What devices should i look for to get a -30V power supply. (lemmy.ml)

submitted 1 week ago by montar@lemmy.ml to c/askelectronics@discuss.tchncs.de

4 comments fedilink hide all child comments

I've got a VFD display on board along with UPD16311 driver is made for negative voltage around -30V and i think so is display (i couldn't find any info on display) and I'm doing it mostly from junk parts. I want to know what devices could/should contain power supply for such voltage. I've tried -12V from psu i've got lying around but it didn't work. There's also a chance that display itself is damaged but there's no visual sign of it.

you are viewing a single comment's thread
view the rest of the comments

[-] isolatedscotch@discuss.tchncs.de 7 points 1 week 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 12 points 1 week 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.

this post was submitted on 03 Jul 2024

9 points (84.6% liked)

Ask Electronics

3156 readers

2 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.

founded 1 year ago

MODERATORS

DavideAndrea@discuss.tchncs.de

linker3000@discuss.tchncs.de