[sdiy] Variable power supply

Tom Bugs admin at bugbrand.co.uk
Sat Mar 5 15:36:43 CET 2016


Umm, wow! That's not good at all!
Not come across this so far.. but, I've not bothered with memories 
really either.
Just set it to 15V, 500mA, put it in parallel (or whatever the mode is) 
and activate it.
I'll keep an eye out for any weirds though - thanks for the heads-up.

On 05/03/2016 14:00, Neil Johnson wrote:
> Hi,
>
> Tom Bugs wrote:
>> Last year I picked up this roughly £100-ish Tenma unit:
>> http://cpc.farnell.com/tenma/72-10500/power-supply-2ch-30v-3a-adjustable/dp/IN06824
>> It seems perfectly fine! (though if I were investing a bit more I'd sure
>> look for HP/Agilent/Thurlby etc)
> Umm, sorry to say based on personal experience I would not recommend
> those supplies AT ALL.
>
> They have a hidden 5th memory, which by default is set to max volts
> and max amps.  You get to it by accidently touching the dial in a
> certain way.  Great way to fry several prototype boards.  Not.
>
> All the ones at work now have the memories set to 0V and 0A.  Just in case.
>
> Neil
> --
> http://www.njohnson.co.uk
>

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