PWM DC Motor Speed Controller Documentation

Input Signal

Digital (TTL or CMOS compatible)

Input Voltage

3.3V to 5V (dependent on specific model)

Output Voltage

Same as input voltage

Output Current

Up to 2A (dependent on specific model)

PWM Frequency

1-20 kHz (dependent on specific model)

Duty Cycle

0-100%

Operating Temperature

-20C to 70C

Dimensions

Varies depending on specific model (e.g., 15mm x 20mm x 5mm)

Applications

The PWM DC Motor Speed Controller is ideal for use in a wide range of applications, including

Robotics and autonomous systems

Industrial automation and control systems

IoT projects and smart home devices

Automotive systems and accessories

Medical devices and equipment

Aerospace and defense systems

Conclusion

The PWM DC Motor Speed Controller is a versatile and reliable component for regulating the speed of DC motors in various applications. Its compact design, adjustable speed range, and built-in protection features make it an ideal choice for designers and engineers requiring precise motor speed control.

Pin Configuration

PWM DC Motor Speed Controller Documentation
Pinout Explanation
The PWM DC Motor Speed Controller has the following pins:
1. VCC (Power Supply Voltage)
--------------------------------
Function: Power supply voltage input for the controller
Voltage Range: Typically 5V to 35V DC (dependent on the specific module)
Connection: Connect to a stable DC power supply source
2. GND (Ground)
-----------------
Function: Ground connection for the controller
Connection: Connect to the negative terminal of the power supply source or a common ground point
3. IN1 (Input 1)
-------------------
Function: Digital input for enabling/disabling the motor
Logic Level: Active high ( HIGH = Enable, LOW = Disable)
Connection: Connect to a digital output pin of a microcontroller (e.g., Arduino or Raspberry Pi)
4. IN2 (Input 2)
-------------------
Function: Digital input for direction control of the motor
Logic Level: Active high ( HIGH = Forward, LOW = Reverse)
Connection: Connect to a digital output pin of a microcontroller (e.g., Arduino or Raspberry Pi)
5. PWM (Pulse Width Modulation)
---------------------------------
Function: Analog input for speed control of the motor
Signal: PWM signal with a frequency typically between 100 Hz to 25 kHz
Connection: Connect to a PWM output pin of a microcontroller (e.g., Arduino or Raspberry Pi)
6. OUT+ (Motor Output Positive)
---------------------------------
Function: Output to the motor's positive terminal
Connection: Connect to the positive terminal of the DC motor
7. OUT- (Motor Output Negative)
---------------------------------
Function: Output to the motor's negative terminal
Connection: Connect to the negative terminal of the DC motor
Connection Structure:
Here's a typical connection structure:
Power Supply:
+ VCC to a stable 5V-35V DC power supply source
+ GND to the negative terminal of the power supply source or a common ground point
Microcontroller:
+ IN1 to a digital output pin (e.g., Arduino's D2)
+ IN2 to a digital output pin (e.g., Arduino's D3)
+ PWM to a PWM output pin (e.g., Arduino's D9)
DC Motor:
+ OUT+ to the positive terminal of the DC motor
+ OUT- to the negative terminal of the DC motor
Note: The specific connections may vary depending on the microcontroller board and DC motor used. Ensure proper polarity and voltage ratings are observed to avoid damage to the components.
Remember to consult the datasheet of the specific PWM DC Motor Speed Controller module you are using for specific details on pinout, voltage ratings, and any additional features or requirements.

Code Examples

PWM DC Motor Speed Controller

Overview

The PWM DC Motor Speed Controller is a versatile component designed to control the speed of DC motors using Pulse Width Modulation (PWM) techniques. This component is ideal for applications requiring precise motor speed control, such as robotics, drones, and automation systems.

Technical Specifications

Input Voltage: 5V to 24V DC
 Output Current: Up to 2A continuous, 5A peak
 PWM Frequency: 20Hz to 20kHz
 Duty Cycle Resolution: 8-bit (256 steps)

Pinout

VCC: Power supply input (5V to 24V DC)
 GND: Ground connection
 IN1: PWM input signal
 OUT1: Motor output (positive)
 OUT2: Motor output (negative)

Code Examples

### Example 1: Simple Motor Speed Control using Arduino

In this example, we'll demonstrate how to control the speed of a DC motor using an Arduino board.
```c
const int pwmPin = 9;  // PWM output pin on Arduino
const int motorDirectionPin = 2;  // Motor direction control pin
const int motorSpeedPin = 3;  // Motor speed control pin (PWM DC Motor Speed Controller)

void setup() {
  pinMode(pwmPin, OUTPUT);
  pinMode(motorDirectionPin, OUTPUT);
  pinMode(motorSpeedPin, OUTPUT);
}

void loop() {
  // Set motor direction
  digitalWrite(motorDirectionPin, HIGH);

// Set motor speed (0-255)
  int motorSpeed = 128;  // 50% duty cycle (medium speed)
  analogWrite(pwmPin, motorSpeed);

delay(1000);  // Run motor at medium speed for 1 second

// Increase motor speed
  motorSpeed = 255;  // 100% duty cycle (maximum speed)
  analogWrite(pwmPin, motorSpeed);

delay(1000);  // Run motor at maximum speed for 1 second
}
```
### Example 2: Motor Speed Control with Raspberry Pi (Python)

In this example, we'll demonstrate how to control the speed of a DC motor using a Raspberry Pi and Python.
```python
import RPi.GPIO as GPIO
import time

# Set up GPIO mode
GPIO.setmode(GPIO.BCM)

# Define PWM output pin
pwm_pin = 18

# Define motor direction control pin
motor_direction_pin = 23

# Set up PWM output pin as output
GPIO.setup(pwm_pin, GPIO.OUT)

# Set up motor direction control pin as output
GPIO.setup(motor_direction_pin, GPIO.OUT)

# Create a PWM object with a frequency of 50Hz
pwm = GPIO.PWM(pwm_pin, 50)

try:
    while True:
        # Set motor direction
        GPIO.output(motor_direction_pin, GPIO.HIGH)

# Set motor speed (0-100)
        motor_speed = 50  # 50% duty cycle (medium speed)
        pwm.start(motor_speed)

time.sleep(1)  # Run motor at medium speed for 1 second

# Increase motor speed
        motor_speed = 100  # 100% duty cycle (maximum speed)
        pwm.ChangeDutyCycle(motor_speed)

time.sleep(1)  # Run motor at maximum speed for 1 second

except KeyboardInterrupt:
    # Clean up GPIO resources
    pwm.stop()
    GPIO.cleanup()
```
These code examples demonstrate how to use the PWM DC Motor Speed Controller with microcontrollers and single-board computers. You can adjust the duty cycle and frequency to achieve the desired motor speed and performance in your specific application.