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Date: 01/27/00 at 1:54 PM
Posted by: Brian Snell
E-mail: bsnell@lara.on.ca

In Reply to: power supply for image scanner posted by Jeff Bates on 01/26/00 at 10:57 PM:

: I have an INFO computer image scanner and I have no power cord for it. It's rated at 12 volts, 1 A. I have 12 volt AC power adapters but they are all rated at 300mA. What's the difference between mA and A? And will a 12 volt AC power supply at 300mA burn my scanner? I'd really appreciate your help. Jeff

Most of the scanner power supplies I have seen are a switched mode type. These are very efficient and pack a lot of capacity into a small package. You may be able to order one from a scanner manufacturer, such as Visioneer. Alternatively, contact Herbach & Rademan (they are on the Web and have an on-line catalogue.) They stock a large variety of the bigger plug-in supplies. Not all plug-in supplies are well regulated nor smooth as far as DC out is concerned. I believe your best bet would be Visioneer. Radio Shack also had a Universal plug-in a while ago. It was switched mode and also should work O.K. for your application.
If you want to construct a well-regulated one your self, drop me a note and I will forward you a schematic.

bsnell@lara.on.ca

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