Liquid detector circuit diagram electronic project

Posted on Feb 6, 2014

This liquid detector circuit diagram is designed using common electronic components. The liquid detector may operate an active buzzer, to make a sound when is reached a certain level of water. Because water sensor and control circuit for buzzer are located on the same printed circuit board, indicator, together with 9 V battery and buzzer can be mo

Liquid detector circuit diagram electronic project
Click here to download the full size of the above Circuit.

unted in a compact case. When water reaches the sensor, the base of T1 is connected to the positive supply terminal. Therefore, T1 and T2 are open, so that buzzer BZ1, will be activated. Sensitivity reduction of the circuit can be done by increasing the value of R2.

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