How about something like this buck/boost module? Supply DC power at a fixed voltageo and you get adjustable voltage output over a wide range, adjustable constant current output, digital display of voltage, current, power and other parameters, a graphic display of voltage and current over time and more.

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I don't know if I want to spend a hundred buck on a dozen of them. (Bit of an overkill for this particular project because I really don't need the display either.) But it might be nice to have a couple of those on hand for cases where using the bench supply is already in use. Thanks for the suggestion!

 

Check out how I use these supplies as a handy bench supply. Using an Xbox power supply, I have 5v@1a, 12v@10+a and an adjustable output at 4 amps.

I screwed it to the shelf over my bench – handy to see and use, but out of the way.

 

I don't know if I want to spend a hundred buck on a dozen of them. (Bit of an overkill for this particular project because I really don't need the display either.) But it might be nice to have a couple of those on hand for cases where using the bench supply is already in use. Thanks for the suggestion!

On Amazon you can often find multiply buck circuit boards ready to go for maybe 5 for $10 USD or something like that. I'll check now.

This had shown up:

5V Buck Converter Module 5 Packs DC 5-30V to 5V Step-Down Regulator Board 1.8A Output for Arduino, ESP32, 12V/24V Systems, DIY Electronics
Brand: Euogeudel

$8.69

Check that out if you think it might help. You get 5 of them for less than $9 USD.
Oh maybe they only put out 5v. Let me check again...



LM2596S Buck Converter Buck Module DC-DC 3.2-35V to 1.25-30V 3A Voltage Adjustable Buck Converter Module(Pack of 6 Pcs)
Brand: EPLZON

$9,99 USD for 6 boards.

Amazon's Choice