Hello,
I want to do this circuit, a hall effect sensor will measure will measure the returns of a small tire then arduino take the returns measured per minute and with the speed measured, do some calculations and the result will be the speed of a 12 dc motor. Here i have a guestion. Will arduino have problem if i give it 12 volt to control the motor, or i will give the electricity that motor needs from an other external source directly to motor ?
thank a lot