LED MR16 – Display PCB

9-LED Circular Display Board

LED MR16 9-LED Display Board for 3 or 5mm LEDs or with Piranha LEDs - Bare Board and with LEDs installed

Light Emitting Diodes (LEDs) are an attractive, economical, and convenient option for lighting applications. Available in a wide variety of colors, styles, sizes, and intensities, LEDs provide inexpensive, highly efficient, low-voltage, reliable lighting solutions. Applications range from lighting in aquariums, recreational vehicles, marine and aircraft to computer case mods, under-vehicle lighting, emergency/security lighting, and accent lighting in the kitchen and around your home – the options are endless.

Related Products

We carry a selection of associated products in the MR16 family. Be sure to see our complete selection. Also see our LED Spotlight which holds 24 3mm, 5mm LEDs, or LED Spotlight IR which holds Infrared (IR) LEDs. For smaller requirements, see our LED Spotlight Junior which holds 18 LEDs.


One challenge with LEDs is the mounting of the displays. We produce several innovative solutions, including the LED MR16.

The LED MR16 holds the LEDs on a compact 1 7/8″ (48mm) diameter board. Designed to fit into standard MR16 downlight frames (12v 50W halogen frames) and holds nine 5mm or Super Flux/Piranha 4-pin LEDs, an exclusive, unique feature of our board.

A total of three separate inputs has been provided, allowing for the placement of three colors of LEDs on the board. Install Red LEDs at R1, R2 & R3; Blue LEDs at B1, B2 & B3; and Green LEDs at G1, G2 & G3. The LED MR16 can use a single color LED – such as white to provide a spotlight effect, just populate LEDs at each position on the board. This setup is very common for white-only or Infrared (IR) LED applications.

Constructions and Instructions

Construction of the board is incredibly simple and can be completed by the novice builder in less than 30 minutes requiring only minimal soldering skills. With only nine LEDs and three resistors, this system is likely to be one of the simplest and most satisfying kits you will ever construct.

A complete instruction manual, which includes a construction guide and schematics for the LED MR16 is available for download.