click on the images to enlarge POPBOT-XT Features: • ATmel ATmega 32 U 4 MCU, 10 -bit A/D converter with 12 -channel, 32 KB of flash program memory, 1 KB of EEPROM, 2. 5 KB of RAM and 16 MHz clock frequency. • 25 -I/O port and assign to 12 of 3 -pin JST connectors for interfacing with sensors and peripherals • Screw terminal block for battery connections. It supports +4. 8 to +12 Vdc and has an on-board power switch. • +5 Vdc switching regulator power supply circuit. Its regulates the supply voltage for microcontroller devices and all sensor ports. • 128 x 160 pixels color graphic LCD stack board. includes KNOB, OK and RESET button. This display board onlu supports line-art graphic, vector graphic, color background and text (no support the image file). • 8 -Universal port support Analog input functions and Digital input/output function; A 0 to A 7 (18 to 23, 4 and 6 digital pin) • I 2 C bus port; SDA (2) and SCL (3) • UART port; Rx. D (0) and Tx. D (1) • 2 -ch. DC motor driver with indicators. Supports motor voltage of 2. 5 to 13. 5 Vdc. • 3 -Servo motor output; connect with the digital port 30 (SV 1), 12 (SV 2) and 13 (SV 3). • Piezo speaker connections. It is connected with digital port 11. • LED power and Low battery indicator • Direct USB port connection for communication and upload the running code • ISP pad for upgrading and firmware recovery by using the external In-System Programming (AVR-ISP mark II from Atmel is recommended)