 // without stopping everything for a delay.
 #include "SimpleTimer.h"
 #include <Servo.h>
-//#include "ServoTimer2.h"
 #include "Sound.h"
 
 

int whiskers_timer = 0; // Stores the timer used for the whiskers.

// Battery configuration
//const byte battery_led = 5;
unsigned long battery_delay = 15000; // Number of milliseconds to wait before next battery reading

// Sound configuration

 Two motors attached to the motor shield.
 speaker/piezo for sound
 
 PIN ALLOCATION:
 
 13 - Motor B direction
 12 - Motor A direction
 11 - (blocked by shield)
 10 - Infrared remote receiver
 9  - Battery LED 1 (cut brake connect on bottom of the shield)
 8  - Battery LED 2 (cut brake connect on bottom of the shield)
 7  - Ping trigger
 6  - Motor B pwm
 5  - Motor A pwm
 4  - Ping echo
 3  - (blocked by shield)
 2  - Sound
 1  - not connected (Serial write)
 0  - not connected (Serial read)
 
 A0 - Motor current sensor (not used)
 A1 - Motor current sensor (not used)
 A2 - Battery LED 3
 A3 - unused
 A4 - Thumbstick vertical
 A5 - Thumbstick horizontal
 
 
 ABOUT THE TIMERS:
 
 Arduino Uno has three timers; timer 0, timer 1, timer 2
 Timers can be used without their output going to the pins, the PWM pins.

