Accelerometer Based Electric Wheelchair

A wheelchair is a tool to facilitating patients moving from one place to another; it is used in a patient who suffered decreased muscle strength or people with motor system disabilities so that they experience a disruption in balance. The kind of wheelchair that is in demand is the electric wheelchairs. It is preferable because patients can use it independently. This study is on the electrical wheelchair utilizing the output signal from the ADXL335 Accelerometer sensor connected to microcontroller Arduino. When the patient's head moves to one side (nodding, looking up or tilting left and right) the Accelerometer ADXL335 sensor will make a reading process which is then processed in the microcontroller Arduino, then the Arduino will provide voltage to the H-Bridge Relay Driver to drive the DC motor so that the wheelchair can move forward, backward or left and right. An ultrasound safety system is located behind the patient. The order execution test is carried out 25 times and obtained accuracy of 88% advance, right turn 84%, left turn 88%, reverse 92%. In accordance with the accuracy values are obtained that the electric wheelchair based on accelerometer can function properly.