Newsgroups: sci.electronics
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!zaphod.mps.ohio-state.edu!wuarchive!uunet!lanai!bcc
From: bcc@Eyring.COM (Brian Cooper)
Subject: Re: NEEDED: POWER SUPPLY FOR M68HC11EVB
Message-ID: <1991May27.170425.744@Eyring.COM>
Keywords: power supply
Organization: Eyring, Inc.
References: <823@mixcom.COM>
Distribution: usa
Date: Mon, 27 May 91 17:04:25 GMT

In article <823@mixcom.COM> jjwwjj@mixcom.COM (Robotic Systems) writes:
>
>After much praise in several newsgroups, I purchased a M68HC11EVB. Now
>I need a power supply! Any suggestions?
>
>Anyway, I need a power supply: INPUT 115VAC, OUTPUT +5VDC @ 0.5A,
>+12VDC @ 0.1A, and -12VDC @ 0.1A. A PC power supply should work fine.
>
I found myself in the same fix when I got my EVB.  Radio Shack doesn't have
anything like what I needed, so I went to the local Deseret Industries 
(translate to Salvation Army/Thrift Shop/Harry's Pawn Shop/Bob's Army-Navy)
where I bought a TI 99/4A for $6.  The internal power supply (make sure you
get the transformer that goes with it) supplies +5/+12/-5.  I worried about
the -5 not being -12 but it is only used for the RS 232 and just looks to
the other system like a long cable has attenuated the signal.  Works fine!