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

The Matek 12S-PRO BEC is a high-performance battery eliminator circuit (BEC) designed to provide a stable and reliable voltage output for powering servos, flight controllers, and other onboard electronics in multi-rotor and fixed-wing aircraft. It is specifically engineered to handle high-voltage input from batteries, making it an ideal choice for demanding applications in UAVs, drones, and RC aircraft.

• Powering flight controllers, servos, and receivers in drones and RC aircraft.
• Voltage regulation for high-voltage battery systems (up to 12S LiPo).
• Providing stable power to onboard electronics in multi-rotor and fixed-wing platforms.
• Reducing the need for separate power supplies by stepping down high-voltage battery input.

• Input Voltage Range: 9V to 60V (3S to 12S LiPo batteries)
• Output Voltage Options: 5V, 9V, 12V (selectable via solder pads)
• Maximum Output Current: 5A continuous, 6A peak
• Efficiency: Up to 95%
• Dimensions: 21mm x 15mm x 6mm
• Weight: 4g
• Protection Features: Overcurrent protection, thermal shutdown, and short-circuit protection.

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

1. Select the Output Voltage:

   • Locate the solder pads on the BEC labeled "5V," "9V," and "12V."
   • Use a soldering iron to bridge the pads corresponding to the desired output voltage.
   • Ensure only one voltage option is selected at a time.

2. Connect the Input Voltage:

   • Connect the VIN+ pin to the positive terminal of your battery (3S to 12S LiPo).
   • Connect the VIN- pin to the negative terminal of your battery.

3. Connect the Output Voltage:

   • Connect the VOUT+ pin to the positive terminal of the device or electronics you want to power.
   • Connect the VOUT- pin to the ground terminal of the device or electronics.

4. Verify Connections:

   • Double-check all connections to ensure proper polarity and avoid short circuits.
   • Use a multimeter to confirm the output voltage before connecting sensitive electronics.

5. Power On:

   • Turn on the power supply or connect the battery to the BEC.
   • Verify that the output voltage is stable and within the selected range.

• Ensure the input voltage is within the specified range (9V to 60V) to avoid damaging the BEC.
• Do not exceed the maximum continuous output current of 5A to prevent overheating.
• Mount the BEC in a location with adequate airflow to improve heat dissipation.
• Use appropriate wire gauges for input and output connections to handle the current safely.
• If using the BEC with an Arduino UNO or other microcontrollers, ensure the output voltage matches the microcontroller's operating voltage (e.g., 5V for Arduino UNO).

If you are using the Matek 12S-PRO BEC to power an Arduino UNO, follow these steps:

1. Set the output voltage to 5V by bridging the "5V" solder pads.
2. Connect the VOUT+ pin to the Arduino's 5V pin.
3. Connect the VOUT- pin to the Arduino's GND pin.

Here is a simple Arduino code example to test the setup:

// Example code to blink an LED connected to pin 13 on the Arduino UNO
// Ensure the Matek 12S-PRO BEC is providing 5V to the Arduino UNO.

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

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 solder pad selection or poor soldering.
   • Solution: Verify the solder pads are correctly bridged for the desired output voltage. Re-solder if necessary.

2. Overheating:

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

3. Output Voltage Fluctuations:

   • Cause: Input voltage instability or excessive load.
   • Solution: Ensure the input voltage is stable and within the specified range. Reduce the load if necessary.

4. Short Circuit Detected:

   • Cause: Incorrect wiring or a short circuit in the connected load.
   • Solution: Inspect all connections for shorts and correct any wiring errors.

• Q: Can I use the Matek 12S-PRO BEC with a 2S LiPo battery?
  A: No, the minimum input voltage is 9V, which corresponds to a 3S LiPo battery.

• Q: How do I know if the BEC is overheating?
  A: The BEC includes thermal shutdown protection. If it overheats, it will automatically shut down to prevent damage.

• Q: Can I power multiple devices with the BEC?
  A: Yes, as long as the total current draw does not exceed 5A continuous or 6A peak.

• Q: Is the Matek 12S-PRO BEC waterproof?
  A: No, the BEC is not waterproof. Protect it from moisture and water exposure during use.

This concludes the documentation for the Matek 12S-PRO BEC. Follow the guidelines above to ensure safe and efficient operation of this high-performance component.