I have a couple of regulated supplies that I made, one +-12VDC and one +-18VDC, for testing opamp circuits, etc... I thought I would put them in one case with a little 18-0-18 toroid and a dpdt switch. I was going to put the switch between the toroid and the two psu inputs and run both psu outputs to the output jack on the case. Question, is there a problem one psu seeing the output of the other psu if their not on at the same time? Picture enclosed.
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Kind of depends on what's in the circuits.
It might be best to switch between the PS outputs rather than the PS inputs.
The unused supply won't mind unless it's unusual and dissipates a lot of power at idle,
like a high current shunt regulator.
It might be best to switch between the PS outputs rather than the PS inputs.
The unused supply won't mind unless it's unusual and dissipates a lot of power at idle,
like a high current shunt regulator.
Thanks rayma. Wasn't sure about feeding +-12 or +-18vdc in to the output of another psu, even though it's off.