Hello all, I have started learning about electronics and arduino microcontroller coding few months ago
I understand all dc motor basics and control via arduino.
I am researching options on powering a robot with arduino board with dc motor as dc generator by having one motor spinning another with battery as starter like a car.
Like in this video
I was thinking of using DC MOTOR 3Vdc 300mA 14200rpm  as one that spins
and DC MOTOR 12Vdc 180mA 11500rpm (6-14Vcc) as generator as rpm 1:1
Lets get to few things I do not understand.
If DC MOTOR 12Vdc 180mA 11500rpm (6-14Vcc) has rpm of 11500 he makes DC of 12 V and 180mA, or is there an equation for something like this?