I have a bipolar psu circuit delivering +/-28vdc using standard LM317/LM337 regulators. This powers the circuit of a compressor, but I also need to (separately) send +24vdc to a couple of relays used for bypass. The relays do not necessarily need to be on the power rails of the audio circuit.
I tried sending the full +28 to the relays but they didn't seem to like that (although supposedly they are rated to handle it) and weren't switching when supplied with this voltage. So now I want to find a good way to get the appropriate +24v. I can only think of two options, and I want some input on if there are pros/cons to these or if perhaps there are better solutions that I'm not thinking of.
1. Just stick a decently rated resistor between the +28 from the psu and the relay. This seems like a coarse solution, but maybe it's all that needed...?
2. Add an additional, separate rectifier and LM317 circuit to the psu outputting +24 and send that to the relays instead. This seems like maybe it's overkill, but it strikes me as a surefire way of achieving the goal.
Thanks for any thoughts and input you have!
I tried sending the full +28 to the relays but they didn't seem to like that (although supposedly they are rated to handle it) and weren't switching when supplied with this voltage. So now I want to find a good way to get the appropriate +24v. I can only think of two options, and I want some input on if there are pros/cons to these or if perhaps there are better solutions that I'm not thinking of.
1. Just stick a decently rated resistor between the +28 from the psu and the relay. This seems like a coarse solution, but maybe it's all that needed...?
2. Add an additional, separate rectifier and LM317 circuit to the psu outputting +24 and send that to the relays instead. This seems like maybe it's overkill, but it strikes me as a surefire way of achieving the goal.
Thanks for any thoughts and input you have!