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Tony Brummett wrote:
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cite="mid:780b16f10806260834g4b25020y4f92f21853b3a8dc@mail.gmail.com"
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<pre wrap="">On 6/23/08, Ray Whiteman <a class="moz-txt-link-rfc2396E" href="mailto:ray.whiteman@consultant.com"><ray.whiteman@consultant.com></a> wrote:
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<pre wrap=""> One thing I would point out is that I don't need to perform
set_transmitters...... Not sure if this makes any difference. The only
other question I have is, do you have the correct lirc device? Are there
more than one by any chance?
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<pre wrap=""><!---->
There's only lirc device, and since the receiver part works fine, that
can't be the problem... unless the transmitter part needs a separate
device node?
Anyway, I've come to a solution, though it's a bit on the ugly side.
I ended up building a serial port blaster, and it worked... kinda.
The STB would see most of the button press events I'd send, but for a
3-digit channel change, that meant success was well under 50%.
I ended up disconnecting the IR emitter from the serial port blaster,
and connecting the wires where it used to be directly to the leads of
the IR detector in the STB. Now it's worked 100% of the times I've
tried. I was just wondering, if anyone happens to know, if it would
be a good idea to put a resistor or diode somewhere in the line to
prevent an overvoltage problem?
-- Tony <a class="moz-txt-link-abbreviated" href="mailto:brummett@gmail.com">brummett@gmail.com</a></pre>
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In all likelihood, you would have killed it already if it was a
problem. Ideally you would make your setup place the same voltage on
the sensor as you would get from shining a remote control on it. I did
a quick search on ir detectors and see that their output can be
anything from a resistance change, to a small signal level, to a TTL
output. You would need to know what you are dealing with. Bottom line
is I would definitely use a resistor to limit the current and try and
put the same signal level there as is normal. btw, if it is a TTL
output, it is possible that using the remote could blow out your
blaster circuit. It is also possible that you could add two diodes,
one on the stb emitter and one from the blaster to prevent either from
blowing out the other. It really depends on what the stb circuit is.
Disclaimer: I give this response as a circuit designer, not as someone
who knows specifically what is in your stb.<br>
<br>
Allen<br>
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