3CH RC Servo Tester & ESC Checker

RC 3CH Digital Servo Tester & ESC Consistency Master Checker

Introducing the ultimate diagnostic tool for your RC and DIY electronics projects: the 3-Channel Digital Servo and ESC Tester. This compact, MCU-controlled device is a must-have for any hobbyist, allowing you to test, calibrate, and diagnose your servos and electronic speed controllers (ESCs) with precision, all without needing a transmitter or receiver. Whether you are building an RC plane, helicopter, car, boat, or a custom robotics project, this tester from Bigyan Project provides the good stability and high accuracy you need to ensure your components are working perfectly.

This versatile tool functions as a "Hand Dynamic Receiver," simulating the signals from your transmitter with a simple-to-use knob. It can simultaneously connect and test up to three servos, making it an invaluable asset for checking consistency. This is especially critical for CCPM (Collective Pitch Cyclic Mixing) helicopter setups, where three servos must move in perfect synchronization. It can also identify servo jitter, find the precise neutral point for installation, and test the full range of motion. For motor testing, simply connect your ESC (brushed or brushless) to get rid of cumbersome remote-control setups and perform manual speed control tests easily.

Product Specifications

Features

• Three-in-One Functionality: Acts as a servo tester, ESC tester, and CCPM consistency master.
• Three Selectable Modes: Easily switch between modes with a push button to meet different testing needs.
• Manual Mode: Turn the knob to check servo reaction time, speed, and positioning at any point in its range.
• Neutral Mode: Instantly brings the servo to its 1.5ms center point, perfect for installation and setup.
• Automatic Mode: Automatically sweeps the servo back and forth (like a "window wiper") to test its full range and check for any binding or inconsistencies.
• Multi-Channel Testing: Connect and test up to 3 servos simultaneously to check their consistency and ensure they travel together.
• MCU Control: A built-in microcontroller provides a stable, accurate, and reliable PWM signal output.
• Compact & Lightweight: Extremely portable at only 8 grams, making it perfect for your field kit or workbench.
• LED Indicators: Bright blue LEDs clearly show which mode is currently active.

Applications / Use Cases

• Testing new servos before installation to check for dead-on-arrival units.
• Diagnosing servos after a crash to detect stripped gears or jitter.
• Finding and setting the precise neutral position for servo arms.
• Checking the consistency of multiple servos (e.g., for ailerons or CCPM).
• Testing Electronic Speed Controllers (ESCs) and motors (brushed or brushless).
• Manually controlling an ESC to check motor direction and performance.
• Essential tool for RC Helicopter, Airplane, Car, Boat, and Drone builders.
• Perfect for robotics and various DIY electronics projects from বিজ্ঞান প্রজেক্ট (Bigyan Project) that use PWM-controlled devices.

User Guide / How to Use

• For Testing Servos:
  1. Connect a 4.8V-6V power source (like a 4xAA battery pack or a BEC) to the 'IN' pins. Observe polarity (Negative '-', Positive '+', Signal 'S' is ignored).
  2. Connect the servo(s) you wish to test to the 'OUT' pin headers (up to 3).
  3. The blue LEDs will light up. Press the 'Select' button to choose your mode.
  4. In 'Manual Mode', turn the knob to test the servo's movement.
• For Testing ESCs (Important!):
  1. SAFETY FIRST: Always remove the propeller or pinion gear from the motor.
  2. Connect the motor to the ESC's motor-out wires.
  3. Connect the ESC's 3-pin receiver plug to one of the 'OUT' channels on the tester. Ensure the signal wire (usually white or yellow) aligns with the 'S' pin.
  4. DO NOT connect a separate power supply to the 'IN' port. The ESC's internal BEC will power the tester.
  5. Turn the tester's knob fully counter-clockwise (minimum position).
  6. Connect the main battery (LiPo, NiMH, etc.) to the ESC.
  7. The tester will power on. Select 'Manual Mode'. Slowly turn the knob clockwise to test the motor speed.

