T i m wrote:
On Fri, 29 Dec 2017 22:18:31 +0000, Bob Minchin
wrote:

snip

Back to a 'proper' SMPSU of some sort. ;-)

Cheers, T i m

Tim Try this type

http://tinyurl.com/yad37u9v

https://www.ebay.co.uk/itm/DC-12V-LE...zaBQZFSKMFnD2g

Thanks for that Bob.

I actually have that type of PSU (12V 20A or so) in my 3D printer but
it came as part of a kit (so I didn't spec it as such).

There are lots of vendors on ebay and they possibly all come out of the
same factory.

Quite possibly. A mate had some specialised garage kit that had a
similar PSU in it that was knocked out during a lightening strike. I
found him an exact replacement online that was about 45 quid including
next day delivery ... the suppliers of the garage equipment wanted 200
for the same thing. ;-(

I've used a number for various electronic applications.

Good to know. Oh, I did help wire a couple more up used as CCTV power
supplies. ;-)

The regulation is good and the output voltage is trimmable by a few %
either way and there is no minimum load.

OOI, what sort of overhead (if any) would you set on the capacity of
such a solution?

Say I measure 3A peak on boot and 2A when running but idle, would a 5A
model be overkill?

Cheers, T i m

That sounds a sensible working margin to me Tim

Good Luck

Bob