🚀 go-pugleaf

richard kimber <479kimber@comcast.net> wrote in message
news:oEudnc54jsu4eY2jXTWcqA@comcast.com...

> I have a switching pc power supply off a 4 year old PC presently
> configured for 220 V AC input and I would like to alter it to run on
> 110V input.  The label says that it is a dual input type and that it
> may be switched accordingly.  However, there is no such switch
> and I'm wondering whether two free terminals on the PCB with a
> rectangle drawn around them (labelled 110V - 220V) represent the
> location where two switch leads are intended to be soldered in place

Yes.

> and when the switch is thrown to closed
> circuit thereby joining these two terminals

Probably. Have a look at
http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=cir_ps_at_001&PHPSESSID=f9fba1bc8d09aecd162dcd3c5c3f0a8e
and see how its usually done.

> - whether that is a voltage halver (it seems to connect
> to some resisters that might have that effect).

Technically it doesnt work like that, but the detail doesnt really matter much.

> If so, then I plan to solder in a bridge.

That'll work fine. Just check that the circuit is basically the same in that
area. I havent noticed any that do that 110/220 switching any other way.