How to Use MATEK BEC 12S PRO: Examples, Pinouts, and Specs

The MATEK BEC 12S PRO is a high-efficiency voltage regulator designed to step down voltage from a 12S LiPo battery (up to 50.4V) to a stable output voltage. This component is ideal for use in RC (radio-controlled) applications, such as drones, planes, and other remote-controlled vehicles, where reliable power delivery is critical for onboard electronics. Its compact design and robust performance make it a popular choice for hobbyists and professionals alike.

• Powering flight controllers, receivers, and servos in RC drones and planes.
• Providing stable voltage for FPV (First Person View) cameras and video transmitters.
• Supplying power to microcontrollers and other low-voltage electronic components.
• General-purpose voltage regulation in high-voltage systems.

The MATEK BEC 12S PRO is designed to handle high input voltages and provide a stable output with minimal heat generation. Below are the key technical details:

The MATEK BEC 12S PRO has a simple pinout for easy integration into your circuit. Below is the pin configuration:

1. Connect the Input Voltage:

   • Connect the VIN+ pin to the positive terminal of your 12S LiPo battery.
   • Connect the VIN- pin to the negative terminal of your battery (ground).

2. Select the Output Voltage:

   • Use the onboard jumper to select the desired output voltage (5V, 9V, or 12V).
   • Ensure the selected voltage matches the requirements of your connected devices.

3. Connect the Output Voltage:

   • Connect the VOUT+ pin to the positive input of your load (e.g., flight controller, camera).
   • Connect the VOUT- pin to the ground of your load.

4. Verify Connections:

   • Double-check all connections to ensure proper polarity and secure wiring.
   • Use a multimeter to confirm the output voltage before connecting sensitive devices.

• Heat Dissipation: Although the MATEK BEC 12S PRO is highly efficient, ensure adequate airflow or heat dissipation in high-current applications.
• Voltage Selection: Always verify the output voltage setting before powering your devices to prevent damage.
• Current Limitations: Do not exceed the maximum output current of 3A to avoid overheating or damage to the regulator.
• Polarity Protection: Double-check the polarity of your connections to prevent reverse voltage damage.

The MATEK BEC 12S PRO can be used to power an Arduino UNO in high-voltage systems. Below is an example setup and code:

1. Connect the VIN+ and VIN- pins of the BEC to a 12S LiPo battery.
2. Set the output voltage to 5V using the jumper.
3. Connect the VOUT+ pin to the 5V pin of the Arduino UNO.
4. Connect the VOUT- pin to the GND pin of the Arduino UNO.

// Example code to blink an LED on pin 13 of the Arduino UNO
// Ensure the MATEK BEC 12S PRO is providing 5V to the Arduino UNO

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

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. No Output Voltage:

   • Cause: Incorrect input connections or insufficient input voltage.
   • Solution: Verify the input voltage is within the specified range (up to 50.4V) and check the polarity of the connections.

2. Overheating:

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

3. Incorrect Output Voltage:

   • Cause: Jumper not set correctly or loose connection.
   • Solution: Ensure the jumper is securely placed in the correct position for the desired voltage.

4. Device Not Powering On:

   • Cause: Faulty wiring or damaged component.
   • Solution: Inspect all connections and test the BEC with a multimeter to confirm proper operation.

Q: Can I use the MATEK BEC 12S PRO with a 6S LiPo battery?
A: Yes, the BEC can handle input voltages lower than 12S, such as 6S (22.2V). Ensure the input voltage is within the specified range.

Q: Is the output voltage adjustable beyond the preset options?
A: No, the output voltage is fixed to 5V, 9V, or 12V, depending on the jumper setting.

Q: Can I power multiple devices simultaneously?
A: Yes, as long as the total current draw does not exceed 3A.

Q: Does the BEC have reverse polarity protection?
A: No, the MATEK BEC 12S PRO does not have built-in reverse polarity protection. Always double-check your connections.