A 12V *AC* power supply

[Michael Shiloh]

I would expect it to work with 12VDC. It's unlikely that they run it 
through a transformer, and probably just rectify it, in which case 
you'll drop a volt or so.

If it doesn't work the first time you hook it up, reverse the polarity.

Worst case, they run the 12VAC directly into a switching power supply, 
in which case it won't damage anything, it just won't work.

On 07/12/2010 11:13 PM, Shachar Shemesh wrote:
> Hi list,
>
> I bought a USB connected logic analyzer for too much money (not that
> much). When buying, I did a mistake and not thought through the issues,
> and bought from a US supplier without telling them this needs to be a
> 220V country. As a result, I got an external power supply that is 110V,
> which outputs 12V AC at 1000mA (why they do not write "1A", I do not know).
>
> To my shame, I actually bought a universal DC supply without noticing
> that it's AC I need, and started a support call with the company. They
> were very nice, and when we, finally, found out the source (I hope it is
> it), the guy said I could probably get by with 18VDC, but it would
> strain the capacitors (my math suggests that 15VDC is closer to the mark).
>
> So, does anyone know where I can get a 12V AC power supply? They are not
> exactly a commodity.
>
> Thanks,
> Shachar
>
> --
> Shachar Shemesh
> Lingnu Open Source Consulting Ltd.
> http://www.lingnu.com
>
>
>
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