Fully automated game of Connect 4! push a button in the column you want to drop your piece and it will fall there. Its pretty redstone heavy because I had to keep all the wires separate but it works great!
Feel free to change the room to your liking, but all blocks around the redstone are important.
In case the sign doesn't load properly all it says is:
I saved the file standing in the game room looking at the game board facing East, which might help you plan your //paste.