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EEVblog #1030 - $20 DIY Bench Power Supply!

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EEVblog:
Dave looks at the spectacularly cheap $20 DPS series CC/CV modules from RD Tech.
How to make a 30V 3A bench power supply with 1mA resolution constant current limiting and multi function display using junk bin parts.
The DPS3003 30V 3A module in particular.

RDtech Youtube channel: https://www.youtube.com/channel/UCy73jJ5-ZqhPzT7wJ6KTIaw

Aliexpress Store: https://rdtech.aliexpress.com/store/923042

cdev:
In one of the threads on these modules (here) around nine months to a year ago, I think the OP had figured out how to make the modules externally programmable.

Anyway, at some point the OP of that thread discoverd some glitch in the device which suddenly caused the voltage to become uncontrolled, and I think caused some kind of problem. I don't think this was in the standard use case, so it likely does not matter to viewers just looking for a power supply.

Also, this was a while ago so its entirely likely that whatever the glitch was the manufacturer may have fixed it.

I will try to find the exact link. This was when I was looking for a good power supply so I may have even bookmarked it.

So, if this glitch was fixed, these supplies may also be a good base for a project to build a programmable CV/CC supply.

cezar:
Those are being made by RD TECH. They also have their own YT channel

https://www.youtube.com/channel/UCy73jJ5-ZqhPzT7wJ6KTIaw/videos

ManuelMcLure:
I already have a bench top supply based on their DPH3205 buck-boost module. The power source is a Cosel 12V/13A switcher.

jamiec:
I made one of these myself a couple of weeks ago and absolutely love it.
Would recommend to anyone, wanting a small PSU.

Here is a photo of my build:

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