I am wondering if anyone has ever successfully repurposed an alarm clock display to use the 7 segment displays it has. If so, how did you do it?
You just treat it like any other 7 segment display and connect it to the arduino threw a few shift registers. You just need to either find the data sheet on the screen or sit down with power source and a current limiting resistor and start testing each pin to map out which pin goes to which segment on the display.