User Manual

Arduino Pin Orangutan Function Notes/Alternate Functions

digital pin 0 free digital I/O USART input pin (RXD)

digital pin 1 free digital I/O

connected to red user LED (high turns LED on)

USART output pin (TXD)

digital pin 2 LCD control line RS external interrupt 0 (INT0)

digital pin 3 M2 control line Timer2 PWM output B (OC2B)

digital pin 4 LCD control line E

USART external clock input/output (XCK)

Timer0 external counter (T0)

digital pin 5 M1 control line Timer0 PWM output B (OC0B)

digital pin 6 M1 control line Timer0 PWM output A (OC0A)

digital pin 7 LCD data line DB7 connected to green user LED (high turns LED on)

digital pin 8 LCD control line R/W

Timer1 input capture (ICP1)

divided system clock output (CLK0)

digital pin 9 LCD data line DB4

user pushbutton (pressing pulls pin low)

Timer1 PWM output A (OC1A)

digital pin 10 buzzer Timer1 PWM output B (OC1B)

digital pin 11 M2 control line

Timer2 PWM output A (OC2A)

ISP programming line

digital pin 12 LCD data line DB5

user pushbutton (pressing pulls pin low)

Caution: also an ISP programming line

digital pin 13 LCD data line DB6

user pushbutton (pressing pulls pin low)

Caution: also an ISP programming line

digital pin 14 QTR-RC reflectance sensor