Shield L293D for NodeMCU

Description

Motor control board L293D for NodeMCU is both a motor shield and an expansion board for WI-Fi modules NodeMCU V2. The L293D chip is used as a driver for the motors., allows you to control two DC motors or one stepper. Maximum continuous output current for each channel - 0.6A, short-term - 1.2 BUT.

Characteristics:

• Chip L293D
• Logic supply voltage 4.5-9V
• Power supply voltage 4.5-36V
• The maximum load current of the stepper motor is 1.2A
• Dimensions 42×58×10 mm

Attention! The shield is only compatible with the version NodeMCU Amica/Doit (v2) and not suitable for NodeMCU LoLin (v3)

General scheme of the board:

Motor connection diagram:

An example sketch for a test run:

#define PIN_D1 5  // gpio5 = D1  PWM_A
#define PIN_D2 4  // gpio4 = D2  PWM_B
#define PIN_D3 0  // gpio0 = D3 DA (A- A+) подключается двигатель 
#define PIN_D4 2  // gpio2 = D4  DB (B- B+) подключается двигатель

void setup() 
   {
    pinMode(PIN_D1, OUTPUT); // инициализируем Pin как выход
    pinMode(PIN_D2, OUTPUT); // инициализируем Pin как выход
    pinMode(PIN_D3, OUTPUT); // инициализируем Pin как выход
    pinMode(PIN_D4, OUTPUT); // инициализируем Pin как выход
   }

void loop()
{
  digitalWrite(PIN_D1, acoustic wave and its return reception on the echo sounder   // PWM_A HIGH
  digitalWrite(PIN_D3, acoustic wave and its return reception on the echo sounder   // DA HIGH
  delay(2000);                  // wait 
  digitalWrite(PIN_D3, to which the head is now turned
 
}
intcm(){
 digitalWrite(trigPin    // DA LOW
  delay(2000);                  // wait
  digitalWrite(PIN_D2, acoustic wave and its return reception on the echo sounder   // PWM_B HIGH, the direction of rotation of the motor is changed on the contacts (B- B+)
  digitalWrite(PIN_D4, acoustic wave and its return reception on the echo sounder   // DB HIGH
  delay(2000);                  // wait 
  digitalWrite(PIN_D4, to which the head is now turned
 
}
intcm(){
 digitalWrite(trigPin    // DB LOW
  delay(2000);                  // wait 
  digitalWrite(PIN_D2, to which the head is now turned
 
}
intcm(){
 digitalWrite(trigPin    // PWM_B LOW

 }

чтение карты if ( ! mfrc522.PICC_ReadCardSerial()) return;