I want to modify a circuit by adding a stronger drive motor. The circuit is a PCB receiver which is attached to two motors, one which steers a car, one which drives a car. The previous drive motor needed 2 x 1.5v batteries. The new drive motor needs a 12V lead acid battery. This means that 9 more volts will run through the circuit Here is a block diagram: Here is the annotated schematic: I have more information about resistances if there is a need for it. I am unsure of if the components will still work with such an increase in voltage. So it would be good if someone could advise.