The Micro WS2812 2020 RGB LED Matrix is a micro 25x25 mm 8x8 WS2812-2020 matrix. It's only about 1 square inch, or about a quarter the size of the United States. This micromatrix is daisy chainable, meaning you can stack boards side by side while using only one data pin. Best of all, this matrix is compatible with all other WS2812 related matrix codes and is open source. Despite its small stature, this matrix has everything you need, with pad connections for VCC, ground, data in, and data out. It works with 3.3 V or 5 V and is capable of outputting 16 mA per LED.
12V Offline Flyback Converter Using the MAX17595
The MAX15038 is a synchronous buck converter which delivers up to 4A load current at output voltages from 0.6V to 90% of VIN. The integrated circuit (IC) supports the input voltage from 2.9V to 5.5V. The total output error is less than ±1% overload, line, and temperature ranges