This is the internal frame for the 28cm x 28cm picture frame that should be converted to a 16x16 LED display for pixel art.

The LED picture frame can hold 256 LEDs and is controlled with a NodeMCU ESP8266.

The measurements are: 28cm x 28cm x 2cm

The following parts with prices in Amazon:

• SK6812 300 LEDs 5m 58,99€ (you can also take a non waterproof version)
• Frame 15,95€
• NodeMCU 6,99€
• Cabels
• Micro USB Cable
• 5V 3A USB Power

Total costs about 90€

Tools:

• Soldering iron
• Tape

Sourcecode and examples will follow soon.