Step 3: Schematic
Below is a picture of the schematic. If you want to make any modifications, see the program for details of changes already programmed in. Using the parts previously mentioned, build the circuit.
NOTE: Do not solder directly to the Atmega168 if you are not experienced. Instead, solder in the socket and then insert the Atmega168 into the socket.
If you are modifying the schematic and not using an input, be sure and solder it to ground. If you are not using an output, leave it disconnected.