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Help with Relay Switching ala the Jim Kelly Project SOLVED
#1
Hey guys I started a build that uses the simple relay circuit from the Jim Kelly project in TUT 5 and need some help. I haven't done any relay switching before so my problem is not leaping out at me.  

The pre-amp I'm using different than the Jim Kelly but the concept of how I wanted to switch the channels is the same.  My problem is the when I switch channels the relays I'm using are make no connection at all when the panel channel switch is in the open position.  When it is closed and grounding the relays go the Normally Closed position. 

I'm using the Hammond 272JX and using the 5V taps with the same power supply circuit as the Kelly project.  I'm using this 12V relay: http://www.futurlec.com/Relays/DS2Y-S-DC12V.shtml

With the panel switch closed I'm getting ~12 VDC on the positive terminal on the coil and 0 VDC on the negative terminal.  With the panel switch open I'm getting ~13.5 VDC on both the terminals. 

Any ideas?  Thanks!
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#2
Hi Makinrose

Did you check that the relay contacts are wired right? I had one where the wiper was in the middle and another where the wiper was at the end of the pins. Guess they can be different?
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#3
(02-09-2019, 04:21 PM)nauta Wrote: Hi Makinrose

Did you check that the relay contacts are wired right? I had one where the wiper was in the middle and another where the wiper was at the end of the pins. Guess they can be different?

Thanks for reply. I've looked it over a number of time and it appears right. Granted after you look at something it enough times it get harder to see things clearly.  It really seems like the relays are not activating properly and with panel switch in one of the positions they don't connect to anything with my meter.  They only click when the panel switch is grounding.
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#4
Well...I knew this had to be some dumb error....it turns out the relays I was using have different pin out. Now that I fixed that it's working perfectly!!
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