When the power is on, you can turn Inputs on and off manually by clicking on them. An Output represents a value computed by the circuit. The values of Outputs cannot be set manually. You might want to use Tacks to help make your circuits neater. Once some components have been dragged onto the circuit board, you can draw wires to connect them.
Every wire leads from a source to a destination .
To draw a wire, you have to click the mouse first on the source. Then hold the mouse button down while you move the mouse to the destination. When you release the mouse button, the wire will be added to the circuit. If you release the mouse button when the mouse is not over a valid destination, no wire will be drawn. Circuit Inputs are valid sources for wires.