gunrunnerjohn posted:Since back-EMF cruise has been used for a very long time in all scales, it's hard to imagine just producing a motor driver board would be a significant issue. I suspect, as you say, that you'd probably need to buy the R4LC from Lionel for the TMCC side of the picture. That's what the folks at Digital Dynamics and TAS did for their TMCC products.
That was my thinking. As long as the R2LC/R4LC is obtainable a path to TMCC upgrades remains. While actually duplicating the design of an ERR board wouldn't be practical for legal and/or cost reasons, designing a replacement motor driver doesn't seem like a particularly difficult task. I'm uncertain about a solid-state design for older universal motors, any modern engine with a DC motor would work just fine with the same driver I used in the LC polar express cruise control, only needing a slight change to read the signals from the r2(4)lcm instead of the LC board. I think the hardest part would be the PCB layout to fit everything in a small enough package.
