I made a wagon with an electric motor to carry my things to the park and at music festivals. It has a 1000W brushless DC motor and a drive train for a go cart. It’s controlled by an ESP32 that is attached to a hand throttle on the handle for the wagon. This ESP32 also has a temperature sensor attached to the batteries in the wagon to make sure they don’t overheat. It controls a relay that powers another ESP32 that controls the Neopixels I’ve attached to the wagon using LED channels with a milky white diffuser.

It was a very fun project and I learned a lot about electricity, batteries and the pitfalls of aliexpress.