tictac
Full Member level 5
hi
I want to measure the current of a motor dc that control its speed with pwm.I use below circuit for measuring the current.but I dont know a good value for resistor and capcitor.I take this value that shown in the picture,voltage has changing proper to the current but its change is very low.and after the motor being off,the voltage doesnt return to the first value.please help me
I want to measure the current of a motor dc that control its speed with pwm.I use below circuit for measuring the current.but I dont know a good value for resistor and capcitor.I take this value that shown in the picture,voltage has changing proper to the current but its change is very low.and after the motor being off,the voltage doesnt return to the first value.please help me