How to Use ESC 4in1 25A: Examples, Pinouts, and Specs

The ESC 4in1 25A is an advanced Electronic Speed Controller designed to integrate four individual ESC channels into a single compact unit. This component is capable of handling up to 25A of continuous current per channel, making it ideal for multirotors, drones, and RC vehicles. By combining four ESCs into one, it simplifies wiring, reduces weight, and improves overall efficiency in multi-motor applications.

• Multirotor drones (quadcopters, hexacopters, etc.)
• RC cars, boats, and other vehicles with multiple motors
• Robotics projects requiring precise motor control
• Compact designs where space and weight are critical

The ESC 4in1 25A is built to deliver reliable performance in demanding environments. Below are its key technical details:

The ESC 4in1 25A features a standard pinout for easy integration into your project. Below is the pin configuration:

1. Power Connection: Connect the VBAT+ and GND terminals to the output of your LiPo battery. Ensure the battery voltage is within the supported range (2S-6S).
2. Motor Connection: Connect each motor to the corresponding M1+/M1-, M2+/M2-, M3+/M3-, and M4+/M4- terminals. Ensure proper polarity.
3. Signal Input: Connect the signal wires (S1, S2, S3, S4) to the corresponding outputs of your flight controller or receiver.
4. Telemetry (Optional): If your flight controller supports telemetry, connect the TLM pin to the appropriate input on the controller.
5. Configuration: Use BLHeli_S software to configure the ESC settings, such as motor direction, throttle calibration, and signal protocol (e.g., DShot or PWM).

• Cooling: Ensure adequate airflow over the ESC to prevent overheating during operation.
• Battery Selection: Use a high-quality LiPo battery with sufficient discharge capacity to handle the current draw.
• Signal Protocol: Verify that your flight controller or receiver supports the desired signal protocol (e.g., DShot).
• Wiring: Double-check all connections before powering on to avoid short circuits or damage to the ESC.

While the ESC 4in1 25A is typically used with flight controllers, it can also be controlled using an Arduino UNO for basic applications. Below is an example code snippet to control one motor using PWM:

#include <Servo.h> // Include the Servo library for PWM control

Servo motor1; // Create a Servo object for Motor 1

void setup() {
  motor1.attach(9); // Attach Motor 1 signal wire to pin 9
  motor1.writeMicroseconds(1000); // Set initial throttle to 0 (1000us)
  delay(2000); // Wait for ESC to initialize
}

void loop() {
  motor1.writeMicroseconds(1500); // Set throttle to 50% (1500us)
  delay(5000); // Run motor at 50% for 5 seconds

  motor1.writeMicroseconds(1000); // Stop the motor (1000us)
  delay(5000); // Wait for 5 seconds before repeating
}

1. Motors Not Spinning

   • Cause: Incorrect signal input or throttle calibration.
   • Solution: Verify signal connections and recalibrate the throttle using BLHeli_S software.

2. Overheating

   • Cause: Insufficient cooling or excessive current draw.
   • Solution: Ensure proper airflow and use a battery with adequate discharge capacity.

3. ESC Not Powering On

   • Cause: Incorrect battery connection or low battery voltage.
   • Solution: Check the VBAT+ and GND connections and ensure the battery is charged.

4. Telemetry Not Working

   • Cause: Unsupported flight controller or incorrect wiring.
   • Solution: Verify that your flight controller supports telemetry and check the TLM connection.

• Can I use this ESC with brushed motors? No, the ESC 4in1 25A is designed for brushless motors only.

• What firmware does this ESC use? The ESC is compatible with BLHeli_S firmware.

• Can I use this ESC with a 7S LiPo battery? No, the maximum supported input voltage is 6S (22.2V).

• Is this ESC waterproof? No, the ESC is not waterproof. Use waterproofing measures if operating in wet conditions.

This concludes the documentation for the ESC 4in1 25A. For further assistance, refer to the manufacturer's support resources.