Description: Firstly, we create a catapult using the principle of the lever. Secondly, we designed three ways to build the automatic scoring system. The first method is using the infrared(IR) sensor, IR sensor is a radiation-sensitive optoelectronic component with spectral sensitivity in the infrared wavelength range. Therefore, it is a good motion detector in building catapult while it senses some object hitting the sensor, scoring will be counted. The second method is using the pressure sensor. When the sensor feels pressure, marks will start to count. The third method is creating a closed circuit when the ball has enough power to make two separate tin foil together. A circuit is closed and a signal will send to micro:bit for scoring. School: Ho Shun Primary School (Sponsored by Sik Sik Yuen) (P6)
