[Discuss] [possibly OT] Advanced LIRC circuit

[J.Bakshi]

On Wednesday 17 May 2006 1:05 am, David Bronaugh wrote:
> J.Bakshi wrote:
> > On Tuesday 16 May 2006 11:10 pm, Rick Morris wrote:
> >> What does the circuit diagram look like?
> >>
> >> If you just need 12 volts, you can get that from one of the hard drive
> >> plugs rather than trying to scavenge it from the serial control signals.
> >
> > quite possible. even you can add a 12 volt battery too :-)
> > BUT all these can't provide the modularity of a LIRC circuit which steals
> > required voltage from com port. I have built LIRC receiver inside a DB9
> > box, so I am looking for an advanced circuit which can replace the old
> > circuit inside the DB9.
>
> Why not look at a USB->serial adapter? There's single chip solutions for
> it; you could probably quite easily build your own USB->IR device.
>
> Furthermore, the single-chip stuff can be easily configured (documented
> in data sheet iirc) to use TTL voltages, which if I'm reading you right
> is what the IR transceiver expects. And it'll work on any future device
> you own.
>
> Plus you can reliably tap USB for up to 500mA of power @ 5V if I'm
> recalling the specification right.
>
> David

Thanks to all the responders.

Please note

1) I have an enable COM port in Asrock mother-board and it is working well as 
I tested it with serial mouse. LIRC site clearly mentions that the receiver 
does not work failing to get the minimum voltage/current from the com ports 
and the newer mother boards are coming with minimum COM port voltage/current. 
(As mentioned by the official LIRC website)

2) plugging the serial-LIRC circuit at an USB->serial dongle is only possible 
if the LIRC driver allows this.

3) There is an USB based LIRC receiver circuit given at the official website 
of LIRC but needs to programme a motorola chip and my local group don't have 
any such programmer right now.

4) So I myself going to solve the problem :-) I have got the circuit to 
programme the motorola chip. I have to first build the programmer and then 
get my USB-LIRC receiver. Thanks to all the responders once again.
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