There is a Gotha in that there maybe a diode in the relay. Regards Art ----- Original Message ----- From: "Dwayne Reid" To: Sent: Friday, September 01, 2000 2:05 AM Subject: Re: [EE], Relay pins identify problem ? > At 06:01 PM 8/31/00 -0700, AmR A. wrote: > >Hi, > > > >I have a 12VDC relay but i can't identify its pins > >the relay in a blue square shape > > > >pins from top-view > >------------- > >| o o | > >| | > >| o | > >| | > >| o o | > >------------- > >there is a writing in top " SONGLE" > >and small circle at the top-right side . > > > >What are the input and output pins ? > > > >Thanks > > Looks like a standard footprint. But instead of telling you what I think > the pins are, how about I tell you how YOU can find out what the pins are? > > You will need an ohmmeter of some sort. Measure the resistance of 1 pin > (any pin) to all the others. You will see one of three results: > > 1) no conduction to any other pin > 2) a very low resistance to one pin > 3) a resistance reading of several tens or hundreds of ohms. > > Case 1) the pin is either not used (unlikely but possible) or is the > Normally Open contact of the relay. > > Case 2) You have found both the Armature and Normally Closed pins on the relay. > > Case 3) You have found the coil. > > Do this until you have identified both the coil and contacts on the > relay. Then apply power to the relay coil and look for a low resistance > reading between the pin identified in Case 1 and one of the pins identified > in Case 2. The pin that showed low resistance both times (steps 1 & 2) is > the armature. Done! > > dwayne > > > > Dwayne Reid > Trinity Electronics Systems Ltd Edmonton, AB, CANADA > (780) 489-3199 voice (780) 487-6397 fax > > Celebrating 16 years of Engineering Innovation (1984 - 2000) > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * > Do NOT send unsolicited commercial email to this email address. > This message neither grants consent to receive unsolicited > commercial email nor is intended to solicit commercial email. > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.