Obstacle Avoidance Car Based on 51 Microcontroller

Obstacle Avoidance Car Based on 51 Microcontroller PART 010151 Minimal System Board

Obstacle Avoidance Car Based on 51 Microcontroller For the 51 microcontroller, simply add a crystal oscillator between XTAL1 and XTAL2, and connect a capacitor to ground on each side of the crystal. The microcontroller has an inverter inside, and with the capacitor and crystal, it can oscillate. Reset is done through a switching power supply, and the microcontroller’s serial port can be connected to a TTL to USB module for programming.

02L298N

Obstacle Avoidance Car Based on 51 Microcontroller The L298N is a dedicated driver integrated circuit that can increase output current and enhance output power. Its output current is 2A, with a maximum current of 4A and a maximum operating voltage of 12V. Its input can be directly connected to the microcontroller, making it easy to control. When driving a DC motor, it can directly control a stepper motor and achieve both forward and reverse rotation. By inputting PWM signals to the ENA and ENB pins, the motor speed can be controlled, and this functionality can be achieved by changing the logic levels at the input.

Infrared Module

Obstacle Avoidance Car Based on 51 Microcontroller This sensor module has strong adaptability to ambient light. It features a pair of infrared emitters and receivers. The emitter emits infrared light at a certain frequency, and when the detection direction encounters an obstacle (reflective surface), the infrared light is reflected back and received by the receiver. After processing through a comparator circuit, the green indicator light will turn on, and the signal output interface will output a digital signal (a low-level signal). The detection distance can be adjusted using a potentiometer, with an effective range of 2~30cm and a working voltage of 3.3V-5V. The detection distance of this sensor can be adjusted via the potentiometer, and it has characteristics such as low interference, easy assembly, and convenient use, making it widely applicable in robot obstacle avoidance, obstacle avoidance cars, assembly line counting, and many other scenarios.