Updated Variant ADC (markdown)

Variant-ADC.md

@@ -1,20 +1,20 @@
 This variant can be used with analog inputs like potentiometers, joysticks or throttle/brake handles, even if using hall sensors.
 [Here](https://www.youtube.com/watch?v=q451WdEPkjo) is a video walking you through how to setup the firmare to use it with a joystick.
 
-## Configuration/Parameters
+## :gear: Configuration/Parameters
 * ADC_ALTERNATE_CONNECT : to swap the inputs, in case you cannot do it physically
 * ADC_PROTECT_THRESH : to adjust the threshold below/above the MIN/MAX ADC values that will trigger ADC protection
 * ADC_PROTECT_TIMEOUT : number of wrong / missing input commands before safety state is taken
 
-## Wiring:
+## :electric_plug: Wiring:
 * Connect the potentiometer/hall sensor VCC to 3.3v from programming port or from a voltage regulator, ⚠️ Red wire from sensor cable delivers 15v !!!
 * Connect the output of the potentiometer/hall sensor to the blue wire (ADC1) for steering and green wire (ADC2) for speed on left sensor board cable
 * Connect the potentiometer/hall sensor to ground, ⚠️ On some boards, the black wire is 15v !!! Check with a multi-meter to make sure 15V and ground are not swapped
 * 100k Pull down resistors connected to ground are recommended to prevent issues when inputs are floating (wire is cut or disconnected) triggering ADC protection
 * If you don’t need steering, set input1_type to 0 in order to disable the input or go through the auto-calibration procedure
 
-## Calibration:
+## :control_knobs: Calibration:
 Proceed with [calibration](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Input-Calibration) for better control and proper ADC protection.
 
-## Troubleshooting:
+## :toolbox: Troubleshooting:
 If wheels are not spinning or the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics), make sure you have done proper calibration.