Object detecting lawnmower - photo and video

Object detecting lawnmower.

https://s3-us-west-1.amazonaws.com/h..._lawnmower.jpg

5:21 video:
https://www.youtube.com/watch?v=eDZeLPgYBvg


Previously:

https://www.homemadetools.net/forum/...505#post158744
https://www.homemadetools.net/forum/...113#post157487
https://www.homemadetools.net/forum/...293#post154194
https://www.homemadetools.net/forum/...098#post138114
https://www.homemadetools.net/forum/...657#post143508

with the prox range, the device will only sense if the metal object is within 1" (25mm) of the centreline of the mower, but running over a screwdriver in line with the battery pack will remain undetected, and become a missile when struck by the rotating blades.