Arduino MEGA 2560 R3 User Manual

Figure 2: Initial State
4. Start
Figure 3 shows a picture of the start state. After pressing PB0 to start the program, the LED
lights is going to flash. When it flashes three times, then you can start to input the location of the
accident.
Figure 3: Start
5. Input State
Figure 4 shows a picture of Input State, which is a state waiting for the user to input.

Arduino MEGA 2560 R3 Specifications

General

Microcontroller	ATmega2560
Operating Voltage	5V
Input Voltage (recommended)	7-12V
Input Voltage (limit)	6-20V
Digital I/O Pins	54 (of which 15 provide PWM output)
Analog Input Pins	16
DC Current per I/O Pin	20 mA
DC Current for 3.3V Pin	50 mA
Flash Memory	256 KB of which 8 KB used by bootloader
SRAM	8 KB
EEPROM	4 KB
Clock Speed	16 MHz
LED_BUILTIN	13
Length	101.52 mm
Width	53.3 mm
Weight	37 g