This is a Binary decoder with a 7 segment display output. It took about a week. It consists of: a binary to decimal decoder, a decimal to 7 segment converter and a 7 segment display.
Feel free to use it but give me credit.

To use:

1. Ensure the lever on the right is up (not essential but good for aesthetics)
2. Pull down the levers you want to be on
3. Pull the lever on the right down