{"title":"Discrete LEDs — 3mm, 5mm, 10mm \u0026 RGB","description":"\u003cp\u003eBuild, prototype, and indicate with our complete range of \u003cstrong\u003ediscrete through-hole LEDs and RGB LED modules\u003c\/strong\u003e. From standard 3mm, 5mm, and 10mm single-color diffused LEDs in red, green, yellow, and blue, to full-color 5mm RGB LEDs in common cathode and common anode configurations, and WS2812B-compatible addressable RGB LED modules — every LED component for Arduino, breadboard, and custom PCB projects is here.\u003c\/p\u003e\u003cp\u003eAll LEDs in this collection are supplied in multi-packs for prototyping and small production runs. Single-color LEDs are available in 3mm (compact PCB layouts), 5mm (standard breadboard), and 10mm (high-visibility panel indicators) sizes. RGB LEDs provide full-color mixing from a single component. WS2812B modules add individually addressable full-color control from a single GPIO pin.\u003c\/p\u003e\u003ch3\u003eWhat’s in This Collection?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed LEDs\u003c\/strong\u003e — 3mm (10-pack), 5mm (10-pack), 10mm (5-pack); diffused lens; Vf ~1.8–2.2V; universal stop\/error\/alert indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreen LEDs\u003c\/strong\u003e — 3mm (10-pack), 5mm (10-pack), 10mm (5-pack); diffused lens; Vf ~2.0–2.4V; universal go\/ok\/power-on indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYellow LEDs\u003c\/strong\u003e — 3mm (10-pack), 5mm (10-pack), 10mm (5-pack); diffused lens; Vf ~2.0–2.2V; universal caution\/warning indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue LEDs\u003c\/strong\u003e — 3mm (10-pack), 5mm (10-pack); diffused lens; Vf ~3.0–3.4V; power and connectivity indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRGB LEDs 5mm\u003c\/strong\u003e — common cathode (5-pack) and common anode (5-pack); clear lens; full RGB color mixing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWS2812B RGB LED modules\u003c\/strong\u003e — single LED and 8-bit board; NeoPixel\/FastLED compatible; 24-bit color; chainable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraffic light LED module\u003c\/strong\u003e — red\/yellow\/green on one PCB; pre-installed resistors; for Arduino beginner projects\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow to Choose the Right LED Size\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3mm:\u003c\/strong\u003e Compact PCB layouts, wearable electronics, space-constrained enclosures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5mm:\u003c\/strong\u003e Standard breadboard and PCB; the most versatile and widely used size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm:\u003c\/strong\u003e Panel indicators, control boards, high-visibility applications viewed from a distance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRGB 5mm:\u003c\/strong\u003e Full-color indicator from a single component; common cathode for most Arduino circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWS2812B module:\u003c\/strong\u003e Individually addressable full-color control; chainable for custom LED arrays\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eArduino Wiring Quick Reference\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed\/Green\/Yellow (5V):\u003c\/strong\u003e 220–330Ω resistor in series with anode; cathode to GND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue (5V):\u003c\/strong\u003e 100–150Ω resistor in series with anode; cathode to GND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRGB common cathode:\u003c\/strong\u003e 3 resistors (one per channel); cathode to GND; anodes to GPIO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWS2812B:\u003c\/strong\u003e VCC to 5V; GND to GND; DIN to any GPIO; use NeoPixel or FastLED library\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"red-led-indicator-module-digital-output-arduino","title":"Red LED Indicator Module — Digital Output, Arduino","description":"\u003ch2\u003eRed LED Indicator Module — Digital Output, Arduino (KY-011 Compatible)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003ered LED indicator module\u003c\/strong\u003e is the simplest and most beginner-friendly LED component for Arduino projects. Unlike bare LEDs that require a separate current-limiting resistor and careful wiring, this module has the \u003cstrong\u003ecurrent-limiting resistor pre-installed on the PCB\u003c\/strong\u003e — simply connect VCC, GND, and a digital output pin, and the LED is ready to use with no additional components required.\u003c\/p\u003e\u003cp\u003eCompatible with the popular \u003cstrong\u003eKY-011 LED module\u003c\/strong\u003e pinout, this module integrates directly into Arduino sensor kits and 37-in-1 sensor kit projects. 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At \u003cstrong\u003e3mm diameter\u003c\/strong\u003e, this LED fits into tight PCB layouts and compact enclosures where standard 5mm LEDs are too large — making it the preferred choice for miniature electronics, wearable projects, and any application where a small footprint is essential.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003ediffused lens\u003c\/strong\u003e scatters light evenly across a wide viewing angle, providing omnidirectional visibility even in compact installations. Blue LEDs have a higher forward voltage than red, yellow, and green LEDs (typically 3.0–3.4V), making them compatible with both 3.3V and 5V Arduino circuits with a current-limiting resistor. 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With a \u003cstrong\u003ediffused lens\u003c\/strong\u003e that scatters light evenly across a wide viewing angle, this LED is visible from virtually any direction — making it the preferred choice for status indicators, power-on lights, and any application where omnidirectional visibility is important.\u003c\/p\u003e\u003cp\u003eBlue LEDs have a higher forward voltage than red, yellow, and green LEDs (typically 3.0–3.4V), making them ideal for 3.3V and 5V Arduino circuits with a current-limiting resistor. The 5mm through-hole package is breadboard-compatible and fits standard PCB LED footprints. 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Green is the universal go\/ok\/power-on color in electronics — instantly communicating a normal, ready, or active state. Whether you’re building a traffic light project, a battery level indicator, or a multi-state status display, the green LED is the essential “all clear” signal.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003ediffused lens\u003c\/strong\u003e scatters light evenly across a wide viewing angle, providing omnidirectional visibility. Green LEDs have a forward voltage of approximately 2.0–2.4V, making them compatible with both 3.3V and 5V Arduino circuits with a current-limiting resistor. 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At \u003cstrong\u003e10mm diameter\u003c\/strong\u003e — more than twice the size of standard 5mm LEDs — this LED is clearly visible from across a room, making it the preferred choice for control panel indicators, machine status lights, and any application where the LED must be seen at a distance or in bright ambient lighting.\u003c\/p\u003e\u003cp\u003eGreen is the universal go\/ok\/power-on color in electronics and traffic signaling. The \u003cstrong\u003ediffused lens\u003c\/strong\u003e provides a wide viewing angle for omnidirectional visibility. 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Yellow is the universal caution\/warning color in electronics and traffic signaling — instantly communicating a standby, processing, or warning state. Whether you’re building a traffic light project, a battery level indicator, or a multi-state status display, the yellow LED is the essential middle signal.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003ediffused lens\u003c\/strong\u003e scatters light evenly across a wide viewing angle, providing omnidirectional visibility. Yellow LEDs have a forward voltage of approximately 2.0–2.2V, making them compatible with both 3.3V and 5V Arduino circuits with a current-limiting resistor. 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