| Have you seen the movie "Mission Impossible” with Tom Cruise? Would you like to know how to catch him with a $40 sensor? Try building a high...
All items tagged with Sensors and Alarm (4)
| Just add a few external components to a standard low-cost smoke alarm and turn it into a universal alarm sounder. You can easily hook up the...
| This alarm system uses two PIC16F84 processors and is relatively easy to build and install. The cost is very low compared to ready-made syst...
| In this somewhat unusual digital voltmeter, the measurand (voltage to be measured) is digitized in an analogue-todigital (A-O) converter...