Here is a simple freezer alarm circuit, but ultra sensitive with a buzzer. The circuit raises an audio alert when the temperature inside the freezer box goes up above a preset level. The circuit ...

This top-rated alarm clock not only has an extra-loud buzzer and a vibrating bed-shaker—it also has a cool, handy feature that projects the time onto the ceiling, making it easy to see what time ...

There’s a snooze button, and you can choose to wake up to an alarm buzzer, gradual volume crescendo, music from your iPhone, or one of 20 available FM radio presets (yes, it has a built-in radio).

CUI Devices has announced a line of medical buzzers compliant with IEC 60601-1-8 alarm signal requirements. There are four CPIM-4410-80x buzzers, with a letter replacing the ‘x’ depending on function: ...

AutomationDirect has added Stahl hazardous location alarm buzzers to their lineup of control and indicating devices. The STAHL YA11 series signal alarms sound an audible warning, alert, or information ...

A PIC18F1220 micro controller sits at the center of the alarm and handles the majority of its functions. It takes input from the laser detection circuit, triggers the buzzer, as well as arms and ...

An innovative technology that turns inexpensive door bells or smoke alarm buzzers into air quality monitors has received recognition from England's Institute of Physics (IOP). The Technology ...