WS2812 24 LED Ring

24 Addressable WS2812 LED's on a circular PCB.

Large 24 LED Ring.  WS2812 LED's on a circular PCB - Large Diameter

A 24 LED Ring with fully addressable RGB LEDs WS2812B in the big 5050 SMD package (5×5 mm), fully controllable by a single wire serial connection from a microcontroller.

The modules have mounting holes and can be cascaded to build bigger arrangements.

Diameter inside: 72mm
Diameter outside: 86mm

Every LED contains its own 18mA constant-current driver, and an addressable driver chip, and will work without any current limiting resistors on a power supply of 4-7V.

Since the data protocol is quite timing-specific, you will need a faster microcontroller (at least 8MHz) to control it. You can use it for example with an AVR and Arduino, PIC, STM32 or similar controller. You will have no luck with “interpreted” controllers like Basic Stamp or Picaxe.