Rival Blaster

This is the first version of my blaster compatible with the Nerf Rival rounds.
The new version should have less parts, be cheaper and be quiter without the EDF.

2 x Racerstar BR2212 1800KV 2-4S Brushless Motor
1 x 35mm brushless EDF
3 x ESC
1 x N20 Micro Speed motor
1 x 4S LiPo
1 x Arduino Pro Mini
1 x h-bridge for controlling the feeder (not necessary)

https://youtu.be/qruwTxABoGA

Arduino code (not tested) :
Requieres the servo.h lib

// motors :
Servo motorTop;
Servo motorDown;
Servo motorEdf;
int motorFeedHBridgeEn = 4; // "H-Bridge Enable" use the h-bridge to control the feeding motor
int motorFeedHBridgeDirection = 2; // "H-Bridge input" use the h-bridge to control the feeding motor

// potentiometers :
int wheelSpeed = 0;
int wheelSpeedValue;
int hopUp = 1;
int hopUpValue;
int edfSpeed = 2;
int edfSpeedValue;
int feed = 3;
int feedValue;

// sensors :
int counter = 5; // count the fired shots

// buttons :
int trigger = 6; // control the