A Design and Construction of Electric Wheelchair for Disabilities with Pulse Width Modulation Speed Control

Abstract

This paper presents a design and construction of electric wheelchair for disabilities with pulse width modulation speed control. The speed can be set at 100% 80% 60% and 40% of full speed and controlled by a microcontroller which is able to move and take the user to another places. It obtains a command from the user via the controlling handle and sends this command pass through a microcontroller. This electric wheelchair use microcontroller PIC16F877 controlled by PICBASICPRO language for controlling the whole system. In the actual test, the microcontroller is able to receive the instruction from the controlling handle for processing and controlling all of the functions, for example, move forward, move backward, stop, turn right, turn left and also run in a soft speed. This electric wheelchair is able to move with 1.59 m/s of full speed and also receives the maximum weight of 120 kilograms. It is safe and very energy saving to user.