Comment by a1o | Hacker News Reader

Comment by a1o | Hacker News Reader

> A DC power supply capable of providing 12V

Hey, I just remembered my school used to have ages ago some cool power supplies (I think from Agilent?) that were very idiot proof, they had current limit with a dial that I think didn’t went over 1A or perhaps even less, and they would instantly disarm on short circuit (and indicate it with a led), and also the voltage dial I think wouldn’t go over 25V. I remember it was very big and heavy, but it survived countless students that used the lab daily.

Nowadays, is there any power supply available that is that resistant or is the recommended approach to get an used old one? Does anyone have a power supply at home that is also used by kids with a brand/model they would recommend? Thanks!

What you're describing is a lab power supply. (The "instantly disarm on short circuit" is overcurrent protection, which is a standard feature.) The name brands like Keysight or Rigol are kind of expensive, but there are a lot of no-name models on Amazon which will do the job well enough.

Keysight == Hewlett-Packard Old School.

Or Agilent, at some point in between

{Keysight, Agilent, Avago, HP, HPE} are/were all HP

Thanks! I had a BK Vision or something similar at some point and it just blew up. I will give it a search for these brands, sometimes I find a well-cared used one from the more expensive brands at good prices so that’s what I will look for first. :)

Those were called something like desktop power supplies.

https://www.mouser.com/c/power/power-supplies/power-supplies...

AT $5k it better make me breakfast, too.

Got this for ~50$ a while ago. It works perfectly for this exact setup (Tesla MCU on a bench), tested it, and used it for a lot of other projects.

https://a.aliexpress.com/_EvT5Kog

They have variable dc power supplies on amazon on the cheap.

If you want that sort of reliability it will probably go towards 100$.

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