I needed a simple case to house a MAX7219 panel and an ESP8266 (NodeMCU 1.0 - CP2102) for a project at our local maker space. Minimal soldering, some simple wiring, and I wrote a sketch that uses an NTP server then displays the time, date and a user defined custom message.

Powered off any USB port or cellphone wall adapter.

Edit Nov 8, 2018 - Updated ALL items to provide a sloping case, better slide in mount, strain relief for USB cable and two mounts depending on the type of LED Matrix Panel in use (mounting holes are different).

Dec 21, 2018 - Added large matrix mount that will accept an ESP32 Dev board.

June 7, 2019 - Added a more universal matrix panel mount - 16L