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 ...

As far as hardware goes, [Heine]’s laser rifle is packed to the gills. There are two ESP32s running the show, along with a meaty 6S lithium battery to ... a HUD on the gun, thanks to a 2.8 ...