Okay...here's a strange one. I constructed a three way switch using: a 12v, 100ma PS, two SPDT switches, two NTE R72 relays and two LEDs. Both switches control another connection simply open/closed, but the key is that when either switch is thrown the LEDs go on (or off as the case may have it). The relays have NO/NC cross connected to enable the three way. The switches are separated by 220' and it is really helpful to have the indicator LEDs and the three-way feature--but a serious bit of walking to test them.
Currently the LED merely goes from on to on and bright, not on and off as previously. I have swapped out a relay (as I do not believe one of them is working, the other I have confirmed is working). I have checked every connection and even re-soldered all of the connections on the side which got the new relay.
Lastly, this on and then on and bright when either switch is thrown is the behavior I had before the new relay and all of the soldering.
I have even tried a benchtop PS and different voltages and current--nothing but an even brighter version of the same problem. All that being said, on two occassions today I did, for five minutes each time, have it working properly.
Any wisdom, insight, suggestions would be appreciated.
Currently the LED merely goes from on to on and bright, not on and off as previously. I have swapped out a relay (as I do not believe one of them is working, the other I have confirmed is working). I have checked every connection and even re-soldered all of the connections on the side which got the new relay.
Lastly, this on and then on and bright when either switch is thrown is the behavior I had before the new relay and all of the soldering.
I have even tried a benchtop PS and different voltages and current--nothing but an even brighter version of the same problem. All that being said, on two occassions today I did, for five minutes each time, have it working properly.
Any wisdom, insight, suggestions would be appreciated.