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Time Delay Door Alarm image Zoom

Time Delay Door Alarm

This circuit alarms when you leave a door or window open such as an air-conditioned room, car door, etc.

Availability: In stock



  • Buy 10 for $11.65 each and save 11%
Product Description


    Power requirement : 9-12VDC.
    Consumption : 1.9uA (standby) @ 9VDC, 60mA (working) @ 9VDC.
    Duration of delay time before alarm : 10-60 seconds.
    The magnetic switch is included in this set.
    PCB dimensions : 2.81 x 1.84 in.

    9VDC point to be connected to power supply.
    S1 point to be connected to the magnetic switch.
    LED indication of circuit in operation.
    Jumper JP1 is used for selecting the mode of circuit operation.
    The circuit will operate with time delay when JP1 is connected.
    And if JP1 is disconnected, it will operate immediately.
    VR1 is used to set the delay time.
    VR2 is used to adjust the high tone of buzzer sound.
    VR3 is used to adjust the low tone of buzzer sound.

Additional Information

    Additional Information

    SKU MXA077
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