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

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giorgoskok
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Texas_Ace wrote:
giorgoskok wrote:
Texas_Ace wrote:
I used one of those 48V 3A power supplies for my last DPS3012 and it would handle 12 amps up to around 12 volts or so before it would start dropping voltage.

I was thinking of getting a 24V 10A psu (16$) for my DPS3012 , any other suggestion ?

That will work fine and it is rare that you would need more then ~22v really anyways.

The Dell sever power supplies posted earlier are the best bang for the buck for sure, great supplies and cheap. Thats what I would recommend as long as the price doesn’t increase.

Thanks

Flintrock
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Texas_Ace wrote:
I used one of those 48V 3A power supplies for my last DPS3012 and it would handle 12 amps up to around 12 volts or so before it would start dropping voltage.

 

Sounds incredibly good.  12 X 12 is 144 W,  3 X 48 is also 144W.  I'm amazed it did so well! Either it's underspecced slightly (as quality things should be) or the DPS is 100% efficient.  Either way, the supply specs were not exaggerated.

 

He said he wanted 6A at 20V.  Sounds like it will likely provide 6A even at 24V.  A 10A 24V supply obviously will too, but obviously won't go above 24V either.  Seems like one of each is the obvious solution Smile

 

 

 

Texas_Ace
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IIRC it was somewhere in the 11v range that is actually started dropping voltage but I was never able to really test it properly for more then a few seconds as I didn’t have a way to provide that much load at higher voltages easily.

That said the DPS is 9X% efficiency by mine and others tests.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

Flintrock
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So that fan doesn't seem to me to be PWM controlled or voltage controlled or throttled at all actually.  Mine just turns on at 10A and turns off at 9.5.  There is an n channel mostfet (SI2302, says A2sHB on it) connected to the negative lead, but that's not a PWM fan.  So that fet is just turning it on or off and leaving it there.  

 

I'd like my case fan to be on all the time probably, and that's easy.  Because, being that's an n-channel switch, the positive side of the fan always has 5 volts, so just get the +5 from there and ground from the input supply ground and you have an always on external fan. I was fearing I might have to go digging for 5V on some very tiny solder connections.

 

What I don't know is is the 10A turn on fixed under all conditions or does it turn on lower under high power? I have a suspicion it's fixed and 10A and 20V is quite a bit of power for now fan.  Anyone tried a combination like that?

 

 

Texas_Ace
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My fan sure seemed to get louder as the DPS3012 started to heat up. Possible they just turn it on full blast with the 5015 due to the higher power ability though.

Come to think of it the 3012 would kick on around 6A or so IIRC so they must be set up differently.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

HKJ
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Flintrock wrote:

What I don’t know is is the 10A turn on fixed under all conditions or does it turn on lower under high power

It will turn on earlier in some cases.

My website with reviews of many chargers and batteries (More than 1000): http://lygte-info.dk/

Flintrock
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HKJ wrote:
Flintrock wrote:

What I don't know is is the 10A turn on fixed under all conditions or does it turn on lower under high power

It will turn on earlier in some cases.

 

Ok, that's good news.  Well, and maybe it will  ramp up to higher voltages too.  Maybe I jumped the gun on this assessment and just haven't pushed it hard enough yet.

HKJ
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Flintrock wrote:

Ok, that’s good news.  Well, and maybe it will  ramp up to higher voltages too.  Maybe I jumped the gun on this assessment and just haven’t pushed it hard enough yet.

I have not noticed any speed regulation on the fan.

My website with reviews of many chargers and batteries (More than 1000): http://lygte-info.dk/

raven38571
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Inside the Dell EPS-470 there is an ATX connector with 12V supply. I’m going to use it to power a 120mm fan.

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For those that want to use an ATX or other simular low voltage power supply this same company just released a new buck/boost version of the power supply module.

It outputs 0-32V and the input is 6-40V with a 5A max current.

https://www.aliexpress.com/store/product/RD-DPH3205-Buck-boost-converter...

This really opens the door for more compact and easier to build power supplies if you do not need the higher current and voltage abilities of the DPS5015

It is on sale during the introduction for $28.99 for 3 days, grab it while you can, they always do this when released and the price DOES go up after that.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

gauss163
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In case anyone missed it due to its very obscure location, HKJ has posted an informative review of the DPS5015. I recommend that for wider exposure it be moved to the charger (or battery) forum, since it can be used as a powerful universal CC/CV charger.

Texas_Ace
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Great, glad to see an official test. Basically what I figured it would show.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

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Texlite wrote:
Thanks for this, I’ve looked for a reasonably priced power supply capable of greater than 30V and 10A for close to a year. The sub $100 10A 30V power supply’s are easy to find, and it’ll work for most of the emitters we use here, but I’ve got some projects coming up with COB LED’s and they’re usually have a Vf around 36V. Reasonable 50V power supply’s are also fairly easy to find, but most often have current outputs below 5A, and some even below 3A, which knocks out high-amp/low-Vf LED’s.

