![](https://i0.wp.com/www.automaticprojects.com/wp-content/uploads/2023/10/IMG_7270.jpeg?resize=900%2C675&ssl=1)
Eight years after putting together Solarbotics’ Marble Machine Kit, I built their GraviTrack. I also converted my solar-powered marble machine to also run on batteries, so you can see them both running below.
Eight years after putting together Solarbotics’ Marble Machine Kit, I built their GraviTrack. I also converted my solar-powered marble machine to also run on batteries, so you can see them both running below.