[mythtv-users] Hooking Hauppauge NOVA-T remote to NOVA-T-less frontend ...

Dawson, Guy Guy.Dawson at eu.sony.com
Thu Aug 10 09:04:18 UTC 2006

> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Jules Gosnell
> Sent: 09 August 2006 17:46
> Dawson, Guy wrote:
> > Jules
> > 
> > There are some circuits on the LIRC website, and at
> > http://www.linuxjournal.com/article/8811 which show how to build a 
> > serial port receiver, using an 'IR detector' and some other 
> bits and 
> > pieces.
> > 
> > The methods that I recall seeing for connecting the Nova T 
> IR receiver 
> > to a serial port lead me to believe that these receivers 
> are basically 
> > just one of these detectors in a nice(?) plastic moulding 
> on the end 
> > of a lead.
> > 
> > This is born out by 
> http://www.irblaster.info/hauppauge_ir.html, who 
> > is where you can buy a replacement receiver for a Hauppauge 
> card.  If 
> > you look at the bottom, it pretty much spells it out.
> > 
> > So to make use of the receivers that you have, you will 
> need a circuit 
> > like those above, which will take care of the 12/5 volt 
> issue, and a 
> > suitable socket (unless your going to cut the plug off!)
> > 
> cool - so I need :
> a) female 2.5mm jack (into which to plug my NOVA-T IR eye)
> b) a plug that fits the internal COM2 socket on my m/b
> c) some way of dropping the voltage from 12v to 5v
> d) the pinouts at either end
> assuming that I can get hold of (a), (b) and (d), how might I achieve
> (c) - I know nothing about electronics :-( Can I just wire in 
> some form of small/cheap resistor on one of the wires that 
> carries the voltage, or is it more involved that that ?
> this would be a really useful gismo for anyone who is 
> splitting a hauppauge-driven system into separate front and 
> back ends :-)
> sorry to be so dumb, I am way outside my field of expertise here.
> thanks for all the help,
> Jules

You **really** need to be aware that I have not yet attempted this.
It's on my to-do list, someway off the top.  When I get round to
replacing the machine under the telly with a diskless front-end, then
I'll need it.

Having said that,  I see no reason why what we are discussing will not
work.  In fact, as per my original reply, I **HAVE** seen this done
somewhere on the web. I have a clear recollection of a photo of one that
someone had made.

If I where to do it now,  I would start with the circuit from
http://www.cesko.host.sk/girderplugin.htm, (except that LIRC expects the
signal on pin 1 not pin 6).  My research indicates that the Hauppauge
receiver is just a packaged 'IR detector', with pin-outs as per
http://www.irblaster.info/hauppauge_ir.html (at the bottom ).

Like I said, it should work, but I can't be sure without trying.

BTW I assume that backend is not in the same room as the front-end.
Although I not tried with Myth, LIRC is actually a network server,  and
the software using it need not be on the same PC.


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