Tagged: Alarms

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Door opening alarm circuit diagram

A door opening alarm circuit is an indicator or a security alert device which activates while opening the device attached door. And the alarm remains ON as long as the door is kept open....

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Infrared burglar alarm using IC 555 circuit diagram

This infrared burglar alarm can use at doors, entries, etc. To alerts us, when somebody crosses through the IR beam. As the IR beams are invisible to human eyes, the circuit can work as a hidden security device. To...

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Vibration sensor alarm project arduino

Vibration sensor circuit uses a Piezoelectric sensor or PZT transducer. A piezoelectric sensor works with the piezoelectric effect, which is the ability of certain materials to generate an electric charge in response to the applied physical stress....

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Vibration sensor alarm circuit diagram

The circuit can be used as an intrusion detector alarm which can be simply placed on doors, floors or any surface where any vibration or pressure is generated during any intrusive actions. This burglar alarm...

Arduino siren sound generator code 0

Arduino siren sound generator code

Here a simple Arduino code to generate a wailing audio tone. The code can be used to generate tones similar to a police siren, ambulance siren, warning sirens, etc. This circuit works using the tone function...