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Power supply for beginner?

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live2fish88:
Hey guys, looking for a DC benchtop power supply. I do a lot of 5v & 12v diagnostic (vehicles) as well as battery charging, 6v, 12v. I'd like to be able to power electronic devices on the benchtop (was repairing a cheap RC car for my son the other day and had to keep plugging and unplugging the battery). On the amperage side of things, i'm not so sure what i'd need. I'd think 12-16v would be plenty. What runs at 30v? I see a lot of cheaper power supplies running at 30v. I was looking at the Siglent SPD1168X but was unsure if there was better for the money. Also unsure as to why you'd want two channel, 3 channel, 30v, less amps, etc?

ledtester:
$200 is a lot to pay for a battery charger - I would consider just getting a dedicated unit.

For your electronics power supply I would start with an old laptop power brick and a "buck converter module" like one of these:

https://www.amazon.com/TKXEC-Adjustable-Converter-Regulated-Laboratory/dp/B0D6VCJZQY/

https://www.amazon.com/Converter-Regulator-Adjustable-Regulated-Laboratory/dp/B0978T3JKH/

https://www.amazon.com/Converter-DROK-Regulated-Adjustable-Regulator/dp/B098347BD9/

https://www.amazon.com/DC-DC-Buck-Boost-Converter-Adjustable/dp/B0D5FNPTJS/

If you find that you need higher than 16V or power with less noise then you can spend more money.


KungFuJosh:
~30V is pretty standard for a bench power supply. Sometimes you'll see lower voltage with higher amperage, but that's typically how it works. Choose what you need: higher A, or higher V.

My first bench PSU was the tekpower TP3005P: https://www.amazon.com/gp/product/B06XCQN82X/

It's good for what it is, and 30V with 5A is nice. I got a good deal on and SPD3303X, and that's the only reason I stopped using the tek.

Multi channels are nice. One thing you can do is to place them in serial or parallel to increase your output V or A. Or, you know, power multiple devices.

DavidAlfa:
There're plenty of affordable 30V 10A PSUs in Aliexpress for about $50.
Might not be the best, but unless you're running laboratory equipment, will do the job just nice.

For example, the WPS3010H:
www.aliexpress.com/item/1005003151034729.html


A pretty complete review:



BeBuLamar:
For general electronic testing 0-30VDC 5A is sufficient. If you want to work on automotive stuff I think you need to get a fixed 12V (13.6-14V) high current power supply as a lot of the automotive accessories draw a lot of current.

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