@Norm Charbonneau posted:Nobody has ever really measured and documented all the inputs and outputs that I can recall. It might be helpful to better understand these devices in the hopes of fixing a few every now and again. Seeing what the PWM is doing along with the discrete inputs and outputs is fairly simple to measure and document. Decoding the serial line would be a little more interesting. For instance - what does the chuff input from pin 17 spit out to the serial line when triggered?
I've never seen any mysterious behavior of the PWM outputs, they're operation seems very straight-forward. Ditto for the lights, couplers, and smoke, at least for the C08 version. I've looked at the serial bitstream and can see the change with the chuff, but I never actually setup the scope to properly decode the whole bit stream. Usually, I'm just looking to see if it's getting to the serial data if I'm having a problem with chuff getting to the tender. It would be an interesting experiment, just never find the time. The bit rate is interesting, it's about 3K, a nice round number that doesn't match any standard. 
I'm guessing there's a good reason for that, probably matching up to some processor capability.
Clearly, the serial data is probably the biggest documentation task.
Truthfully, I'd be happy with the hardware design documentation, even a complete schematic would be great!
@Norm Charbonneau posted:I have no real interest in emulating the R2LC for commercial purposes, that could be a challenge for someone else of a more entrepreneurial spirit.
I'll be a spectator for this one as well. 
