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What benchtop power supply do you use?

J

jcclow

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I'm looking for a decent benchtop power supply that won't break the bank. I was looking at this Mastech HY3005D, but that sounds too good to be true. I'd like to be able to efficiently power my Arduino projects as well as some larger, work related LED projects (1W to 5W LEDs).

Thanks!
 





Bionic-Badger

Bionic-Badger

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I got this one from MPJA. It works good for me but I do wish I had a smaller portable one so I could do tests outside the room where the one above is. I've even hauled that one above around to do the tests, but it's not convenient.

If you're going to power Arduino stuff, you might think about getting one of those 5V wall warts or those AC-DC power supplies instead. They're fixed voltage, but quite a bit cheaper and smaller--good for lasers. Use that Mastech if you need something adjustable.
 
LtKernelPanic

LtKernelPanic

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I have the 3A version of that supply that works well. I wish I had bought that one instead because the 3A one doesn't have the fine control like the 5A.
 
jeffreythe00

jeffreythe00

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I have two power supplies.

Lambda 122A FM, 20V 5.7A Regulated PSU
(No brand name?) 7.5V 30A, Regulated PSU

Both work flawlessly and I barely paid anything for them.
 
Last edited:
Fiddy

Fiddy

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LtKernelPanic said:
I have the 3A version of that supply that works well. I wish I had bought that one instead because the 3A one doesn't have the fine control like the 5A.
Click to expand...

Yeah true, why 5A unit has Hi and Lo mode which changes the ammeter to mill amps cant remember if it does mV too, it lives at work :D but the 10 doesn't have that luxury.
 
ARG

ARG

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Fiddy said:
Yeah true, why 5A unit has Hi and Lo mode which changes the ammeter to mill amps cant remember if it does mV too, it lives at work :D but the 10 doesn't have that luxury.
Click to expand...

I got a 5A one and doesn't do mV, but I love the range switch! :)
 
Cyparagon

Cyparagon

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All except my 0-18V 0-3A mastech are used from ebay, some as old as 1963 and still working very well. All <$100, most <$50


Kepco 0-2000V 0-2mA (linear)
HP 0-320V 0-0.1A (linear)
Lambda 0-40V 0-1.7A(linear)
Lambda 0-20V 0-3.3A (linear)
two Tenma 0-30V 0-5A (switching)
Sorenson 0-45V 0-20A (linear w/ triac pre-regulator)
two HP 0-20V 0-50A (linear w/ triac pre-regulator)

And a few other smaller ones and broken ones I'm repairing.
 
Blord

Blord

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I use this bench PSU, YiHua 0-30V 0-5A. It suits for testing diodes. Just remember to dial zero and shorten the leads before you connect the diode.
The fine tune knob Hi/Lo is a nice feature but the smallest readout is still 4/5mA.

labpsu.jpg
 
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J

jcclow

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Yeah, I like the fine adjustment offerings also.

Fiddy said:
i use this guy: Digital Adjustable Variable DC Power Supply 30V 10A Sustain MAX 4 Hours at 300W | eBay
Click to expand...

That is a sweet PSU if for only one reason...BLUE LED DISPLAYS! :D ...but 10A, that's pretty impressive too for $148 US...but the shipping and time frame from Australia...not good.

Bionic-Badger said:
If you're going to power Arduino stuff, you might think about getting one of those 5V wall warts or those AC-DC power supplies instead. They're fixed voltage, but quite a bit cheaper and smaller--good for lasers. Use that Mastech if you need something adjustable.
Click to expand...

I had been thinking about one of those also (the table top, metal case designs). I literally have a box of wall warts from 5V 500mA all the way to 12V 2A. I'm thinking about the adjustable ones for the future and what I may get my hands dirty with.

Cyparagon said:
Kepco 0-2000V 0-2mA (linear)
HP 0-320V 0-0.1A (linear)
Lambda 0-40V 0-1.7A(linear)
Lambda 0-20V 0-3.3A (linear)
two Tenma 0-30V 0-5A (switching)
Sorenson 0-45V 0-20A (linear w/ triac pre-regulator)
two HP 0-20V 0-50A (linear w/ triac pre-regulator)
Click to expand...

I'm Googling these now to see if I can find any...thanks for the info!
 
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LarryDFW

LarryDFW

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jcclow;

I have used a Mastech, but this Extech is a much better supply:
digsupply.jpg

The 4 Digit readout allows plotting diodes with enough digits.
Here I am charging the newest lithium ion #18650's to 4.35 VDC.
The 5 amp capacity allows charging several cells at once.
I can get a good price on these, if anybody needs one.

LarryDFW
 
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M

Multimode

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Here's my baby - 20V 10amps.
I like the MPG to for setting, accurate and not at all twitchy.
ATB
MM
img7869p.jpg
 
Last edited:
awillis2589

awillis2589

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LarryDFW said:
jcclow;

I have used a Mastech, but this Extech is a much better supply:
digsupply.jpg

The 4 Digit readout allows plotting diodes with enough digits.
Here I am charging the newest lithium ion #18650's to 4.35 VDC.
The 5 amp capacity allows charging several cells at once.
I can get a good price on these, if anybody needs one.

LarryDFW
Click to expand...

Could you pm the price on one of these if you don't want to post it here?
 
richard86

richard86

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*
Bench power supply EP-613

** 0-30V output, capable of 2.5A
*** Auxiliary 12V and 5V outputs, 500mA each
*** Digital voltage and current displays
*** 0.1V voltage resolution, 10mA current resolution
*** Current limiting with limit-reached indication
0A200774-3813-4BFF-98A4-6F65E68D962E-8142-0000031E5656637F_zpsa142f333.jpg


Paid around $60
Ive noticed that the amperage goes to 2.95amps

Has anyone used one of these before?
 
LarryDFW

LarryDFW

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Cyparagon said:
Is it 4 or just 3½?
Used 4½ digit DMMs can be found on ebay for <$30
Click to expand...

It has a full 4 digits on Voltage & Current Ranges.

That is one of the reasons I picked this model.

Also liked the digital control of the adjusting dials.

Larry
 
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