rawdust

Here is the schematic to hook up the parts.

First let's make the display. Wire segments a-g from both displays together and then wire them to Digital0-Digital6. Take a resistor to each common cathode and wire them to Digital7 and Digital8. Here is what the display will look like

You can see the resistors for both of the displays.

For the other resistors and the transistor, we use another piece of perfboard.

Now finish the wiring and hook it up to the Arduino. Now time to program the Arduino.

Go to Step 3