4-Digit Display with TTL, SPI and I2C interface

Module built around a classic 4 digit 7-segment display and an ATMega328 microcontroller with the Arduino bootloader. It can be driven in three ways: TTL serial, SPI or I²C. It shows numbers, many letters and a few special characters. FTDI pads are also provided for programming from the Arduino IDE.

• Red 4-digit alphanumeric display with serial interface: TTL, SPI or I²C
• It shows numbers, many letters and a few special characters. 
• Individual control of decimal points, apostrophe and colon
• Selectable baud rate
• Selectable brightness
• Baud rate and brightness settings kept in non-volatile memory
• Individual segment control for every digit
• Dimensions (mm): 41 x 23 

• Schematic
• Eagle Files
• Datasheet
• Hookup Guide
• Arduino Add-On
• Github Repo