Got it working!
So I had those QRE1113s on the way from digikey but I'm not particularly patient.
Amazon had some breakout boards available via prime next day that included a QRE1113 on them. I ordered a set of 3 for 5 bucks and it showed up this afternoon. I removed the QRE1113 from the board and based on the schematic for the QRE1113 and the EE-sy124 determined that the boards are just a mirror layout of each other. So with that I soldered the QRE1113 to a small piece of PCB, laid out my connections in reverse, and bam, we have a running Hudson.
Thanks everyone for your help. Figuring these little projects out is my favorite part of this hobby.
Stan - as for the resistor on that version of the board... i think thats needed in both circuits.... the newer locos look to have it on the large board in the tender. probably the resistor working as the other half of the voltage divider circuit opposite the phototransistor...?
Either way, its not on my tach board (the old broken one or the new one i made)
*Edit: Actually looking at that picture of the resistor closer, that resistor is on the ir led cathode, limiting current through the led. still something that's probably being accomplished on the tender board in ps3 version.
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