How to Use AC-DC power converter: Examples, Pinouts, and Specs

The AC-DC Power Converter (Manufacturer Part ID: 120V-AC to 5V&12V-DC) is a versatile electronic component designed to convert alternating current (AC) from a standard power outlet into direct current (DC) suitable for powering electronic devices. Manufactured by AliExpress Shop#1103102195 Store, this converter is commonly used in power supplies for a wide range of applications, including embedded systems, IoT devices, and consumer electronics.

• Powering microcontrollers, sensors, and modules in embedded systems
• Supplying DC voltage to IoT devices and smart home appliances
• Providing stable DC power for LED lighting systems
• Charging batteries or powering small DC motors
• General-purpose DC power supply for prototyping and testing circuits

The following table outlines the key technical details of the AC-DC Power Converter:

The AC-DC Power Converter has the following pin configuration:

1. Connect the AC Input:

   • Attach the AC-L pin to the live wire of the AC power source.
   • Attach the AC-N pin to the neutral wire of the AC power source.
   • Ensure proper insulation and secure connections to avoid electrical hazards.

2. Connect the DC Output:

   • Use the +5V pin to power devices requiring 5V DC.
   • Use the +12V pin to power devices requiring 12V DC.
   • Connect the GND pin to the ground of your circuit.

3. Verify Connections:

   • Double-check all connections before powering the circuit.
   • Use a multimeter to confirm the output voltage levels.

4. Power On:

   • Plug the AC input into a power outlet and switch it on.
   • Verify that the connected devices are receiving the correct voltage.

• Safety First: Always handle the AC input with care to avoid electric shock. Use insulated tools and ensure proper grounding.
• Load Limits: Do not exceed the maximum output current (5V: 2A, 12V: 1A) to prevent overheating or damage.
• Ventilation: Ensure adequate airflow around the converter to maintain safe operating temperatures.
• Testing: Use a multimeter to verify the output voltage before connecting sensitive devices.
• Arduino Compatibility: This converter can be used to power an Arduino UNO by connecting the +5V output to the Arduino's 5V pin and GND to the Arduino's GND pin.

// Example code to blink an LED using an Arduino UNO powered by the AC-DC converter

// Pin 13 is connected to the onboard LED
const int ledPin = 13;

void setup() {
  pinMode(ledPin, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED on
  delay(1000);                // Wait for 1 second
  digitalWrite(ledPin, LOW);  // Turn the LED off
  delay(1000);                // Wait for 1 second
}

Note: Ensure the AC-DC converter's 5V output is connected to the Arduino's 5V pin and GND to GND.

1. No Output Voltage:

   • Cause: Incorrect AC input connections or no power supply.
   • Solution: Verify the AC-L and AC-N connections and ensure the power outlet is functional.

2. Overheating:

   • Cause: Exceeding the maximum output current or poor ventilation.
   • Solution: Reduce the load or improve airflow around the converter.

3. Voltage Fluctuations:

   • Cause: Unstable AC input or excessive load.
   • Solution: Use a voltage stabilizer for the AC input or reduce the load.

4. Short Circuit Protection Triggered:

   • Cause: A short circuit in the connected load.
   • Solution: Inspect the connected circuit for shorts and resolve the issue before reconnecting.

Q1: Can this converter be used outdoors?
A1: No, this converter is not waterproof or weatherproof. Use it only in dry, indoor environments.

Q2: Can I use both the 5V and 12V outputs simultaneously?
A2: Yes, but ensure the combined load does not exceed the maximum power output of 20W.

Q3: Is this converter compatible with rechargeable batteries?
A3: Yes, but you must use a proper charging circuit to regulate the charging process.

Q4: What happens if the input voltage exceeds 240V AC?
A4: The converter may get damaged. Always ensure the input voltage is within the specified range (100V - 240V AC).

By following this documentation, you can safely and effectively use the AC-DC Power Converter in your projects.