LED matrix

thingiverse

LED Matrix Display: https://pihrt.com/elektronika/341-arduino-uno-led-matrix-newspaper-with-themometer\r\n\r\nThis device displays information (text) from an SD card (including Czech diacritics), and also shows temperature and humidity of the air (option to connect external DS18B20 sensor). Text scroll speed can be set with a trimmer on the board. The LED panel adjusts its brightness according to surrounding lighting (it shines full in daylight and dims at night). In version HW 3 and above, the LED matrix panel synchronizes with Internet time via NTP (also sets the DS1307 circuit, backed up by CR2032 battery - so time keeps running even without internet connection), alarm settings. The circuit can serve as a promotional information board or "cool" clock for a bedroom...