A digital LED ring of 40 WS2812B addressable RGB LEDs.
These LEDs are the same type that are sold as NeoPixels where each LED is separately addressable using a serial bus.
The colour and brightness of each LED can be controlled separately.
The rings are chainable - connect the output pin of one to the input pin of another.
The communication used with the LEDs is a 1-wire interface specific to these devices.
There are several libraries available to handle the interfacing details including the Adafruit NeoPixel library and the more advanced FastLED library, both of which are supplied with the Arduino IDE.
This 40-LED ring consists of four quarters and at the bottom of the PCB are solder pads for soldering wires.
This 40-LED ring consists of a set of four quarters that need to be soldered together to form a ring.
At the back of the PCB are solder pads. The solder pads can be used for this, the use of the included pin headers might be helpful.
Please note, make sure that the data pins at the beginning/end are not connected!
The same solder pads are used for connecting wires.
These rings are not Adafruit products. 'NeoPixel' and 'Adafruit' are registered trademarks of Limor Fried.
Resources:
Arduino - FastLED - http://fastled.io/
Raspberry Pi - https://github.com/jgarff/rpi_ws281x
ESP32 - https://iotdesignpro.com/projects/controlling-ws2812-neopixel-led-with-esp32-using-blynk-app
Specifications:
Number of LEDs : 40
LED chip : WS2812B
LED chip size : 5050
Input voltage : 5VDC
Interface : 5V, GND, DIN, DOUT
Maximum current per LED : ~60mA (white at full brightness)
Maximum current ring : ~2.4A (white at full brightness)
Circuit board colour : Black
Ring size (outside diameter) : 154mm
Ring size (inside diameter) : 142mm
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