I have a simple solution, assuming all bulbs own their circuit. You can
detect the voltage on a switch controlling a particular bulb. If there is
no voltage, then bulb is stolen or burn-out. Of course, you can detect it
with a PIC having ADC...


On Wed, 20 May 1998, Pedro Drummond wrote:

> That's it, I have to come up with a solution. On small airports, people
> steal light bulbs from the runway. How to prevent (detect) it ? And maybe
> detect burn-out bulbs as well ?
>
> Thanks in advance.
>
>
> Pedro.
>
>