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There will be no reverse. I've actually discovered that using a single transitor instead of the photocell will work better, so in order to do that, I'll need the reverse lead off the PCB as a common emitter.
I've also decided to build a rail chassis from scratch and make this thing a full blown dragster. The setup above would work, and fit inside most stock bodies, especially since the huge relay isn't needed, but lifting the PCB each time to change the batteries would break the steering wires off more times than I care to solder them.
I've gone with a standard ZZ PCB with it's minimal features more for weight purposes than anything else. Proportional anything really isn't needed for this application.
SO, in essence, this project is really no longer a ZZ, though the initial idea could certainly be incorporated into one.
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