3mm Two-Color LED Module

Wiring Connections:

• Common Cathode: One common negative connection for both LED colors. The two positive connections are for the different LED colors.
• Common Anode: One common positive connection for both LED colors. The two negative connections are for the different LED colors.
• Pinout: the LED module has three pins—one for the common connection (either positive or negative) and one for each color.

Power:

• Voltage Supply: Ensure the supply voltage matches the required forward voltage of the LEDs. Usually, around 2V to 3V per color.
• Current Limiting: Use an appropriate current-limiting resistor to prevent excessive current that could damage the LEDs.

Input and Output:

• Input: Apply the correct voltage to the module’s pins according to the type of LED (common anode or cathode).
• Output: The module will display the respective color based on the voltage applied to the specific LED pin.

Physical Characteristics:

• Size: The LED module has a 3mm diameter, making it small and easy to mount in tight spaces.
• Package Type: Usually found in a through-hole configuration suitable for breadboards and PCB mounting.
• Shape: Round, with a clear or colored lens depending on the LED type.

Technical Specifications:

• Forward Voltage: Approximately 2V to 3V per color.
• Forward Current:  20mA per LED color.
• Luminous Intensity: Depends on the specific LED type and manufacturer, usually indicated in mcd (millicandela).

Additional Features:

• Durability: Designed to be robust and durable for use in various electronic applications.
• Brightness Control: Can be controlled using PWM (Pulse Width Modulation) for varying brightness levels.
• Color Mixing: By adjusting the voltage to each LED, you can mix colors to create different hues.

How to Use:

1. Identify the Pins:
   • Determine whether the LED module is a common anode or common cathode type and identify the corresponding pins for the common connection and individual colors.
2. Connect the Power Supply:
   • For a common cathode module, connect the common cathode pin to the negative terminal of the power supply and each color pin to the positive terminal through a current-limiting resistor.
   • For a common anode module, connect the common anode pin to the positive terminal of the power supply and each color pin to the negative terminal through a current-limiting resistor.
3. Add Current-Limiting Resistors:
   • Calculate and add appropriate resistors to limit the current through each LED to avoid damage. Use Ohm’s Law to determine the correct resistor value based on the power supply voltage and LED forward voltage.
4. Test the LED:
   • Apply power and test the module by varying the voltage to the individual color pins to see the different colors.
5. Integrate into Circuit:
   • Use the LED module as part of your circuit design to provide visual feedback or indicators in your projects.

Applications:

• Status Indicators: Use in electronic devices to indicate status or operation modes.
• Decorative Lighting: Ideal for decorative and lighting applications where space is limited.
• Educational Projects: A great component for learning and experimenting with LEDs and basic electronics.

The 3mm Two-Color LED Module is a compact and versatile component designed for applications where visual indication is required. Its small size and dual-color functionality make it suitable for various electronics projects, from status indicators to decorative lighting. Proper connection and use of current-limiting resistors ensure reliable performance and longevity of the module.