Variant SKATEBOARD - EFeru/hoverboard-firmware-hack-FOC GitHub Wiki

This variant can be used with Pulse Width Modulation remotes for Skateboards/Longboards. Those remotes use a single PWM Channel for Throttle and Brake. When the remote is at middle/resting position, the motors are freewheeling (Torque Mode).

:gear: Configuration/Parameters

Voltage Control Mode is used by default. CONTROL_PWM_RIGHT is for the right sensor cable and is set by default to limit the noise as this cable is shorter. You can use CONTROL_PWM_LEFT instead if you need to use the left sensor cable. DEBUG_SERIAL will be automatically enabled on the opposite cable.

Please also check the parameters that are common to all the variants.

:electric_plug: Wiring:

• Connect your receiver VCC to 3.3v from programming port, 5v from hall sensor cable, or a voltage regulator, ⚠️ Red wire from sensor cable delivers 15v !!!
• Connect the receiver signal to green wire on right sensor cable(shorter)
• Connect the receiver to ground, ⚠️ On some boards, the black wire is 15v !!! Check with a multi-meter to make sure 15V and ground are not swapped

As the speed/load increases, there can be a lot of noise in the PWM signal, triggering unwanted movements :

• Keep cables short, use shielded cable, use ferrites, stabilize voltage
• You can scratch the pcb and solder 100nf capacitors to ground, that will act as a RC filter and reduce the signal noise

:control_knobs: Calibration:

Proceed with calibration for better control. This variant is expecting only one mid-resting input, calibration will be rejected otherwise.

:toolbox: Troubleshooting:

If the board is beeping

• Make sure you are using the sensor cable(left=CONTROL_PWM_LEFT or right=CONTROL_PWM_RIGHT) selected in config.h
• You might have a defective input, because of a fried resistor or MCU pin (e.g. issue), you can configure the firmware to work on the other cable

If you get unwanted movements, check the wiring section.