Here's an update on the transponder project:

I had time yesterday at the track to test nine out of the ten programs I created by observing the pulse trains of the MRT PTX Number Set Two. All nine functioned correctly. (I would have tested all ten programs, but I inadvertently made two copies of the program for the same number!) This was using the perfboard prototype shown in the first post, mounted in a 1/10 scale 235mm-wide pan car.

I also had success with the program for the custom number from one of my MRT PTX transponders. I still need to record the pulse train for the custom number from my other PTX.

Printed circuit boards should arrive by the end of the week!