Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!tank!eecae!cps3xx!usenet
From: usenet@cps3xx.UUCP (Usenet file owner)
Newsgroups: sci.electronics
Subject: Re: Need help to finalize my circuit
Message-ID: <5239@cps3xx.UUCP>
Date: 3 Nov 89 18:48:57 GMT
References: <1508@clyde.Concordia.CA> <2565@serval.oakhill.UUCP>
Reply-To: beyer@frith.UUCP (Don W Beyer)
Organization: Engineering, Michigan State University, E. Lansing
Lines: 9

I agree entirely with Mike Seningen!  In fact, since your AC adapter
probably has very long leads (compared to your bench supply) you
might very well need a lot of bulk capacitance (>100uF) on the unreg.
side of your 7805.  Putting a 1 uF tant. cap in parallel with a 
0.1 uF ceramic cap on the output of the 7805 will probably also
help clean up things a lot.  The filtering inside the AC adapters
is often very poor.

Tom LeMense