Buzzer Water Level
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgadX1xjTTaaMBEtqXxd1SDx00TOz01XjmC9MO4SCJ8628V6Bq791JwR9sOUBDx4gRq00NAyNOUIAIjkqvRxD61jvW1xTRkemiFfrawFa6faT4rzdsyaNo5WmDJOnUzzuDpQK_XtcFKk0iC/s400/waterlevel1.jpg)
Schematic
Original Source : Tektronico
If you want to control the level of a water tank instead of connecting the V + and the collector of the transistor (Q2) at the buzzer is connected directly to a solenoid valve. And so every time you make contact electrodes by closing the valve.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgadX1xjTTaaMBEtqXxd1SDx00TOz01XjmC9MO4SCJ8628V6Bq791JwR9sOUBDx4gRq00NAyNOUIAIjkqvRxD61jvW1xTRkemiFfrawFa6faT4rzdsyaNo5WmDJOnUzzuDpQK_XtcFKk0iC/s400/waterlevel1.jpg)
Schematic
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHt7didsXNGU_Ckl_BywTdTcG5AVbTSFBKd4HtBoiuxYeeZxfABRUEK2Gd5ljZd1ImrCalLUM9xR-llpw2DLkXnsI7fAv9rCfrRvG5B-NNDZ5w1jU8r8FgqbA8SPHbO_UHjc8_5-04Yk9T/s400/waterlevel2.png)
nice share
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