From c94d234a8b1ee2b75a84a5e83832e7bee2e6c7e3 Mon Sep 17 00:00:00 2001 From: Candas1 Date: Mon, 2 May 2022 08:52:05 +0200 Subject: [PATCH] Updated Variant PPM (markdown) --- Variant-PPM.md | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/Variant-PPM.md b/Variant-PPM.md index ffc12df..34e8821 100644 --- a/Variant-PPM.md +++ b/Variant-PPM.md @@ -11,7 +11,11 @@ PPM_NUM_CHANNELS is the number of channels for PPM and is 6 by default. As an ex * 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 PPM port of your receiver 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 -* PPM 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 PPM 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: * Enable PPM @@ -28,4 +32,6 @@ If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hac * Make sure you use the PPM port on your receiver * Make sure you are using the sensor cable(left=CONTROL_PPM_LEFT or right=CONTROL_PPM_RIGHT) selected in config.h * On some boards the wire colors might differ, try the blue wire -* 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 \ No newline at end of file +* 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 + +If you get unwanted movements, check the wiring section. \ No newline at end of file