Spinning a dial is a pretty standard method of input, but when combined with this Grove circular LED array, it closes the feedback loop with a visual indicator.

Although usable on it’s own, it features a 25x25mm (1 x 1″) cutout to accommodate a Grove encoder, but is pretty happy being used as just a ring display.

Specifications:

• 24 LEDs
• My-Semi MY9221 12 channel LED driver IC
• Data and Clock line driven interface
• 5.5mA drive current
• Arduino animations library
• 4.5-5.5V operation
• 4.5cm (1.77″) diameter
• 12g (0.42oz)

Documentation:

• Seeed Wiki Page