Mr. K in Kagawa prefecture made a device to detect and display the arrival order of targets using four modified “MK-305B sound sensor kit”. This is a device used in games using a toy gun (airgun).

Four “MK-305B sound sensor kit” were attached to four targets, and it detects the collision sound of each target was adopted. Furthermore, upon receiving a detected signal from the outside, the program of each MK-305 B is modified so as not to detect sound.

When the modified MK-305B detects the sound that the BB bullet hits the target, that MK-305B sends the detected signal to the other MK-305B. At the same time, the MK-305B tunes on the LED lights.

With this device, out of the four people, who gun bullet hits the target can be understood from a distance by LED lighting.

He uses this in shooting games. Thanks to Mr. K who developed a nice device and provided the picture.