“I’m developing the Falling-Up Robot (F.U.R.), a very tall balancing inverted pendulum bot, using the Teensy 3.6 microcontroller with the Arduino IDE 1.6.12. I want to learn feedback control systems through practice on an inherently unstable system. It’s 6 feet tall to stand with you and so I can tinker with the main board at desk level. So far, the brain and chassis is in place, and the basic balancing control system is active to keep it from falling over. I used stepper motors to take advantage of high torque at low RPM and zero backlash. This allows very steady stand-still performance. But dealing with the stepper-induced mechanical vibration was an issue. This was mostly solved with analog filters on the IMU and with an Extended Kalman Filter in software.”