Comment on What devices should i look for to get a -30V power supply.
isolatedscotch@discuss.tchncs.de 4 months ago
i didnt quite understand the issue, but if you just need -30V you can get another 30V power supply and join them in series (the ground wire from the old and the positive wire from the new supply), then you can use the joined wire as ground, the ground side of the new supply as -30V and the positive of the old supply as +30
Nawor3565@lemmy.blahaj.zone 4 months ago
You just need to be careful that the supplies’ outputs are completely isolated from mains. Otherwise you’ll end up with a lovely spark show.