Updated Variant PPM (markdown)

Variant-PPM.md

@@ -1,13 +1,13 @@
 This variant can be used with PPM-SUM RC Receivers.<br>
 As opposed to PWM, it will send all channels on a single wire one after the other.<br>
 
-## Configuration/Parameters
+## :gear: Configuration/Parameters
 CONTROL_PPM_RIGHT is for the right sensor cable and is set by default to limit the noise as this cable is shorter.<br>
 You can use CONTROL_PPM_LEFT instead if you need to use the left sensor cable.<br>
 DEBUG_SERIAL will be automatically enabled on the opposite cable.<br>
 PPM_NUM_CHANNELS is the number of channels for PPM and is 6 by default. As an example Flysky fs-i6ab receiver is sending 8 channels even when used with a 6 channel transmitter<br>
 
-## Wiring:
+## :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 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
@@ -17,10 +17,10 @@ PPM_NUM_CHANNELS is the number of channels for PPM and is 6 by default. As an ex
 * Enable PPM 
 * Assign desired joystick to channel 1(steering) and channel 2(throttle)
 
-## Calibration:
+## :control_knobs: Calibration:
 Proceed with [calibration](https://github.com/EFeru/hoverboard-firmware-hack-FOC/wiki/Input-Calibration) for better control.  
 
-## Troubleshooting:
+## :toolbox: Troubleshooting:
 
 If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics)
 * Check the number of channels, even if you transmitter only handles 6 channels, you receiver might transmit more channels