Another view
OwnerJohn Dingley
Owner's Other EVSelf-balancing one wheeled vehicle
LocationSwansea, Wales United Kingdom map
Self-balancing electric skateboard with 2 wheels so can turn even when stationary. Developed from an earlier model also on this website.
MotorMY Permanent Magnet DC
Electric scooter motor x 2
Drivetrain2 electric motors and chains
Controller Sabertooth
Robot controller
Batteries24.00 Volt, Lithium-Polymer
24V 12Ah LiFePO4 Chinese e-bike battery imported via Hong-Kong supplier
System Voltage24 Volts
3 Amp Chinese charger came with battery pack.
InstrumentationBattery level LED indicator
Top Speed12 MPH (19 KPH)
Theoretical top speed. It requires some courage when the wheels are both in the center to run this machine at top speed!
Range10 Miles (16 Kilometers)
Has not been tested in real life but theoretical range is >10 miles.
EV Miles
Current:1 Miles (1 Kilometers)
    As of 4/5/2009
Seating Capacity1 (standing)
Curb Weight30 Pounds (13 Kilograms)
My original monowheel machine is on this site also. This was very heavy and awkward shape to pick up. This time I have concentrated on a much lighter machine with similar performance.
TiresPolypropylene solid
Conversion TimeWay too much.
Conversion CostAbout $400-500
Additional FeaturesNot many:

Side handle for user to pick it up by.

Hand radio controller - steering is done using radio linked hand controller.

Socket for charger

Dead man switch on board - if you fall off motor cuts out.
Not your mainstream EV but very good fun to develop and ride as it is one of those machines that "shouldn't" work.

Still is a work in progress.

More practical and portable than my original version although not so good on steep inlines as the original.

code by jerry