The schematic diagram is mainly shown for several modules: main control, boost/step-up convertor, power selector, USB interface, motor driver, LED indicator, signal collection and OLED display.
6.2 Main Control
Pin A0, A1, A2, A3, &A7: Connect the infrared sensor module. Apply PID algorithm to achieve the line following function of the robot by distinguishing the black and white surfaces.
Pin SCL & SDA: Simulates the intensity of black lines by the sensor and display it on the OLED screen, thus enabling debugging with the OLED screen.
Pin D4, D7, D5, & D6: Pin D4 and D5 for the control of the left motor’s direction and speed, when Pin D7 and D6 for the motor on the right.
Pin A6: Read its AD value so as to tell the battery power in a real-time manner.
Pin D10: Read the high and low level of the pin to judge whether the button has been pressed or not, so as to control the start of the robot.
These are the major control sections of the RollbotMicro. You may check the circuit diagrams below by module names in different colors.
6.3 USB Interface Module
6.4 LED Display Module
6.5 OLED Display Module
For more information about the circuit diagram of the rest modules, please refer to the WIKI page on our official websitewww.sunfounder.com