Electric Longboard

• Two high power lithium polymer batteries in series
   

• VESC 6 motor controller
   

• Regenerative braking
   

• Custom wireless receiver with custom firmware based on Arduino
   

• Waterproof enclosure with cable glands

The longboard is controlled by a 3D printed, wireless remote with custom firmware.

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• Telemetry data (battery remaining, temperature, RPM, estimated range...) displayed in real-time on the Oled screen.
   

• Regular throttle control and cruise control modes
  
  *This is an adaptation from SolidGeek's project: https://github.com/SolidGeek/nRF24-Esk8-Remote

The brushless DC motor is mounted on a 3D printed PLA mount, attached to the rear truck of the longboard via a clamp printed in PETG.

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An additional support structure, attached to the main mount with two 5mm threaded rods and clamped to the other side of the truck, was later added to improve rigidity.

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A 20 tooth aluminum pulley is attached to the motor shaft. It transmits the power via an HTD 5M belt to a 3D printed 44 tooth pulley fixed to the right wheel.

The board performed flawlessly for the first short tests, but an overheating issue with the motor was apparent when doing longer runs. A cooling fan was then added to the other motor shaft. 

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The maximum speed I was able to reach was around 42 km/h (not shown in this video), although the calculated top speed it can theoretically achieve is 50 km/h.

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After several rides, the hub of the 90mm wheel attached to the motor couldn't handle the repeated torque and broke apart. Wheels with stronger hubs will be required for better longevity.