Mobile robot turned on by sound and directionally controlled by an external light source

Luis G. Lafaurie (Universidad Nacional de Colombia Sede Medellín)
Fredy E. Hoyos (Universidad Nacional de Colombia Sede Medellín)
Jhon E. Candelo-Becerra (Universidad Nacional de Colombia Sede Medellín)

International Journal of Electrical and Computer Engineering
Vol 9, No 4: August 2019

This paper presents theoretical, numerical, and experimental tests of a mobile robot, which starts on the emission of a strong sound, like an applause, and the direction and speed of the vehicle is controlled by an external pulsed light source (PWM signal). The simulation is performed in MATLAB-Simulink; electrical circuits and the experiment are shown in detail. The results show that the vehicle speed can be controlled with a PWM signal from an external light falling on the LDR sensors. Besides, the circuit was designed to consume less than 1 ampere with the four motors moving at full speed, which can easily be powered by lithium battery.