Rancang Bangun Sistem Akuisisi Data Kecepatan Sprint Atlet Berbasis Mikrokontroler
Johaidah Mistar
Abstrak
microcontroller-based athlete sprint speed data acquisition system has been designed. There are two components of the infrared sensor that function as start and stop, then the signal is forwarded to the Nodemcu microcontroller to be processed as a time variable in milliseconds. After the data is processed, the signal is sent to the user via the cloud hosting server which can be observed via a smartphone. The testing technique is done by placing sensor A and sensor B 10 meters apart then the athlete sprints through the two sensors 10 times as a substitute for the 100 meter sprint. Fast or slow travel time when recording athletes' sprints can be caused by several factors, namely: (1) the angle formed by the body during the sprint, where the angle of movement from a biomechanical view affects the width of the steps in the range. So that the wider the steps are formed, the farther the distance generated in one step in the sprint movement . (2) data on endurance and stamina of athletes when doing 100 m sprints spontaneously, however, from the graph produced, all athletes do not experience a significant decrease in speed so it can be assumed that the athlete's muscle endurance when doing 100 m sprints is still in the best condition. (3) the speed of sending data from sensors to cloud hosting, this can happen if there is a network or disruption
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