The automotive industries are more specific in automation of the present systems and making them responsive according to the environment. A control circuit for a wind shield wiper motor is described in this paper which will automatically make the response to the presence of moisture droplets on the windshields and vary its speed of motion accordingly. Different kind of sensors, actuators and mechanical designs were tested and finally we came up with the model using pic microcontroller. The cyst of this project is that the rain sensor is used to detect the amount of the rain and give the signal to the controller. The ADC in the controller detects the sensor input and gives the signal to the driver circuit. The motor driver actuates the motor to run at high speed or low speed based on the amount of rain detected. Initialization of the sensor is done when the vehicle is started and generates the power supply needed for the optimum functioning of the sensor. The threshold voltage value for the sensor is defined for the no rain and when it’s raining, and the voltage will always be low. If the voltage reaches the minimum threshold value, the wiper will do its job at the maximum speed.

PIC Microcontroller Motor Sensors Wiper