The circuit was designed to produce a circuit that will alarm a sleeping person to prevent snoring by using a vibrator instead of an audio alert so as not to affect the whole household. It contains a ...

The circuit will provide a beeping sound to alarm the household that the refrigerator door has been opened for more than 20 seconds. 4060 – a 14-bit ripple counter with internal oscillator that has ...

Accurate tower light monitoring is a serious matter, and great care can be taken to install a thorough and automatic monitoring system. Designing a system to provide a single-lamp failure can quickly ...

This miniature alarm unit protects your valuables from theft by sounding an alarm when somebody attempts to pick up your briefcase. It is a battery-operated gadget that can be hidden in a corner ...

A few simple components are all it takes to create an over-temperature alarm. The circuit in Figure 1 requires only an ordinary negative-temperature-coefficient (NTC) thermistor, two common ICs, and a ...

Environmental systems that precipitate dust and carbon particles frequently use high-voltage dc power supplies. However, failure of high-voltage components caused by a change in their properties over ...