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PostPosted: Wed Feb 08, 2006 8:20 pm 
I am planning on purchasing a Harmony 676 remote control. From what I understand, the remote does not come with an IR receiver. I would like to just buy one, but I'm having trouble finding places that have them. Radio shack has the IR stuff for making your own, but I would like a prepackaged deal. Are there any local US retailers that sell premade IR receivers that would work with MythTV?

How difficult is it to build your own receiver? I have soldering experience (modchip installation), but I have never bought circuit board and components. Any advice?


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PostPosted: Wed Feb 08, 2006 10:55 pm 
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Joined: Tue Jul 12, 2005 8:01 am
Posts: 670
Location: Salem, MA
It's really easy. Check out the circuit here:
http://www.lirc.org/receivers.html

I was able to get all the parts from digikey (http://www.digikey.com)
Except for the serial port adapter, I picked one of those up from Fry's Electronics (Radio Shack should have them too). I went with a RJ45 jack one and used a piece of ethernet cable to go between the receiver circuit and the serial port.

So far, mine's still on a breadboard, but the frontend i'm using it for isn't even in a case... It works great, though. the receving angle is real wide, and you can essentially program any remote. If you're looking to buy a homebrew receiver look around for those links on http://www.lirc.org.

Avoid retail receivers. I bought the creative CIMR100 thinking I could program it to work with another remote, but it only works with the (crappy) bundled remote.


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PostPosted: Thu Feb 09, 2006 7:36 am 
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Joined: Tue Feb 07, 2006 2:28 am
Posts: 8
I have ordered a IR-receiver module for the serial port here: http://www.zapway.de/e_index1.htm

My plan is to use it with a Harmony 885. Don't know if it will work, but there is a good chance.

From http://www.lirc.org/receivers.html

Quote:
The following page will show you how to build your own infrared receiver for the serial port. Please note that the serial port driver in the LIRC package only supports 8250 compatible UARTs (this includes the most common 16450 and 16550A types). That means that it won't work with exotic multi-port cards that need a special driver. If you'd rather buy some device than solder your own circuit I recommend the receivers from www.zapway.de


/FAF


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PostPosted: Thu Feb 09, 2006 9:05 am 
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Joined: Tue Apr 13, 2004 6:51 pm
Posts: 890
Location: Groton, MA
I agree with the ease of building your own reciever....you dont need a circuit board, you can just solder the 5-6 pieces together in a small bundle. I did this as my first soldering project ever...easy and successful.

I mounted my circuit in a small block of wood to give it enough weight to stay where I put it. All pieces from Radio Shack...$10 I would say.

_________________
R5F1 - Dell P4 2.4Ghz 500MB - PVR250 x 2 - GeForce FX 5200 - Onboard sound/NIC 80GB ATA/250GB ATA/400GB SATA


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PostPosted: Thu Feb 09, 2006 9:44 am 
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Joined: Tue Feb 07, 2006 2:28 am
Posts: 8
It's not difficult making your own, but I chose the easy solution...

www -> order -> wait -> open-package -> connect -> configure -> play

Rather pay $25 and recieve by mail, than all that fuzz..find a store, get the components, solder... before you look around 1-3 hours has passed, if everything goes well.

Just my humble opinion... and yes, I have years of soldering skills. I'm not lazy, just resonable.

No offence.

/FAF


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PostPosted: Thu Feb 09, 2006 10:38 pm 
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Joined: Tue Jul 12, 2005 8:01 am
Posts: 670
Location: Salem, MA
I thought it was fun...

Not only that, but for the cost of less than one pre-made one I have the makings for at least four that I can make myself. I know I'll be making at least one more, and after that I have spare parts. I'm already looking for new electronic projects :)


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 Post subject: IR Header on motherboard
PostPosted: Mon Apr 03, 2006 5:17 pm 
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Joined: Thu Nov 20, 2003 6:23 pm
Posts: 17
Location: Seattle, WA, USA
I need to add an IR receiver, because I'm moving from pvr-250 to -500 (white box) which doesn't have any IR.

The homebrew serial IR sounds interesting, but I'm wondering about the built-in IR on my motherboard..

My shuttle (SN41G v?) has this 6-pin IR Header, and I've seen the same thing on all my recent motherboards, but have never seen a receiver to plug into it. The manual just says
Code:
IR Header (JP5)
  If you have an Infrared device, this mainboard can implement IR transfer function. To enable the IR transfer function, follow these steps:
Pin Assignments:
1=NC             2=KEY
3=+5V            4=GND
5=IRTX           6=IRRX

It looks like possibly I could wire an IR IC directly to that (on pins 3,4,6?).. and see what happens? If anyone has any input, I'd love to hear it :D

If this works, all the wiring would be internal, and I could just drill a hole to poke the IR led out the front of my system.


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