_1 at msn.com] 
Sent: Tuesday, July 30, 2002 1:04 PM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] power supply


This should be an easy question to answer for the experts.  I want to do 
this correctly so I dont fry anything.

I have a module that runs on 1 9V battery.  I want to run this module from a

power supply.  The power supply is Paia's 9770u which is the 'unregulated 
+/- 18 V DC @ 350 mA.  The connections on this power supply are +V,G,SG,-V.

The module only has + and - for the battery.

What would be the best way to do this?  Do I need to then regulate the 
power?

thanks in advance for the help,
Caleb


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