5mm Yellow LED Diffused High Brightness Indicator Light

5mm Yellow LED – Diffused High Brightness Indicator Light

The 5mm Yellow Diffused LED is a classic warning and status indicator light with a warm amber-yellow emission and wide diffused viewing angle. It is widely used alongside red and green LEDs in traffic light simulations, multi-status indicator panels, and visual alert circuits.

Key Specifications

• Color: Yellow (Amber)
• Lens Type: Diffused (wide viewing angle ~60°)
• Diameter: 5mm
• Forward Voltage (V₀): ~2.0–2.2V
• Forward Current (I₀): 20mA (max)
• Luminous Intensity: High brightness
• Wavelength: ~585–595 nm
• Mounting: Through Hole, 2-pin

Compatibility & Use Cases

Directly compatible with Arduino, ESP32, NodeMCU, and Raspberry Pi GPIO pins when used with a current-limiting resistor (220Ω for 5V, 68Ω for 3.3V). Common applications include:

• Warning and caution indicator lights in enclosures
• Traffic light simulation circuits (red, yellow, green)
• Multi-status indicator panels for IoT dashboards
• Standby and processing state indicators
• STEM and beginner electronics project builds

Combine with red and green 5mm LEDs from Xsortex HUB for a complete traffic light or multi-state indicator system.

Frequently Asked Questions

Which leg is positive?
The longer leg is the anode (+) and connects through a resistor to your GPIO pin. The shorter leg by the flat edge of the LED rim is the cathode (−) and goes to ground.

What resistor do I need?
220Ω on a 5V Arduino supply, or about 68–100Ω on a 3.3V board like ESP32. One resistor per LED, always in series.

Can I build a traffic light project with this?
Yes, that is the classic use. Pair this yellow LED with our 5mm red and green LEDs and three GPIO pins, and you have a complete traffic signal simulation ready to code.

Why does my LED not light up?
The two common causes are reversed polarity (swap the legs) and a missing resistor path. Check that anode goes to positive, cathode to ground, and that a resistor limits the current.

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