My son has an electric go kart 24 V with a 10 Amp motor (2 x 12v batteries)
the speed controller appears to have failed - so i have decided to use the arduino to provide motor control
i want to
run the arduino off a 12v battery fit a potentiometer so i can limit the speed fit a new potentiometer to the end of the throttle cable to allow him to drive it measure motor speed to provide soft start at low rpm
i have a couple of questions
- is there anywhere i can get a small linear potentiometer
- is there a relay i can use to switch the 24 V to the motor (using pwm) that the arduino can power with no external power
should i be using a mosfet instead if a relay ?