Decent sub £100 power supply

[PhilipC]

Looking to add a PSU to my bench a decent one just to find shorts and power iphones. Any suggestions?
What do you think of this one http://uk.farnell.com/tenma/72-2540/power-supply-1ch-30v-5a-prog/dp/2445412

 

[dukefawks]

Ebay is full of adjustable 5A power supplies for <$50. They will all do just fine for your intended purpose.

 

[PhilipC]

To find shorts in macbooks sorry left that bit out.
Found this what do you think?
http://www.ebay.co.uk/itm/Lavolta-Re...AAAOSwhkRWerxM

Do you find a need to have 2 outputs?

 

[aprendiz]

I have this:

http://www.mouser.com/ProductDetail/TDK-Lambda/ZUP20-40-U/?qs=F9A14TELRMsEiOBzVG37SA==

But I have to say that you dont need anythng like that, I bought it because I find it used for an amazing price (100USD).........

No need of 2 output........

 

[2informaticos]

Forget about 2 outputs; uselles for this job.
But 10A output is good to have.
A short which takes 0.6V/5A is more dificil to find than 1V/10A.
A large BGA chip, like PCH, CPU, or GPU doesn't heat easy with just 3W...

 

[peterfixit]

i just bought this piece of shit
http://www.ebay.com.au/itm/161817979114?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
will see how it goes

 

[Alan.L]

To find shorts in macbooks sorry left that bit out.
Found this what do you think?
http://www.ebay.co.uk/itm/Lavolta-Re...AAAOSwhkRWerxM

Do you find a need to have 2 outputs?

i think i've seen Jessa using one of this in her video.

 

[Alan.L]

i just bought this piece of shit
http://www.ebay.com.au/itm/161817979114?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
will see how it goes

mine look like that but under Circuitspecialists branding. its ok, does the job. the voltage is always active unless you turn the knob all the way down so i made myself this:

 

[peterfixit]

mine look like that but under Circuitspecialists branding. its ok, does the job. the voltage is always active unless you turn the knob all the way down so i made myself this:

inline resistor?

 

[Alan.L]

no, just a on off switch for more convenient so i dont need to turn off the power supply unit itself.

 

[peterfixit]

aw yeah thats pretty smart, id probably just turn off the unit, i rarely get shorts I cant find visually

 

[G.Beard]

The fact that your primary use for this thing is to short the power supply out and draw excess current in order to heat a bad part should be considered when choosing a PSU.

If you go ahead and buy a cheap PSU from eBay make sure before you use it that you open it up and check things like proper mounting to heatsinks and proper grounding and so on. The fact that it's probably been rattled about when shipped from china, and china man does not always implement the best QC anyway... Open it, check it and fix anything that does not look right.

The PSU I like to use on logic boards is a Tenma PSU like the one below but as mentioned you don't need dual tracking I just use it because it's one I don't mind killing:

http://www.ebay.co.uk/itm/72-10495-T...MAAMXQ3kNTjEXp

This PSU was also reviewed in a few YouTube videos and issues were found. The issues were sorted out by the manufacturer and the new revision reviewed again. From that point it was all good. That's why I got this one.

 

[PhilipC]

Thanks, will get the single channel one