[mythtv-users] Multiple IR Blasters?

Ryan Tremaine rt at bondaxe.com
Wed Jun 8 00:46:42 UTC 2005

Mike, please excuse my ignorance but my DIY electronics knowledge is limited
at best.  Does Enrique's method allow you to transmit unique IR codes to
each box? So there would be 2 light emitters? If so I'll definitely give
this a try.


-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Michael T. Dean
Sent: Tuesday, June 07, 2005 6:31 PM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Multiple IR Blasters?

Ryan Tremaine wrote:

>It took more than a few sleepless nights but I think the end is finally
>insight for a working myth install. One major question I'm having trouble
>finding an answer to is related to multiple IR transmitters. I have 2
>Comcast digital cable boxes going to 2 PVR150's over s-video. I've read the
>documentation about setting up an IR blaster but was wondering if it's
>possible to control both boxes, each with their own transmitter?
Possible, but a whole lot more work than building Enrique Vidal's 
improved serial transmitter ( http://lirc.org/improved_transmitter.html 
), which can be used as an IR blaster.

To use multiple IR transmitters, you'd have to
  a) connect each to its own serial port (do you really have enough 
serial ports for this approach?) and install multiple copies of LIRC 
such that they don't interfere with each other (i.e. as shown at 
  b) rewrite LIRC's serial driver to support multiple transmitters using 
the different pins of the serial port.  This would also require 
rewriting most of LIRC to support multiple devices (transmitters/receivers).

To use the improved serial transmitter, you'd have to
  a) throw together a bunch of electronics components
  b) get a friend to throw together a bunch of electronics components

I highly recommend the improved transmitter.

Good luck,
mythtv-users mailing list
mythtv-users at mythtv.org

More information about the mythtv-users mailing list