The purpose of this project was to create a small, compact, minimal PCB that could drive WS2812B LED strips for an Adalight system and similar purposes. It uses the Attiny1614.
The PCB can drive 2 strips from its headers (with the necessary capacitors) and includes 4 other GPIO pins. In addition to status and programmable LEDs, the PCB also contains a serial-enabled USB port. (This USB port does not provide power)
Pins A6 and A7 (2 and 3 in Arduino) are connected to onboard LEDs. A1 and A2 (6 and 7 in Arduino) are connected to the LED headers.
More information on the Attiny1614 can be found here
More information on the USB to UART converter can be found here
See PDF here
The Attiny is programmed over UDPI. I used an Arduino Uno and this library although it is no longer being maintained.
As FastLED is not supported by the hardware, I ported the Adalight-FastLED library to work with tinyNeoPixel (port) which is included in the ATTinyCore library