How To Make Water Level Indicator With Overflow Alarm
In this video you will see how we make a water level indicator with very simple parts.
When the amount of water in the tank reaches 25%, the first LED lights up, when it reaches 50%, the second LED lights up, and when it reaches 75%, the third LED lights up.
When the tank is full and the amount of water in it reaches 100%, the buzzer sounds and gives an overflow alarm.
The schematic of this circuit is in the video.
Required components of water level indicator circuit with overflow alarm:
1- Four BC547 transistors
2- Three LEDs
3- Three 1 kilo ohm resistors
4- 9-12 volt buzzer
5- 9 volt battery and battery holder