David Stock for New Scientist
WHAT did your motion-sensitive wildlife camera spot last week? Perhaps you saw beautiful birds, or hedgehogs snuffling around at twilight. Or perhaps you snapped a photo of the neighbourhood cats digging up your plants, or foxes menacing your bins.
If it was either of this second pair, this week’s project will help protect your petunias and keep a lid on your garbage by surprising any creatures that stray where they aren’t welcome.
To detect the intruders, we are going to make a simple pressure plate switch that will trigger when stepped on. Take the plastic folder and cut…
