Charger circuit failure alarm Designed to alert when there is open or disconnected Battery from charger…
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Door Knob Touch Alarm Circuit
Simple Door Knob Touch Alarm Circuit is constructed by using timer IC 555 and few easily available…
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PIR Burglar Alarm Circuit
PIR sensor (Passive Infrared sensor) widely used in motion detection applications and security based applications, the…
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Laser Security Alarm Circuit
We need safety and security for our valuable things, to protect our property simple and robust…
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Vibration Alarm Circuit using Timer IC 555
The simple and reliable Vibration Alarm Circuit using Timer IC 555 designed to produce buzzer sound,…
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Door Open Alarm Circuit using Reed switch
If you want to Protect some door from unwanted access then you can use this simple…
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Main Power Interruption Alarm
This main power interruption alarm circuit constructed with few simple components and…
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Remote alarm for smoke detector
This remote alarm for smoke detector circuit is an application note from…
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Configurable alarm with Multitone
This configurable alarm produces different types of tones. It can be selected by switches, this circuit…
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