SparkFun
LED - Assorted with Resistor 5mm (20 pack)
A convenient pack of 20 assorted 5mm LEDs with built-in resistors — no need to calculate or add external current-limiting resistors. Simply connect to 3.0–5....
A convenient pack of 20 assorted 5mm LEDs with built-in resistors — no need to calculate or add external current-limiting resistors. Simply connect to 3.0–5.0V and you're ready to go, making these perfect for quick prototyping, breadboard experiments, and beginner projects.
The pack includes five LEDs in each of four colours (blue, red, green, and yellow), all packaged in reusable ESD-safe bags to protect them until you're ready to use them.
Key Features
- Built-in Resistor – No external resistor needed; prevents accidental burnout
- 3.0–5.0V Operating Range – Works directly with Arduino, Raspberry Pi GPIO, and standard breadboard power
- Four Colours – Blue, red, green, and yellow (5× each)
- 5mm Standard Size – Fits standard LED mounts and breadboard holes
- ESD-Safe Packaging – Reusable anti-static bags for safe storage
Ideal For
- Breadboard prototyping and quick circuit builds
- Arduino and microcontroller indicator lights
- Electronics education and beginner projects
- Status indicators in enclosures and panels
Package Contents
- 5× Blue 5mm LEDs (with built-in resistor)
- 5× Red 5mm LEDs (with built-in resistor)
- 5× Green 5mm LEDs (with built-in resistor)
- 5× Yellow 5mm LEDs (with built-in resistor)
Jargon buster
Plain-language definitions for the technical terms used above.
- anti-static
- Anti-static materials help drain away small static charges instead of letting them build up. This can matter for clothing, brushes, or handling electronics where static discharge could be annoying or damaging.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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