Test your system in all possible ways that it might be used.
Demonstrations You Can Give
Build a demonstration board incorporating a farm or home layout, with pushbuttons or other controls and bells and buzzers appropriately located. Show and tell how the system would save time and energy.
Show and tell how some of these work, and their value: power-off alarm, freezer alarm, fire alarm, driveway alarm.
For More Information
Ask your power supplier or your nearest electrical supply house for catalogs or literature on various types of signal systems, or ask a dealer to show you equipment he has in stock.
