Connecting lilliput's IR receiver to the PC

**mox** · 06-11-2005, 06:06 PM

Considering the simplicity of a Lirc IR receiver like the one on http://www.lirc.org/images/schematics.gif, has anyone ever tried connecting the Lilliput's internal IR-receiver to the serial port?

Combined with Girder, this would be such an easy way to add remote control to the carpc!

**RS3RS** · 06-11-2005, 06:09 PM

Hmm... That's a pretty cool idea really. I'm sure someone could get pretty creative with something like that, would be handy to use for extra buttons since the touchscreen is just not that easy to use while driving for some things. Though the wirelessness of it wouldn't really matter I guess, could just use a number pad to do the same thing...

[/thinking out loud]

**mox** · 06-11-2005, 06:30 PM

I can't find any numbers on the lilli's IR receiver chip (anyone?), but I bet it has a plain open collector output, just like the one on http://www.lirc.org/images/schematics.gif

This would mean that it's not even necessary to disconnect the lilli's own internals. A single shielded wire between pin 10 of the switch pcb (see http://www.tmz.com/wrx/lilliputLCD.html) and pin 1 of the carpc's serial port would do the trick.

Edit: There's a useless number "119" embossed in my chip's housing.

**LiquidKernel** · 06-11-2005, 10:35 PM

Pretty the majority of all IR receivers on every device (even 15 year old VCRs) have the same three pin setup. Ground, Data and VCC. I am pretty sure you can just use the schematic that you posted (ignoring the VCC, since I'm sure the Lilliput has power taken care already) and tap the Data directly to your serial port.