Thread: DIY Steel Plate Impact Detection

For a month or two I have been tinkering with this steel plate impact detection idea for when you go practising target shooting on your own. I found it sometimes difficult to hear a hit (earplugs) and to see the hit (recoil or dare I admit it - old age). I got it working and today I took it to a dog-walk park with my son and tested it all the way to 350m.

Here is a video of it working in my workshop: https://youtu.be/7acWxYwWrTg

50m test: https://youtu.be/jYXJJbm0JaI

100m test: https://youtu.be/ID9QplH6RR8

200m test: https://youtu.be/JgVao70CrxY

350m test: https://youtu.be/f0KK7jSD3as

I tend to over-think/over-engineer things, so what sort of range would one need to make it work at to be really useful - will 2 km be enough?

Any all ideas and feedback appreciated.