Frequently Asked Questions (FAQs)

• Q: How do I power the servo tester?
  A: You can use any DC 4.8V to 6.0V power source, such as a 4-cell AA battery holder or the 5V BEC output from an ESC. When testing an ESC, the ESC's own BEC will power the tester, so you don't need a separate power supply.
• Q: Can this test brushless motors?
  A: Yes. This device tests the Electronic Speed Controller (ESC). The ESC is what controls the brushless motor. This tester sends a signal to the ESC, just like a receiver would, allowing you to test the ESC and the connected motor.
• Q: What does CCPM mean?
  A: CCPM stands for Collective Pitch Cyclic Mixing. It's a system in RC helicopters that uses three servos working together. This tester is called a "CCPM Master" because its 3-channel consistency-checking feature is perfect for ensuring all three CCPM servos are matched.
• Q: My motor starts at full speed when I connect the ESC. Why?
  A: You must have the knob in the 'Manual Mode' and turned fully counter-clockwise (to the minimum throttle position) before you connect the main battery to the ESC. This calibrates the 'off' position.

Challenges and Considerations

• Power Polarity: You must be extremely careful to connect the input power with the correct polarity. Connecting the power in reverse (positive to negative) will instantly burn the IC and destroy the tester.
• ESC Testing Safety: Always remove propellers from motors during testing. An accidentally triggered motor can cause serious injury.
• Power Source: This device does not regulate voltage. Ensure your input power source is within the 4.8V-6.0V range. Using a higher voltage may damage the tester and any connected servos.
• ESC BEC: When testing an ESC, its built-in BEC powers the tester. Do not connect an external power source to the 'IN' port at the same time, as this can cause a short circuit.

Compatibility

• Compatible with all standard RC hobby servos (digital and analog).
• Compatible with virtually all brushed and brushless Electronic Speed Controllers (ESCs).
• Works with any power source providing DC 4.8V to 6.0V.
• The 1.5ms ± 0.5ms signal is the universal standard for RC hobby-grade components.

Future Enhancement Options

• Building Complex Projects: This tester is the first step in building reliable multi-servo systems, like robotic arms or complex airplane wing flaps.
• Troubleshooting Toolkit: Makes a permanent and indispensable part of your RC field box or workbench toolkit for quick diagnostics.
• CCPM Helicopter Setup: Allows for the perfect setup and synchronization of 3-servo CCPM systems for stable helicopter flight.
• DIY Robotics: Enables precise centering and limit-setting for servos in walking robots, grippers, and sensor-panning systems.

Benefits

• Save Time and Frustration: Quickly diagnose problems without needing to power up your entire transmitter and receiver system.
• Improve Build Quality: Ensure all servos are centered and synchronized for a more professional and reliable build.
• Test Safely: Provides a controlled way to test motors and ESCs on the bench, reducing risk.
• Cost-Effective: An incredibly affordable tool that can save you from damaging more expensive components.
• Highly Portable: Its small size and light weight mean you can take it anywhere.

Conclusion

The 3CH Digital RC Servo Tester & ESC Consistency Checker is an essential, low-cost tool that no RC or electronics hobbyist should be without. Its simplicity, accuracy, and 3-mode functionality provide complete control for testing, calibrating, and troubleshooting your most critical components. By allowing you to verify servo consistency and test motor systems independently, this device from Bigyan Project streamlines your building process, prevents costly mistakes, and ensures your projects perform flawlessly. It's the perfect little helper that pays for itself in just one use.

Keywords: 3CH Servo Tester, RC Servo Tester, ESC Tester, CCPM Consistency Master, Servo Checker, Digital Servo Tester, Speed Controller Checker, Motor Tester, RC Car, RC Plane, RC Helicopter, RC tool, PWM signal generator, 3 Channel Servo Tester, Servo Consistency Checker, বিজ্ঞান প্রজেক্ট, Bigyan Project