13 12 11 10 9 8 7 6 5 4 3 2 5V A0 ANALOG IN AREF SCL SDA GND RESET 3V3 A1 A2 A3 A4 A5 VIN GND IOREF AREF ICSP 0 1 TX RX DIGITAL(PWM ) USB CLIENT USB HOST POWER What will you make?