DIY Water Level Monitoring Circuit is good for tank or reservoir.
It use IC 555 timer in astable mode and make repeated signal.
When water reaches a set level then buzzer turns ON.
The circuit helps to stop water overflow and is useful in home, factory and farm.
Circuit Working:
Parts List:
| Component | Quantity |
|---|---|
| Resistors (All resistors are 1/4 watt unless specified) | |
| 1k | 1 |
| 100k | 1 |
| Capacitors | |
| Electrolytic 2.2µF 25V | 1 |
| Semiconductors | |
| IC 555 Timer | 1 |
| Buzzer 3V | 1 |
| Battery 3V | 1 |
| Probes Insulated Copper Wires | 2 |
Circuit works with 3V and uses IC 555 in astable mode.
Two copper probes A and B act as water sensor.
When water touches both probes then the circuit is complete.
555 IC make signal and buzzer gives alarm.
Probes place at wanted water level in tank.
Water connect probes and current flow between A and B.
R1, R2 and C1 set 555 timing and signal speed.
IC 555 give fast ON/OFF at pin 3 and buzzer sound an alarm.
Alarm work while water touches the probes.
When water goes down then there is no connection and alarm stop.
Formulas with Calculations:
DIY Water Level Circuit with simple calculations:
This circuit works in astable mode and its frequency is found by:
Frequency (f):
f = 1.44 / ((R1 + 2R2) × C1)
where,
- R1 is 1kΩ
- R2 is 100kΩ
- C1 is 2.2µF
How to Build:
To build a DIY Water Level Monitoring Circuit following steps are needed for connections in the circuit:
- Gather all the parts as shown in circuit diagram
- Pin 1 of IC1 connects to GND
- Pin 2 connect to pin 6
- Pin 3 goes to one side of buzzer and other side of buzzer connects to +3V
- Pin 4 and pin 8 connects to +3V
- C1 positive connects to pin 2 and C1 negative connects to GND
- R2 connects to between in 6 and pin 7
- R1 one side goes to pin 7 and other side goes to probe B
- Probe A goes to +3V
- Battery positive goes to circuit positive and Battery negative connects to GND
Conclusion:
This DIY Water Level Monitoring Circuit is cheap and smart project.
It uses IC 555 in astable mode to make square wave.
When water touches the probes the buzzer makes sound.
The circuit is good for home, farm or at factory use.
It is with low power and easy to build.