I tried doing this in spice... but I got completely lost. That looks like a great program, but it will take me a while to figure out.
So, I tried just reading the articles you pointed out, and I think I understand transistors better now. Here's my latest version that I believe makes more sense.
*** Edit: Fixed image, missed 2 connection dots.
For the resistors, my guess is that R3 should be higher than R1 and R2. I'm thinking R1 and R1 should be 1K, and R3 should be 10K. Does this sound right? If not, what would you recommend?
For the transistors, what would you recommend? I need it to be able to handle the amps of the motor being seized without smoking anything. I am using another circuit to check the actual rpm of the motor, so the motor won't be seized for long. It will make a few attempts to run the motor, but if it can't get the motor running, the whole thing will shut down.
Soeren: I don't mean to ignore your comment. For this project, I would prefer having the opto-isolators there since this is connected to 2 AC power sources. I want to limit the damage if something goes seriously wrong. Replacing motor controllers would be much cheaper than replacing my main board.
In the future, I may need more than 12 volts...