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[Successful actual test] Water leakage detection alarm

Overview

CSDN link

Debugging method:

Power on the module and rotate the potentiometer to the end. At this time, the indicator light goes out.
Use tweezers or other items to short-circuit P4
Slowly rotate the potentiometer in reverse direction and observe the indicator light (it is not recommended to solder the buzzer first, otherwise your ears will go blind) until the indicator light flashes.

Instructions:

Connect the buzzer, place the probe at a location where water may overflow, and turn on the switch. If water overflows, the buzzer will alarm.

Note: C2 is the oscillation frequency adjustment capacitor, and the oscillation frequency is inversely proportional to the capacitor capacity. The video uses a 10μF capacitor, it is recommended to use a 100μF capacitor

Design Files

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Update:2025-06-19 14:19:23

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