You could replace the IR module on the Flirc with this chip (it's not compatible pin-to-pin so you could not solder it directly on the board but with some short wires). If I'm right then you would need to buy VSOP38338 which is an IR demodulator module without the IR receiver built-in. Of course there is a change that the repeater system you have is actually using demodulated data but I doubt it because it would require an extra logic inside each of the transmitters and they probably are just a simple IR transmitter diodes. I think that the repeater system may be using a RAW modulated IR signal instead of a demodulated one. Flirc is not designed to receive such signal and wont recognize the input even if you pass it through an optocoupler. You could easily fry the microprocessor by connecting something that is not designed to connect to these pads. These pads are for testing or programming purposes and are probably connected directly to the microprocessor. If I understand correctly, I think the optocoupler will demodulate the incoming IR signals.įirst of all I've already told you that the pads on the back side of the PCB weren't the same as the ones for the IR module on the top side. I researched some more and found a relevant post at avsforum. I plan on using an optocoupler with 2 legs connected to the FLIRC and the other two legs connected to the 3.5mm mono plug (essentially in between the Flirc USB and the 3.5mm mono plug). When I tried to teach the Flirc some remote codes (through the IR receiver on my IR repeater system), the USB would disconnect/reconnect to my laptop and the software would flash a "Transfer error." The device registered some action, but it was not the expected input and the hardware/software crashed. I hooked this up to my IR repeater system and the Flirc USB to my laptop. Using a multimeter on the continuity testing mode, I figured out the solder pads underneath the circuit board and those under the IR receiver were not the same. I soldered the two leads from my mono plug to the "OUT" and :Ground" pins under the IR receiver. I removed the surface mount IR receiver and had direct access to the solder pads underneath. With this knowledge, I played around with the unit last night and came to the same conclusion that simply soldering the leads of a plug will not work. From some snooping around on the Vishay website, I figured that the receiver on our unit was like the TSOP752 and all the variants have the same 4-pin layout so pin 3 = Signal Out.
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