> Of Bill & Pookie > Sent: Wednesday, February 22, 2006 10:41 PM > > Combining the micro switch and the relay, have the "protruding pin" push > down the movable contact on the relay instead of the coil pulling it down. > > Pookie There are relays made with "push-to-test" buttons built-in that mechanicaly move the relay "wiper" contacts. We use them here. An example is a SongChuan 703XBM - DPDT unit rated for 10A @ 120Vac. I can't seem to locate a good picture. The relay is about 1" x 1" X 2" (We call them ice cube relays since they are in clear plastic cases and look a little like ice-cubes). The test button is about 1/8" dia and sticks out from the case about 1/8". I don't know the actuation force needed on the test button though. I suppose I could measure it if you're interested. I'm sure other relay people make similar units. Maybe as Pookie suggest, you could have the pin on your tester simply push the test button on the relay - simple solution. -- Mark P.S. Hey peisermann - I see you are in the 440 area code - you must be nearby. I work in Parma, OH. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist