I’ve always wanted a way to trigger the radar detractors that people use in their cars. I’ve noticed for a while that when a bunch of people suddenly move to the right lane there is usually a cop with a speed gun around, so sending a fake pulse periodically seems a sneaky way to clear the traffic ahead (but would only work when there was something solid to reflect the pulse back, sorry Kansas). I’ve not found anything on Google or Ali Express that looks like it might help me pull this off - nobody wants to build a Rasphberry Pi speed gun it seems.