Unfortunately, I couldn't find any video of the cloudflare pendulums in action, but this other one [1] gives some idea, despite being human powered rather than

Unfortunately, I couldn't find any video of the cloudflare pendulums in action, but this other one [1] gives some idea, despite being human powered rather than battery powered. Btw, I imagine a camera pointed at a busy intersection with lots of pedestrian traffic (e.g. Times Square) to generate much more entropy. [1] https://www.youtube.com/watch?v=J85gpcjvqzs https://www.youtube.com/watch?v=J85gpcjvqzs