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2.a. Orangutan LV-168 Pin Mappings

Pin Assignment Table Sorted by Function

Function	Arduino Pin	mega168 Pin
digital I/Os (x8)	digital pins 0 and 1 analog inputs 0 – 5	PD0, PD1, PC0 – PC5
analog inputs (x8)	analog inputs 0 – 7	PC0 – PC5, ADC6, ADC7
motor 1 control (A and B)	digital pins 5 and 6	PD5 and PD6
motor 2 control (A and B)	digital pins 3 and 11	PD3 and PB3
red user LED	digital pin 1	PD1
green user LED	digital pin 7	PD7
user pushbuttons (x3)	digital inputs 9, 12, and 13	PB1, PB4, and PB5
buzzer	digital pin 10	PB2
LCD control (RS, R/W, E)	digital pins 2, 8, and 4	PD2, PB0, and PD4
LCD data (4-bit: DB4 – DB7)	digital pins 9, 12, 13, and 7	PB1, PB4, PB5, and PD7
user trimmer potentiometer	analog input 7 (through jumper)	ADC7
temperature sensor	analog input 6 (through SMT jumper)	ADC6
ICSP programming lines (x3)	digital pins 11, 12, and 13	PB3, PB4, PB5
reset pushbutton	reset	PC6
UART (RX and TX)	digital pins 0 and 1	PD0 and PD1
I2C/TWI (SDA and SCL)	analog inputs 4 and 5	PC4 and PC5
SPI	inaccessable to user

Pin Assignment Table Sorted by Pin

Arduino Pin	Orangutan Function	Notes/Alternate Functions
digital pin 0	digital I/O	USART input pin (RXD)
digital pin 1	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
analog input 0	analog input and digital I/O	ADC input channel 0 (ADC0)
analog input 1	analog input and digital I/O	ADC input channel 1 (ADC1)
analog input 2	analog input and digital I/O	ADC input channel 2 (ADC2)
analog input 3	analog input and digital I/O	ADC input channel 3 (ADC3)
analog input 4	analog input and digital I/O	ADC input channel 4 (ADC4) I2C/TWI input/output data line (SDA)
analog input 5	analog input and digital I/O	ADC input channel 5 (ADC5) I2C/TWI clock line (SCL)
analog input 6	dedicated analog input	SMT-jumpered to temperature sensor ADC input channel 6 (ADC6)
analog input 7	dedicated analog input	jumpered to user trimmer potentiometer ADC input channel 7 (ADC7)
reset	reset pushbutton	internally pulled high; active low digital I/O disabled by default