(Part 2) Best power supplies for labs according to redditors
We found 86 Reddit comments discussing the best power supplies for labs. We ranked the 31 resulting products by number of redditors who mentioned them. Here are the products ranked 21-40. You can also go back to the previous section.
https://www.amazon.com/gp/product/B007BVCBOE/
https://www.amazon.com/gp/product/B01MG60ZKI/
https://www.amazon.com/gp/product/B01M4Q5ACT/
Go LED but a little bit more current.
https://www.amazon.com/Velleman-PS1503SBU-Digital-Display-Backlight/dp/B000I3X7Z4
Based on the feedback in the thread (and the fact that I've already modded an ATX power supply), I'm going to buy a bench power supply.
I'll be powering motors and microcontrollers that have different voltage requirements. So, should I get a multichannel power supply? Should I get several single-channel units? Or, should I get a single channel power supply and build my own circuits to step it down for the lower voltage circuitry?
> A cheapie will usually do
There's a significant range of prices: a single channel Rigol or Agilent costs more than a multichannel BK Precision. Likewise, a single channel BK Precision costs more than a multichannel Tekpower. If there's a significant quality difference, I'm fine with paying for it: I'd like to get something that supplies high quality power and is built well. However, I'm sure at some point I'd be paying for features and precision that I don't need.
For instance, the Tekpower TP-3005D-3 looks pretty appealing. This review shows that it's built better than the Mastech HY3005F-3 (EEVblog teardown). There are also plenty of people who seem to be happy with their Mastech and Dr. Meter power supplies. Looking at the chassis for the Tekpower, Mastech, and Dr. Meter 3 channel power supplies, they all appear to either be rebranded versions of the same unit or some of them are knock-offs.
Beep boop you want a power supply: https://www.amazon.com/Precision-0-100V-Adjustable-Digital-Regulated/dp/B01831QRFY
We have a bunch of B&K Precision PSU's like this (and other max voltage ratings). They're switching supplies and have no problem being used in parallel or series. We had a lengthy discussion with one of their engineers to about our applications and their equipment capability. Something to think about...
If you buy less than a $300 power supply and it blows up $10,000 of hardware because its output regulation is as shitty as this one's, then that's kind of false economy, isn't it? This supply's radiated EMI is also shit, like 14dBuV over the Class B limits. That is junk.
The output regulation on the one I had drifted multiple volts over six hours. Don't use this POS for work without an overvoltage zener, a fuse, an inline resistor, and a pi filter after it, or you will be risking the success of your project.
And if its shittiness costs you more than a day, that is at least $200 in just loaded wages alone for you, to say nothing of other peoples' time you're going to waste. (If something wastes a day of my time, it costs my employer or client more like $1000.)
And the DARPA grants I've worked on do pay for >$300 power supplies.
At the very very least get this one as you have at least a chance at it not being utter shit (as in, smoking itself) and it's USB programmable. EEVblog seemed to like it.
A good power supply is the bedrock that everything else rests on that you build. With a bad one like this Arksen, you're building in a swamp.
Not the cheapest, but I ended up getting one of these. Makes it simple to setup and adjust.
https://www.google.com/search?q=lab+power+supply+15V+30A&oq=lab+power+supply+15V+30A
https://www.amazon.com/TekPower-TP1830SB-Adjustable-1-5-15V-Reglator/dp/B01KPBAN6O
So it looks like the official power supply model is M5849. Looks to be straight 28v output; on the 4 pin power connector 2 pins are +28v and two are -28v.
You could use something like this to power it. Getting a hold of that weird 4 pin connector might be tricky. Being Apple I doubt it was a standard thing you could order from somewhere like digikey; if it is I honestly wouldn't know where to start there.
But for $10 more you could buy the real deal it looks like.
All of that being said the one you linked is untested and quite possibly non-functional. For $100 you can have a tested working one with a power supply. Obviously I don't know your budget or goal but the whole thing seems like a bit of a faff that I'd expect there's an easier/cheaper way to accomplish.
One final note if you do roll your own power supply check it out internally before powering it up. I have a similar 24v "industrial" adapter powering my old 30" cinema display and the build quality's about what you'd expect for $20-30; there were some things that needed tightened down that could have caused some issues if I hadn't checked it out first.
Well, you can always try the H bridge using the 6V output and see what happens. But power supplies are not very expensive:
https://www.amazon.com/YaeCCC-Variable-Adjustable-Bench-Supply/dp/B074C86DSY/ref=sr_1_1_sspa?s=industrial&ie=UTF8&qid=1526155783&sr=1-1-spons&keywords=30v+5a+lab+power+supply&psc=1
i haven’t bought one yet😂 ill tell you how it is around December 5th
https://www.amazon.com/dp/B07512KQDW/ref=cm_sw_r_cp_api_i_o7a4DbKQXW8PN
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