EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: oz2cpu on May 23, 2024, 12:52:34 pm

Title: DIY powersupply really old with push-buttons special idea
Post by: oz2cpu on May 23, 2024, 12:52:34 pm
here is a new teardown video from me,
this design idea is so special and rare it is worth to mention here:
https://youtu.be/nZnH6WrpSAU

i think it is from 1975-1985, name of designer unknown
the push-buttons for all voltages is a really special idea, I have not seen anything like this before,
it dont really work in real life if you ask me :-)
this one is full of loose connections and unstable behaviours, i did not repair it for now, since its low useability for my lab / collection.
Title: Re: DIY powersupply really old with push-buttons special idea
Post by: coromonadalix on May 23, 2024, 03:26:07 pm
yeah tons of possible failures     thks for the video
Title: Re: DIY powersupply really old with push-buttons special idea
Post by: oz2cpu on May 23, 2024, 08:51:48 pm
exactly.. I think we figured out what this idea is not seen anywhere else..
or please prove me wrong :-)
Title: Re: DIY powersupply really old with push-buttons special idea
Post by: nctnico on May 23, 2024, 11:17:47 pm
here is a new teardown video from me,
this design idea is so special and rare it is worth to mention here:
https://youtu.be/nZnH6WrpSAU

i think it is from 1975-1985, name of designer unknown
the push-buttons for all voltages is a really special idea, I have not seen anything like this before,
Some PSUs have a slide switch for a semi-fixed output channel. Like this one from Siglent:
(https://static.eleshop.nl/mage/media/catalog/product/cache/9/thumbnail/1920x/040ec09b1e35df139433887a97daa66f/s/p/spd3303c-1000.jpg)

So the idea is not that weird.