This is what led [Dirk] to create human-powered, battery-free laser guns with software to track and display hits. In the image above, red laser hits on the target are detected and displayed on the ...

[Heine Nielsen] is just one such builder, creating a fully-featured laser rifle loaded with features. As far as hardware goes, [Heine]’s laser rifle is packed to the gills. There are two ESP32s ...