Simple circuit to turn robot chassis with DC motors into RC car? Answered
I want to convert a robot chassis with two DC motors, like this one:
into a basic RC car. Ideally, I'm looking for an off-the-shelf solution consisting of a remote with two joysticks (for tank-style steering) and a paired breadboard-compatible receiver that outputs, for each channel, either (a) an analog voltage (say from 0-5V) or (b) a PWM signal (from 0-100% duty cycle). Those signals would be used to control the motors through two transistors.
The closest thing I've got so far was recommended by a colleague - a paired remote control and receiver module:
However, that receiver outputs a PWM signal intended for servo control. My understanding of servo PWM signals is that they don't actually swing fully from 0-100% duty cycle, so that wouldn't necessarily work (i.e. if it only drops to 25% duty cycle, the robot would never actually come to a full stop).
Any suggestions for a simple, off-the-shelf solution would be appreciated. I realize there are probably more complicated ways to do this (rip apart an old RC car and steal the circuitry, use an Arduino, etc), but this is for middle-school kids in an afterschool setting, so I need to minimize cost and complexity.