[mythtv-users] Homebrew Serial Receiver Problems

Jeremy Gillick myth at mozmonkey.com
Tue Feb 27 01:14:54 UTC 2007

If the serial port does not provide power, then why do the circuit 
diagrams have a voltage regulator?


How did you build the USB homebrew receiver?  Did you just use the USB 
port for the power?

- Jeremy

John wrote:
> I could be wrong but I don't believe the serial port
> has a true power source coming from one of the pins so
> you probably won't get a steady voltage coming from
> any of the pins.
> I built a homebrew receiver but I used the USB port so
> I'm somewhat familiar with this. First of all, I'd
> reboot and do a #setserial -g /dev/ttyS* to make sure
> the port you're setting off is truly the ttyS0. Then
> once that looks good, I'd do a 
> #cd /dev/lirc
> #ls -asl
> You shouldn't have anything since you haven't
> modprobe'd yet.
> with the device plugged in do a modprobe lirc_serial
> the do a #ls -asl to see what's created based on your
> post it should be /dev/lirc/0 make sure this is
> correct.
> Then start lircd. I'd start it this way
> lircd --device=/dev/lirc/0 --output=/dev/lircd
> make sure the lircd output device was created then
> instead of using mode2 I'd use xmode2
> #xmode2 -d /dev/lircd
> push some buttons on any IR remote and you should see
> the waveform.
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