Until this it seems it’s been a choice between either high amp, low Vf tests, OR high-Vf, low amp tests.

This seems to fill the void IMO.

Off to read the other threads before I spam you with questions lol.

-Michael


Please post how those projects go. I already have people asking what can be done with COB’s…

Terry White

Jerommel
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FINALLY
my power supply arrived. Smile

Looking for:

5” parabolic reflector (for recoil light)

Texas_Ace
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Tests were done in this thread: http://budgetlightforum.com/node/50274

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

HKJ
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Guy Fawkes wrote:
Looks to be running at about 97+%? It is hard to make out from pic.

Not that hard, the magenta curve shows the power loss in it. The maximum is about 10W in all the test I have done, the only significant exception is when I am very close to the current limit.

My website with reviews of many chargers and batteries (More than 1000): http://lygte-info.dk/

gauss163
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Guy Fawkes wrote:
I am considering a DPS5015 for a supply adjustable to 35.76v 9.45A Have you done any tests that would give an efficiency estimate for DPS5015 @337W?

My (rough) numbers are consistent with those reported in HKJ’s tests (within ±0.5W on power loss for similar ranges for the random values that I cross-checked)

At 47.7V in, 36V/12A out I got 7.8W loss, 98.2% efficiency.
At 48.3V in, 36V/08A out I got 3.9W loss, 98.7% efficiency.

Based on these and other reports I think we can rest assured that it is generally quite efficient. So much so that I am currently using it housed in a (fanless) tiny box that fits in the palm of my hand – see below. This can easily handle 500W loads (where the internal case temp rises about 25F above ambient). I use this with my powerbanks when I need a portable adjustable power supply. Please excuse the shoddy workmanship (it was constructed while I was at a friends place without access to any decent tools).

The case is from a Dell DA2 power supply (< $10 on eBay) that was cut in half. In the rear are powerpole in/out for high current, and standard DC 5.5 × 2.1mm barrel in/out connectors for low current apps. Further there are two 4mm banana jack outputs in front (lower right corner). It’s proving to be quite a convenient tool. If anyone wants further details let me know.

Texas_Ace
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Here is the Design for the Acrylic case I made in case anyone wants to make one. It is cut out with a laser cutter from standard hardware store .08” acrylic sheet (“plexiglass”). Thicker acrylic would be stronger but costs a lot more and is much harder to find.

Proper acrylic glue will be stronger and look better but hot glue or super glue works just fine as well.

http://www.thingiverse.com/thing:1982235

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

whopist
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It has been over 3 months since I posted my plans for this ‘build it yourself’ power supply in Post# 73 of this thread. Here it finally is.

PowerSupply photo PSsm_zps8wnc0cck.jpg

Parts Used:
Dell EPS-470 Power Supply, output rating 4mVdc, 9.6amp (Added power switch) $27.
DPS5015 buck controlled power supply $38.
Cooling Fan, 50mm 5v $8.
Connectors for test leads $10.
Misc. scrounged box and hardware $0.

I am quite pleased with it and thanks Texas_Ace for all your assistance.

Texas_Ace
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Looks good! It is always interesting to see peoples different build styles with these.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

sac02
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I am impatiently waiting for my DPS5015 to arrive.

I contacted the seller through AE and asked if he was still doing BLF348 discounts,he said not officially but he would sell me one for $34.

I submitted an eBay “make offer” on one of the EPS-470 power supplies and scored one for $25.

Looking forward to putting it together, mine is also going to be assembled in a “case” made of whatever I have laying around.

Big thanks to all in this thread and elsewhere who dream/scrounge up these great budget ideas for the rest of us to steal.

NeoGeo
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With the DPS3012 is that a power supply supplied with the control unit, ie I don’t need to buy a separate supply for it?

Texas_Ace
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All of the modules in this thread need a separate power supply for them to work.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

sac02
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I received mine in the mail earlier this week and haven’t had a spare minute to even unbox and test it! It’s driving me crazy!

This weekend…

Enderman
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Is the DPS5015 the highest power unit of this brand?
No DPS over 750W?

Texas_Ace
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It is the highest at this point that I know of.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

NeoGeo
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Ah right. So I’m guessing the external board connected to the DPS3012 is just because the control unit isn’t big enough to contain the beefier components?

Texas_Ace
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Yeah, for that kind of amperage you need way better heat sinking then the self-contained display setup allows.

If guns cause crime, then pencils cause misspelled words.

In general, the art of government consists of taking as much money as possible from one party of the citizens to give to the other. -- Voltaire (1764)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

Complete collection of all my LED tests

NeoGeo
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Thanks, suddenly all becomes clear. Smile

NeoGeo
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Would this be a good match for the DPS3012?
BG link

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