I build this toy top as a exercise to get my feet wet in hardware development. I learned a lot and documented my progress on my website! Read about it there: <a target="_blank" rel="noopener noreferrer" href="https://nathanpetersen.com/2018/05/15/razzler-pov-led-top/">https://nathanpetersen.com/2018/05/15/razzler-pov-led-top/</a>