[mythtv-users] IR Transmitter

[Dan Morphis]

To build the simple circuit, you'll need a few parts:

1 x 1N4148 diode
1 x 3k ohm
1 x IR LED (Can be scavanged from an old remote, or you can use LD 271)
1 x Soldier style db9 male

Soldier a wire on to pin 4 of the db9 header.  Take the other end and 
soldier it to the anode (The end W/O the black line) on the diode.  Take 
the other end of the diode and soldier it to one end of the resister.  
Take the other end of the resister and soldier it to anode of the ir led 
(The side w/o the flat spot [someone please correct me if I have that 
backwards]).  Take the other end of the ir led and soldier it to pin 5 
of the db9 male connector.

You should be looking at less than $5 in parts.  If you want a quick way 
to test the circuit, fire up the camcorder and look through the view 
finder while lirc is sending a signal.  A quick way to send the signal 
is: irsend SEND_START <REMOTE_NAME> 1

Hope this helps.  Feel free to ask any questions you might have!

-dan

rick-myth at perlmonkey.org wrote:

>I do own a sodering iron and I have sodered in the past, but only once or
>twice, and it was very basic (soder this wire to this spot).  If you
>remember a specific post that you think would help, I appreciate it.  I
>thought I gave the archive a pretty extensive search.
>
>Thanks Dan
>Rick
>
>  
>
>>Rick, before I dig a bit and find the post, do you know how to soldier
>>or have access to a friend who knows how? (Plus have access to a
>>soldiering iron?)
>>
>>-dan
>>
>>rick-myth at perlmonkey.org wrote:
>>
>>    
>>
>>>I have the good 'ole SA2100, so no luck w/ the serial port.  I actually
>>>currently have a TiVo Series 1 (14 hr.. ewwwww), Figured a Myth w/ 200GB
>>>hd should keep me going for a while.. Unfortunately, I wasn't
>>>exaggerating
>>>when I meant I know nothing about electronics.  I searched the archive as
>>>Dan suggested but only found references to the 'simple' and 'improved'
>>>transmitters, I don't know where to begin even with the simple one (not
>>>to
>>>mention the possiblity of port dmg, if (when?) I screw it up.)  I did
>>>come
>>>across http://store.snapstream.com/irblcapa.html but it's backordered
>>>till
>>>mid April.  Unless I can find an absolute Electronics Beginners Guide to
>>>building this thig, I think I'll just have to stick it out and wait.  Any
>>>other suggestions would be welcomed.
>>>
>>>Thanks for the help guys.
>>>Rick
>>>
>>>
>>>
>>>      
>>>
>>>>On Mon, 2004-04-05 at 18:27, rick-myth at perlmonkey.org wrote:
>>>>
>>>>
>>>>        
>>>>
>>>>>Hey guys, I'm pretty new to mythtv, I'm about to build my mythtv box,
>>>>>Just
>>>>>waiting for the PVR-350 and the case =).   Anyway, to my question.
>>>>>I've
>>>>>been going through the documentation and the myth-user archives to find
>>>>>out what exactly I need to control my digital cable box, and the answer
>>>>>I
>>>>>have found is a Serial -> IR Transmitter. My search for one of these
>>>>>has
>>>>>led me to two possible solutions
>>>>>
>>>>>
>>>>>          
>>>>>
>>>>If your digital cable box is a Motorola DCT-2000 series you can control
>>>>it with a serial cable. The firmware has to be version 7.54 or higher.
>>>>To check go to Menu->Setup->Cable Box, then choose "Yes" to "See
>>>>Configuration".  Then you just need a standard male to female 9-pin
>>>>serial cable.  There's a program in the contrib folder to send the
>>>>correct signals over the serial port.
>>>>
>>>>Your cable company may need to enable your box for serial control (mine
>>>>was already setup, but I hear that isn't always the case).  If the
>>>>firmware version is right, but serial control doesn't work call them and
>>>>say you have TiVo and would like to have serial control enabled.  Since
>>>>everybody knows what a TiVo is, it's the easiest way to explain what you
>>>>need.
>>>>
>>>>--
>>>>James Orr <james at orrwhat.net>
>>>>
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>>>>
>>>>
>>>>
>>>>        
>>>>
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>>>
>>>
>>>      
>>>
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>>    
>>
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