John Dingley's Self-balancing one wheeled vehicle

Owner	John Dingley
Owner's Other EV	Gyrosurfer
Location	Swansea, Wales United Kingdom ^map
Web	WebPage
Vehicle	2008 Self-balancing one wheeled vehicle Balances using gyroscope, accelerometer and small computer (AVR microcontroller) updating balance position about 100 times per second. Built in a sort of inadvertent "steampunk" Wallace and Gromit construction style!
Motor	Brushless DC 420W motor. Possibly from golf cart originally.
Drivetrain	Chain and sprockets.
Controller	OSMC Open source controller for large combat robots. From USA.
Batteries	2, 12.00 Volt, Lead-Acid, Gel
System Voltage	24 Volts
Charger	Small 12V charger
Heater	None
Instrumentation	Low battery LED warning. Loud buzzer indicates >75% duty cycle being sent to motor (you always need some power in reserve to stop you falling off forwards).
Top Speed	12 MPH (19 KPH) Possible to go faster but would be very dangerous to user if it suddenly stopped at greater than 12mph (unable to jump off at a run).
Acceleration	Not sure. Limited by courage of user rather than available power.
Range	Runs for about 30-40min. Very little power consumed when just balancing on level surface.
Seating Capacity	1 standing!
Tires	Big go-kart rear tire (*1)
Conversion Time	Way too long. Mainly software balancing issues.
Conversion Cost	About $600 spread over 3 months
Additional Features	Bracket for optional extra features to be clamped into place such as headlamp, beer can holder etc.

Self-balancing one wheeled vehicle“The no-snowboard”