The circuit was designed to create an early warning alarm system against any form of theft that is significant to the owners of motorcycles or bikes. Mercury Switch – a switch constructed into a ...

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 ...

Use this refrigerator alarm circuit to prevent leaving the fridge door open by sending out an alarm signal every time the door is left open for some time. The sensor of the alarm is an LDR. After a ...

Article 760 covers the installation of wiring and equipment for fire alarm systems, including circuits controlled and powered by the fire alarm. Those circuits are for such things as fire detection ...

While there are a lot of similarities between fire alarms and security systems, it is crucial to be aware of the differences, and wiring is one of the biggest. Like security panels, fire alarm control ...

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 ...

Normally, the fire alarm initiating device, notification appliance and signaling line circuits are not run outside the building. When we have no choice but to run them overhead or underground, ...

Article 760 covers the installation of wiring and equipment for fire alarm systems. Residential smoke alarm systems, including interconnecting wiring, are not covered by Art. 760 because they are not ...

In this article, I describe the process I used to create a home automation system using off-the-shelf products, Python and Linux. I start by describing the Serial I/O Kit, drive alert, water alarm, ...