This is a unique ring - it has a florid body with 24 controllable LEDs. Maybe it will drive the inspiration out of you to make a glowing magic ring! There is a 1*1 square hollow-out in the middle of this module, where you can place a Grove - Encoder in and make it a rotary visual encoder!
24 LEDs, about 5.5 mA drive current for each channel.
Controllable LEDs with florid effects
Current: 5.5mA (for each LED)
Dimension: 4.5cm (ring diameter)
Net Weight: 12g
For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product.
|Dimensions||90mm x120mm x7.5mm|
|Grove - Circular LED||1|
Grove - Circular LED
Wiki of Grove - Circular LED
The square hole in the middle is what I was initially trying to figure out. It says 1x1 above, and I'm not sure if that's supposed to be in cm or not, but the encoder's dimensions are stated as 20x20mm. Further, I can't see how the ring diameter on thiQuestion by: admin on 2018-12-18 02:34:53
The square in the center is 1.5 cm x 1.5 cm. Please read my comment above about trying to use these displays with the 16 MHz or slower Arduinos. They work just fine with the faster 260 MHz LinkIt ONE board.Answer by: admin on 2018-12-18 02:34:53
Hi can I connect 3 of theses with 3 Encoder to a single Arduino Uno Rev 3 with Grove Base shield V2?Question by: admin on 2018-12-18 02:34:52
The encoder library uses an interupt so you would have to write your own modifications to be able to use more than one encoder at a time. It takes two digital lines each for the encoder and the CircularLED. Three sets of them would require 12 digital lAnswer by: admin on 2018-12-18 02:34:52
Question by: admin on 2018-12-18 02:34:52
That's a good suggestion, we would take it into a consideration. Thanks for your attention.Answer by: admin on 2018-12-18 02:34:52
From looking at the MY9221 data sheet, it looks like this device ought to work on 3.3V. Has anyone operated one at 3.3V?
Several of these would make a great addition to a "wearable" project.Question by: admin on 2018-12-18 02:34:52
Hi~It seems can not run this device at 3.3V.and you can refer to the Description Voltage: 4.5V~5.5V.with a nice day~Answer by: admin on 2018-12-18 02:34:52