Variant HOVERCAR

Overview

Schematic

Transmitter

Components:

• Hoverboard

• Spare Mainboard Kit: https://s.click.aliexpress.com/e/_dUoKbLT

• Kettler Kettcar Daytona Air: https://bit.ly/2JKZMdp
  Other models from here can also fit: https://intl.toys.kettler.net/en/produkte/katalog/n/0/kettcar-1/0/0.html

• ST Link V2 Programmer: https://www.banggood.com/custlink/3KKmMaNnvR

• 2 x Pedals: https://www.banggood.com/custlink/mmG32e8i46
  https://www.banggood.com/custlink/DKK326ISBM
  or
  https://bit.ly/34iTZoL
  https://www.banggood.com/custlink/vGGmMa4kjb
  https://www.banggood.com/custlink/mKDDka4kjf
  

• Front LEDs: https://www.banggood.com/custlink/G3mKMo0qBd
  https://www.banggood.com/custlink/3KKmqa0qec

• Other possible front LEDs: https://www.banggood.com/custlink/KmKGzoB2BP
  https://www.banggood.com/custlink/KKKGzOezBi

• Wires: https://www.banggood.com/custlink/vD3Dqo6wtz

• Connectors: https://www.banggood.com/custlink/vDKDqLe2gU
  https://www.banggood.com/custlink/Dvm32agzB7

• M5 Bolts and Nuts: https://www.banggood.com/custlink/Kvvm2AIwdp
  https://www.banggood.com/custlink/mDvmza4fPF

• Plywood: can be found in the local hardware stores.

Optional

• DC-DC converter LM2596HV: https://s.click.aliexpress.com/e/_ATlz43

• Servo min. 25kg: https://www.banggood.com/custlink/vvDdP7tGZ2

• RC transmitter
  Flysky i6S: https://www.banggood.com/custlink/3KvdPnfDPc
  Flysky i6X: https://www.banggood.com/custlink/KmDy5swKPD

• RC receiver:
  Flysky FS-iA6B: https://www.banggood.com/custlink/KD3RFswKcT

🎛️ Calibration:

Proceed with calibration for better control.
With this variant, the auto-calibration is expecting 2 normal pots, and will reject the calibration if an input is missing or is of incorrect type (e.g. mid-resting pot).
You can change the type of input1(brake) to 0 to disable it if you have a mechanical brake and don't need this input. But you won't be able to use it to reverse anymore.

🚀 Features:

Feature	Mode	How to use it
Reverse	All	Double-pressing brake at standstill will activate reverse
Switch Control Mode	All	Pressing the left optical sensor on the sideboard will switch the control mode (Voltage, Speed, Torque)
Field Weakening	All	Pressing the right optical sensor on the sideboard turns Field Weakening ON/OFF
Cruise Control	All	If CRUISE_CONTROL_SUPPORT parameter is enabled, pressing the right optical sensor on the sideboard will turn Cruise Control ON/OFF instead of field weakening If you are not using the sideboard, and SUPPORT_BUTTONS and SUPPORT_BUTTONS_LEFT parameters are enabled, pressing a button connected between GND and blue wire on the left sensor board cable will turn Cruise Control ON/OFF When turning Cruise Control ON, firmware will hold current measured speed. Using Cruise Control at at standstill(0 speed) will lock the wheels.Braking will disable Cruise Control
Standstill hold	VOLTAGE TORQUE	If STANDSTILL_HOLD_ENABLE parameter is enabled, motors will hold the position when standtill is reached
Electric Brake	TORQUE	If ELECTRIC_BRAKE_ENABLE parameter is enabled, it will replace "freewheel" with a constant braking when the input torque(throttle) request is 0 Parameter ELECTRIC_BRAKE_MAX can be used to set the Maximum electric brake to be applied when input torque request is 0 (pedal fully released) Parameter ELECTRIC_BRAKE_THRES is the threshold below at which the electric brake starts engaging

🧰 Troubleshooting:

• The wheels oscillate when braking: this is normal behavior when there is no load, it won't happen with the wheels on the ground.
  
• If when pressing the brake wheels accelerate, your board probably as a different mapping for hall sensors, firmware measures a speed with opposite sign
• If wheels are not spinning or you get 2 beeps, make sure you have done proper calibration.