Budget friendly adjustable bench Power supplies perfect for testing LED's and other uses!

The Dell EPS-470 power supply previously mentioned in this thread is the same price, more powerful, and much better quality. I got mine on eBay for $24 shipped.

Sadly I couldn’t find any this side of the pond. I did manage to find the Banggood supply much cheaper on eBay so that’s something.

I ordered a DPS3012 from RD Tech last week. The discount is still available for the forum so get your orders in. You need to ask before you order. They have been very nice to deal with. Looking forward to putting it all together.

Some additional information about the buck/boost module I previously linked (#69):

Marty's Techno Blog Software Engineer - MingHe buck/boost converters – handy, if you’re careful!

Also called D3806/B3806/DPS3806. Advisable to disconnect the load on power down first to avoid voltage overshoots.

Inexpensive: https://www.aliexpress.com/item/DC-DC-Adjustable-10-40V-To-0-38V-Digital-Step-up-Step-down-Power-Supply-Boost/32789812405.html

May also be found a tad cheaper if you look for “app only” deals.

Cheers ^:)

The DP shop now offers pre-made cases to fit, including a fan, rear switch, and banana connectors for input and output. No room to squeeze in an extra xt60 connector on the front though.

Flintrock, I’m having problems finding it, do you mind linking me?

Edit: is it this one?

this

Yes, that is it, they have 2 versions, 1 for the small 5A and below power supplies and another for the larger 10A+ power supplies.

Meh, I spent $35 on the power supply, I’m going to have a hard time justifying $22 for the enclosure…

Well if you scavenge everything of course you can save $22. But most enclosures cost 9 or 10 plus shipping, and add a couple of bucks for the connections and switch, the couple of bucks left over then is getting you convenience (it all already fits, no cutting) and an enclosure of just the right size, if it's got everything you want. Also I think there's a discount available, just mention BLF as always. It won't be for everyone, but it's a pretty nice option. It's nice that they went with the full binding posts for connections.

Yeah, it’s a fair price probably. I’m just weird and like to splurge on some things and cheap out on others.

I agree, I would most likely have still built mine DIY even if this was out at the time. Things that don’t give me a tangible benefit are very hard for me to justify with my current balance of time vs money.

Now down the road things will most likely change some.

Is that case aluminium?

Anyone knows?

It appears to be aluminum.

Open source aftermarket firmware available.

https://johan.kanflo.com/opendps-design/

It removes cc from the firmware.

Interesting, although I have to say I actually prefer the screen of the stock firmware better. The colors are nice and I like having the wattage.

If it removed CC then it is really almost pointless it would seem but still a good start for modding.

I would love to see the ability to have an “external voltage reference” added. Basically so you could connect another set of wires that would run to the end of the leads and be used strictly for voltage readings. Thus eliminating the voltage sag in the leads themselves at higher currents.

This is a rather large issue when dealing with 10A+ currents, even with 12AWG wires.

I just spotted this thread and read a few comments. I wanted to share what we all know but maybe forget - you can chain power supplies just like batteries. You can double your volts or double your amps with two small ones.

How would that work with these since the input is limited to 60v input due to the input caps?

Now you could run them in parallel current mode easy enough I suppose, at least the DPS series that doesn’t need a diode. The ones that need a diode would fry I imagine.

Whoa, be very careful doing that. Chaining batteries doesn't take Negative of each battery to ground. Thus, shorting the positive of the previous battery to ground. If you chain power supplies, you need to somehow float the ground of the succeeding power supplies' outputs to prevent shorts.

I generate 0-60v from two 30v power supplies all the time like this. You connect a POS and NEG to each other, and set them aside. (aka wired in series) Then you use the remaining two wires for your 60v