[mythtv-users] Desk Top Power

Philip Brady phil.brady at hotmail.co.uk
Fri May 15 18:45:54 UTC 2015



> From: mythtv-list at dinkum.org.uk
> Date: Fri, 15 May 2015 07:56:36 +0100
> To: mythtv-users at mythtv.org
> Subject: Re: [mythtv-users] Desk Top Power
> 
> 
> On 15 May 2015, at 00:24, Daryl McDonald <darylangela at gmail.com> wrote:
> 
> > Has anyone had success powering Ethernet switches, HDHR's, or Set Top Boxes from the power supply of a PC? 
> 
> I did this many years ago, bought a 100Mbps switch while working in the US when such things were rare and expensive in the UK. It came with a US only power supply, online order and there was no mention of these details. Not wanting to spend money on a UK power supply I made an adaptor to plug the DC cable in to a 4 pin molex connector inside the PC, it wanted 12v at an amp so easily compatible. All worked fine for many years, anything I wanted to stay connected when the PC was power cycled was connected to the existing 10Mbps hub or the thinnet 10base2 cabling, that’s how long ago it was…
> 
> 
> > I can see 5 or 12 VDC among the red black and yellow wires, I know it would be polarity critical, and I really only need the gadgets when the PC is on, or turns itself on.
> 
> Provided your PSU isn’t on the edge and the other kit wants 12v or 5v you should be fine.
> 
> There could be some issue with interference from the external device getting back in to the PC and upsetting sound output or harddrives but that depends on the design of the external equipment, input filtering on them should remove that sort of thing.
> 
> Andre
> 
> > 
> > Any ideas pro or con? 
> > _______________________________________________
> >

There is a very cheap solution to this. I have used an intelliplug here in the UK but I do not know if it is available for your voltages and socket types.  It switches subsidiary devices on or off in response to the primary being switched.Phil
 		 	   		  
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