Circuit schematics are the heart of any robotics or electronics project. Beginners may want to use these schematics exactly as described, while those who are more advanced may wish to modify and expand upon them.

A schematic is really just your roadmap or blueprint in building a complete project. Use the exact componts listed in the schematic if you want it to work as described...even though there is usually some "fudge factor" in the values of components, until you gain more experience just go with what is called for. Of course once the circuit is working, experiment a bit. Don't let the smoke out or it won't work any more! :)

A sample schematic: