24 RGB LED for your rotary encoder on the I2C bus
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What is it? This is an accessory for the rotary encoder. There are 24 RGB LED disposed in a circle, the diameter of the circle is 40mm. There is also a 9mm hole in the center where it's possible to i…
Read More…This is an accessory for the rotary encoder. There are 24 RGB LED disposed in a circle, the diameter of the circle is 40mm.
There is also a 9mm hole in the center where it's possible to insert the rotary encoder. All the LEDs can be controlled individually with the i2c bus, the resolution is 24bit for each RGB led.
The controller is the IS31FL3746A, it has several features like:
It's possible to connect up to 16 RGB LED rings on the same bus. The PCB comes already assembled and tested, no components soldering is required.
There are several alternatives made with the WS2812, but the LEDs are big with a low density. The RGB LED Ring density is higher because it uses a 2x2mm RGB LED.
With 24 LEDs, it has exactly double of the number of the most common rotary encoders. In this way, it's possible to make some effects without losing in resolution. The LEDs used are the NH-Z1921RGBA-SG used for outdoor display.
There are 8 SMD Jumpers where it's possible to set 16 different I2C address. It also has another SMD jumper where it's possible to enable the pull-up resistor on the I2C bus.
There are two MOLEX-532610571 connectors with the following pinout
| Name | Description | Voltage level |
|---|---|---|
| VCC | LED supply voltage | 2.7V - 5.5V |
| GND | Ground | 0V |
| VIO | Logic supply voltage | 2.7 - 5.5V |
| SDA | I2C data | Same as VIO |
| SCL | I2C clock | Same as VIO |
VCC and VIO can be different, for example VCC=5V and VIO=3.3V. With VCC=5V and all the LEDs on the current consumption is around 450mA, make sure that you power supply can give that much current!
Used for connecting multiple boards connectors
Used for connecting one board to the controller
The documentations of the project is available on GitHub
There are the:
The package includes 1 RGB LED Ring small assembled and tested.
The cable is required, please choose among the two types.
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