Arduino Compatible 25N Electromagnet Module for Development Kits

Arduino Compatible 25N Electromagnet Module

The 25N Electromagnet Module is a compact, high‑performance electromagnet designed for integration with popular development boards such as Arduino, Raspberry Pi, and various microcontroller platforms. With a maximum holding force of 2.5 kg (≈25 N), it strikes an optimal balance between strength and power consumption, making it ideal for educational projects, robotics, automation prototypes, and hobbyist experiments.

Key Technical Specifications

• Maximum Holding Force: 2.5 kg (25 N)
• Operating Voltage: 5 V DC (typical for Arduino and similar boards)
• Current Draw: Approximately 200 mA under full load
• Core Material: Soft iron core with high magnetic permeability
• Coil Construction: Enamelled copper wire wound in a tight, uniform pattern for efficient flux generation
• Dimensions: 25 mm diameter, 20 mm length (compact enough to fit on most breadboards or shielded headers)
• Mounting: Standard 2.54 mm pitch header pins for direct connection to Arduino digital outputs
• Operating Temperature Range: –40 °C to +85 °C (suitable for most indoor and mild outdoor applications)

Design Features That Enhance Usability

The module incorporates several thoughtful design elements that simplify integration into a wide range of projects:

• Integrated Flyback Diode: Protects the driving microcontroller from voltage spikes generated when the electromagnet is switched off.
• Thermal Management: The coil’s geometry and core material are engineered to dissipate heat efficiently, preventing overheating during prolonged operation.
• Low Profile Housing: A minimalistic plastic enclosure keeps the module lightweight while shielding internal components from accidental short circuits.
• Clear Labeling: Each pin is labeled (VCC, GND, OUT) to reduce wiring errors during prototyping.

Typical Applications

This electromagnet module excels in a variety of scenarios where precise magnetic actuation is required:

• Magnetic Grippers: In robotics, the module can lift and hold small metal objects such as screws or bolts.
• Automated Sorting Systems: Use the magnet to separate ferrous materials from non‑ferrous streams in educational sorting projects.
• Interactive Exhibits: Create touch‑sensitive displays where a magnetic field triggers sensors or actuators.
• Magnetic Switches: Combine with Hall effect sensors to build simple on/off switches that respond to the presence of metal.
• Educational Demonstrations: Illustrate principles of electromagnetism, magnetic flux, and inductive coupling in physics labs.

Integration Guide for Arduino Platforms

Below is a step‑by‑step outline to connect the 25N module to an Arduino Uno or similar board:

1. Connect Power: Wire the VCC pin of the module to the Arduino’s 5 V output.
2. Ground Connection: Attach the GND pin to one of the Arduino’s ground pins.
3. Control Pin: Connect the OUT pin to a digital I/O pin (e.g., D8).
4. Code Example: Use the following sketch to toggle the magnet on and off every second:

   void setup() {
     pinMode(8, OUTPUT);
   }
   void loop() {
     digitalWrite(8, HIGH); // Activate electromagnet
     delay(1000);
     digitalWrite(8, LOW);  // Deactivate
     delay(1000);
   }
   

5. Safety Note: Ensure the module is placed on a non‑conductive surface to avoid accidental short circuits.

Power Management Tips

Because the electromagnet draws significant current when active, consider these strategies to maintain system stability:

• Use a Separate Power Supply: For projects with multiple modules or high‑current loads, supply the magnet from an independent regulated source.
• Add a Current Limiting Resistor: Place a resistor in series with the control pin to limit surge current during startup.
• Employ PWM Control: Modulate the duty cycle of the digital output to reduce average power consumption while maintaining sufficient magnetic force for brief periods.

Testing and Calibration

To verify performance, measure the holding force using a small load cell or by balancing a known weight against the magnet. Adjust the duty cycle or supply voltage if you need to fine‑tune the magnetic strength for specific tasks.

Compatibility with Development Kits

The module’s 2.54 mm header pitch and standard pinout make it compatible with a wide array of development kits:

• Arduino Uno, Mega, Nano, Leonardo
• Raspberry Pi (via GPIO with level shifting)
• BBC micro:bit (through an I/O expander or level shifter)
• Calliope mini and other educational boards
• ASUS Tinker Board and similar single‑board computers

Conclusion

The Arduino Compatible 25N Electromagnet Module offers a reliable, easy‑to‑use solution for adding magnetic actuation to any prototyping or educational project. Its robust construction, clear labeling, and thoughtful safety features enable developers of all skill levels to experiment with electromagnetism without the need for complex circuitry or specialized components.