Build and Test Your Timer
Schematics and Building the Circuits
Not only does this activity provide another useful application for your WAM Kit, but it is also a great lesson on optimizing your breadboard real estate. There are a lot of components to fit onto the board, so we need to make the most of the space available. Figure 1 shows the schematic for this mini timer.
If you have difficulties assembling the timer, check this Parallax forum thread for more help.