I just bought this power supply for a project:
It is supposed to power two somewhat larger stepper motors (and an Arduino), so I needed something with a beefier amp rating.
After attaching it to a panel mount DC connector, I just went in with a multimeter to test the voltage and PINs, which gives me a 20V reading as expected.
However, after I remove the power supply from the wall, I still see 20V initially, and then I see the voltage dropping quite slowly, over a fairly long period; I'd say around half a volt per second, or even slower.
- I'm a beginner, and don't know what to make of this? Is this a normal phenomenon and does it have a name?
- Is my power supply broken or low-quality (it didn't come cheap!) Did I measure it wrong?
- Might this not be an issue with devices that expect a certain minimum voltage?