Hi!
I also got 2 of the Atlas robots from my school! Im a newbie to programming but know a little about electronics and want simple speed control of at least 2 motors for a project.
How did you manage to use the driver? I got the same as in your picture. trying to figure wich pin/pins to send signals to and what kind of signals they need.
looking at the datasheets for sdb 250, 555, and 7407, and trying to understand.... Could you help me out?