Water Sensor Alarm Circuit

Posted on Feb 4, 2014

This small water sensor alarm circuit makes a loud warning sound when a humidity sensor detects a quantity of water. This circuit assembly is an application of low power comparator LM1801 made by National Semiconductor. The reference voltage for the integrated circuit is fixed with the help of R2. When pin 4 of the LM1801 voltage exceeds preset th

Water Sensor Alarm Circuit
Click here to download the full size of the above Circuit.

reshold, because the moisture sensor noticed a smaller or larger chip will command the active piezoelectric buzzer with a current of over 24 mA. In the surveillance state, the water sensor alarm circuit has a current consumption of 10 microAmps so you can use a 9V battery for almost one year. We can connect many sensors simultaneously.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Keypad Combination Lock circuit
    Telephone Auto Record
    Voltage-To-Frequency Converter I
    Digital Altimeter Circuit
    Bowling Game
    Sense Small Inductance Changes Over A Wide Range
    pcb How to use the same switch to control LED and vary resistance
    Common Collector Colpitts Oscillator
    A DC Fault Protection Circuit for Audio Amplifiers
    PSPICE Examples for EE-201