Hello,
I am attempting to modify an existing RC Car receiver circuit so that it provides full power (3xAA ~ 4.5v) for forward and reverse, and a reduced voltage (2xAA ~ 3v) for turning.
It is a simple two-motor RC that drives the motors opposite one another for turning - zero turn radius - and being that they currently go at the same speed as when going forward/back, it actually turns too fast.
My plan was to provide the (+) bank of transistors that feed the motors 3V consistently, and when the forward or reverse was pressed to activate a transistor and feed the bank the full 4.5V.
I tried connecting a lead from one of the diodes (marked in green; that meters +2.0V when either forward or reverse are pressed) to the base of an NPN transistor to supply the full 4.5V, but wasnt successfull.
Can anyone suggest a way to accomplish this fairly simply?


