CrossRoads:
If you only need 2 digits, how about a small 2-digit seven segment display?
Sparkfun carries this little 4-digit bubble display, I use 2 of them on this 8-digit display board
Ya, that's very similar to what I was planning. a 2 digit, 7 segment display, which operates on SPI. The problem is I can't find a 2 digit one. I found some 4 digits ones though.
Do you know of a 2 digit, 7 segment display, that works with SPI? One design constraint is I only have 8 wires to go between the Arduino and the breakout box, which is where the rotary encoder with push button and the display goes.
Rotary encoder/push button needs 5 wires: Vcc, GND, 1 data wire for button, 2 data wires for rotary encoder.
7 Segment display, with SPI, needs 5 wires, but only 3 additional: (Vcc and GND shared with rotary encoder) then SCK, CS and SI.