diff --git a/Variant-PWM.md b/Variant-PWM.md index 487fa9d..a673a2f 100644 --- a/Variant-PWM.md +++ b/Variant-PWM.md @@ -10,7 +10,11 @@ DEBUG_SERIAL will be automatically enabled on the opposite cable.
* 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 channel 1(steering) of your receiver to blue wire and channel 2(speed) to green wire of the cable selected in config.h * 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 -* PWM is highly prone to noise : keep cables short, use 100nf capacitors, use shielded cable, use ferrites, stabilize voltage + +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 + ## Transmitter configuration: * Assign desired joystick to channel 1(steering) and channel 2(throttle) @@ -23,4 +27,5 @@ If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hac * 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](https://github.com/EFeru/hoverboard-firmware-hack-FOC/issues/244)), you can configure the firmware to work on the other cable -PWM is highly prone to noise : keep cables short, use 100nf capacitors, use shielded cable, use ferrites, stabilize voltage. \ No newline at end of file +If you get unwanted movements, check the wiring section. +