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4-digit 7-segment displays are really neat little devices, it's a shame that they can be so cumbersome to control. Sparkfun has solved that problem by making them a little bit "smarter." The 7-Segment Serial Display combines a classic 4-digit 7-segment display and an ATMega328 microcontroller allowing you to control every segment individually using only a few serial lines.
The Serial 7-Segment Display can be controlled in one of three ways: Serial TTL communication, SPI serial communication or I2C serial. You can even program it for stand-alone operation since the ATMega328 comes pre-loaded with the Arduino bootloader! There is also an FTDI header on board and we've provided a hardware profile for the Arduino IDE to make it even easier to program.
Features:
- 4 digit blue alpha-numeric display with TTL, SPI or I2C Serial Interface
- Display numbers, most letters, and a few special characters
- Individual control of decimal points, apostrophe, and colon
- Selectable baud rate
- Selectable brightness
- Baud rate and brightness values retained in non-volatile memory
- Individual segment control for each digit
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