LED4N 4 Digit Numeric LED Display - $34

The Industrologic LED4N is an easy to interface and easy to program 4 character numeric LED display that can be used with nearly any microcontroller or Programmable Logic Controller (PLC). It is based on a 4-digit 7 segment "clock stick" LED display with red 0.4 inch height numbers, a decimal point for each number, and a clock style colon.

The LED4N requires only +5 and ground power connections along with 2 logic level outputs from the circuit driving the display, and uses an extremely simple protocol that can be easily created on nearly any microcontroller board or Programmable Logic Controller (PLC).

The LED4N has microcontroller controlled display segments with character sets for numeric and selected alpha characters, as well as selected punctuation.

http://www.industrologic.com