Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!cs.utexas.edu!oakhill!seningen
From: seningen@oakhill.UUCP (Michael Seningen)
Newsgroups: sci.electronics
Subject: Re: Need help to finalize my circuit
Message-ID: <2565@serval.oakhill.UUCP>
Date: 2 Nov 89 21:42:27 GMT
References: <1508@clyde.Concordia.CA>
Reply-To: seningen@serval.UUCP (Michael Seningen)
Organization: Motorola Inc., Austin, Texas
Lines: 12


just guessing but how clean is your output from your ac adapter.  I bet that it may not be pure DC.  Try putting filter caps on thje outputs.    

----13 VDC? ---|cap|--7805--relay
               |   |
                ---
                gnd

cap should be tied between ac adapter output and ground.

mike seningen
oakhill\!serval\!seningen