MICRO USB connector : for uploading program OR serial port debugging
Power output header : 3.3V OR 5V, voltage level configured by the onboard power configuration switch, used as power output OR common-grounding with other boards
FT232 pins : for burning Bootloader into the microcontroller
DC input : 7V ~ 12V
Reset button
Power indicator
Serial port Rx/Tx indicator
User LED
500mA fast self-recovery fuse
Power configuration : for configuring the operating voltage
Bootloader selection switch
turn ON : the board will reset when power-up OR other USB devices were detected connecting to the PC
turn OFF : the onboard program runs immediately when power-up, and the board will not reset when other USB devices were detected connecting to the PC
What's on the AlphaBot Mainboard
Raspberry Pi interface: for connecting Raspberry Pi
Arduino interface: for connecting Arduino
Motor interface
Ultrasonic module interface
Servo module interface
Obstacle avoidance module interface
Speed measuring interface
Battery holder: supports 18650 batteries
Reserved power input (not soldered): for connecting other external power supply
Arduino expansion header: for connecting Arduino shields
UART interface: for connecting Bluetooth module, to control the robot remotely via Bluetooth
SPI interface: for connecting NRF24L01 wireless module
Line tracking module interface
TLC1543: 10-bit AD acquisition chip, allows the Pi to use analog sensors
LM298P: dual H bridge motor driver chip, up to 2A current
Anti-reverse diode
Power switch
LM2596: 5V regulator
Power indicator
UART switch: turn on to enable serial communication between Raspberry Pi and Arduino
IR receiver: control the robot remotely via infrared
Raspberry Pi/Arduino selection: select the Raspberry Pi or Arduino to control the robot peripherals
