Submitted in partial fulfilment for the requirement of the degree of Bachelor of Engineering in MechanicalIn this project, we have designed and developed transmission system and steering system of a 4 wheel electric mobility scooter for handicapped for indoor and outdoor use. Moreover, it has been specifically designed for a particular patient who is disabled by lower limbs. Therefore we have made it customized that is according to the patient body dimensions, needs or requirements. In this project, the electric scooter circuits were designed and made simple to operate. Other than that, the maintenance of the designed electric scooter in this project is low because the components used are connected to one set of batteries. Proper circuit diagrams and connections were made using various electronic components to solve the issue of operating two controllers through a single throttle and reversing of the motor. In this project the power supply of the motor and the microcontroller is from a single input. Next, a microcontroller is used to control the direction and speed of DC motor. In addition, an interface is used between the user and the controller of electric scooter, toggle switch and limit switch. Finally, the transmission and steering system were assembled on the chassis and testing and tuning were done for successful completion of the project
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