Electronics > Repair

Linear PSU question

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Hrvoje_CRO:
Hi!

I have purchased for a cheap (20euros) a power supply made by unknown brand. The unit has a 1 analog instrument which shows voltage/current.
So the main question is why does my psu behave like shown in a video? I mean, why voltage jumps to the max. value during the powering the unit off?

https://easyupload.io/g4favk

Thank you and sorry for shaky video.

Hrvoje

IanJ:
No video, just a bunch of Ads and a link to some dodgy software.
Try YouTube or Odysee.

Ian.

Hrvoje_CRO:
Hi Ian!

Try it download from https://files.fm/u/f2x6wgwzbg here.

Thank you!

Kind Regards,
Hrvoje

tunk:
There may be stored some energy in a capacitor.
Try to put a load on it, e.g. an 1k resistor.
Photos of the inside may help understanding how it works.

Hrvoje_CRO:

--- Quote from: tunk on November 09, 2024, 04:31:40 pm ---There may be stored some energy in a capacitor.
Try to put a load on it, e.g. an 1k resistor.
Photos of the inside may help understanding how it works.

--- End quote ---

I agree! Tomorrow i will post some pics ;)

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