LM2596 DC-DC Step-down Buck Module with Display Documentation

High Efficiency

The LM2596 IC has a high efficiency of up to 92%, making it suitable for applications where power loss is a concern.

Adjustable Output Voltage

The output voltage can be adjusted between 1.25V and 35V using the built-in potentiometer.

Digital Display

The module features a digital display that shows the output voltage in real-time, allowing users to monitor and adjust the voltage output.

Wide Input Voltage Range

The module can accept input voltages between 4V and 40V, making it suitable for a wide range of applications.

Low Dropout Voltage

The LM2596 IC has a low dropout voltage of 1.5V, ensuring that the module can operate efficiently even when the input voltage is close to the output voltage.

Short Circuit Protection

The module has built-in short circuit protection to prevent damage to the component in case of a short circuit.

Compact Size

The module is compact and lightweight, making it easy to integrate into a wide range of applications.

Heat Sink

The module has a built-in heat sink to dissipate heat generated during operation.

Technical Specifications

Input Voltage

4V - 40V

Output Voltage

1.25V - 35V (adjustable)

Output Current

Up to 3A

Efficiency

Up to 92%

Dropout Voltage

1.5V

Operating Temperature

-40C to 85C

Dimensions

48mm x 25mm x 15mm (L x W x H)

Applications

The LM2596 DC-DC Step-down Buck Module with Display is suitable for a wide range of applications, including

Power supplies for electronic projects

Voltage regulators for battery-powered devices

Adjustable power supplies for laboratory use

Power converters for automotive and industrial applications

Conclusion

The LM2596 DC-DC Step-down Buck Module with Display is a versatile and efficient voltage regulator module that is ideal for a wide range of applications. Its adjustable output voltage, high efficiency, and compact size make it a popular choice among electronics enthusiasts and professionals alike.

Pin Configuration

LM2596 DC-DC Step-down Buck Module with Display: Pinout Explanation
The LM2596 DC-DC Step-down Buck Module with Display is a versatile and efficient power management module used to step down higher voltage inputs to lower voltage outputs. This documentation provides a comprehensive explanation of each pin on the module, along with guidance on how to connect them properly.
Pinout Structure:
The LM2596 module has a total of 6 pins, labeled as follows:
1. Vin (Input Voltage)
Function: Input voltage pin, connects to the higher voltage power source (e.g., a battery or a wall adapter).
Voltage Range: Typically operates from 4V to 40V, but check the specific module's datasheet for exact voltage limits.
Connection: Connect the Vin pin to the positive terminal of the power source.
2. Vout (Output Voltage)
Function: Output voltage pin, provides the regulated lower voltage output.
Voltage Range: Typically operates from 1.25V to 37V, but check the specific module's datasheet for exact voltage limits.
Connection: Connect the Vout pin to the positive terminal of the load device (e.g., a microcontroller, sensor, or other components).
3. GND (Ground)
Function: Ground pin, connects to the common ground of the circuit.
Connection: Connect the GND pin to the negative terminal of the power source and the ground of the load device.
4. ADJ (Adjustment Pin)
Function: Adjusts the output voltage by connecting a resistive divider network.
Connection: Connect a resistive divider network between the Vout pin and the ADJ pin to adjust the output voltage. Consult the datasheet for specific resistor values and calculation methods.
5. EN (Enable Pin)
Function: Enables or disables the module's operation.
Logic: Active-high logic, meaning the module is enabled when the EN pin is connected to a logic high level (typically Vin or Vout) and disabled when connected to a logic low level (typically GND).
Connection: Connect the EN pin to Vin or Vout to enable the module, or connect to GND to disable the module.
6. DISP (Display Pin)
Function: Connects to a display device, such as an LCD or OLED display, to monitor the output voltage and other module parameters.
Connection: Consult the display device's datasheet for specific connection requirements.
Additional Notes:
Ensure proper heat dissipation for the module, especially during high-power operations.
Use proper decoupling capacitors at the input and output pins to minimize noise and ripple.
Consult the module's datasheet for specific operating conditions, such as temperature range, maximum output current, and input voltage requirements.
By following these pinout explanations and connection guidelines, you can successfully integrate the LM2596 DC-DC Step-down Buck Module with Display into your IoT project or application.

Code Examples

LM2596 DC-DC Step-down Buck Module with Display Documentation

Overview

The LM2596 DC-DC Step-down Buck Module with Display is a compact, high-efficiency voltage regulator module that provides a stable output voltage from a wide input voltage range. It features an onboard LM2596 IC, which is a popular and reliable step-down buck converter, and a built-in display that shows the output voltage. This module is ideal for powering electronic projects that require a regulated voltage supply, such as microcontrollers, sensors, and actuators.

Features

Input voltage range: 4-40V
 Output voltage range: 1.25-37V (adjustable)
 Maximum output current: 3A
 High efficiency: up to 92%
 Built-in display shows output voltage
 Small form factor: 45x25mm

Pinouts

VIN: Input voltage
 VOUT: Output voltage
 ADJ: Adjustable output voltage pin
 GND: Ground
 DISP: Display voltage output ( connects to the built-in display)

Code Examples

### Example 1: Arduino - Adjustable Power Supply

In this example, we will use the LM2596 module as an adjustable power supply for an Arduino project. We will connect the module to an Arduino board and use the ADJ pin to adjust the output voltage using a potentiometer.

```c++
const int potPin = A0;  // Potentiometer pin
const int adjPin = 9;   // ADJ pin of the LM2596 module

void setup() {
  pinMode(adjPin, OUTPUT);
}

void loop() {
  int val = analogRead(potPin);
  int voltage = map(val, 0, 1023, 125, 370); // Map potentiometer value to output voltage (1.25-37V)
  analogWrite(adjPin, voltage);
  delay(10);
}
```

### Example 2: Raspberry Pi - regulated 5V Power Supply

In this example, we will use the LM2596 module as a regulated 5V power supply for a Raspberry Pi project. We will connect the module to a Raspberry Pi board and use the module's built-in display to monitor the output voltage.

```python
import time

# Set the output voltage to 5V
vout = 5.0

# Calculate the ADJ pin voltage (VAdj) using the formula: VAdj = 1.25  (1 + R2/R1)
r1 = 1.2e3  # R1 value in ohms
r2 = 2.4e3  # R2 value in ohms
vadj = 1.25  (1 + r2/r1)

print("Setting output voltage to", vout, "V")
print("ADJ pin voltage:", vadj, "V")

while True:
    # Read the display voltage output (DISP pin)
    disp_voltage = read_disp_voltage()

# Print the output voltage
    print("Output voltage:", disp_voltage, "V")

time.sleep(1)

def read_disp_voltage():
    # Implement the code to read the DISP pin voltage output
    # and return the voltage value
    pass
```

Note: The `read_disp_voltage()` function is not implemented in the example code, as it requires additional circuitry and programming to read the voltage output from the DISP pin.