Water Level Indicator with Alarm — 3-Level LED & Buzzer Circuit (School Science Project)
A working water level indicator with alarm: probes in the tank light up LOW, MEDIUM and HIGH LEDs as the water rises, and a buzzer sounds when the tank is full — a simple, reliable circuit project that always works on exhibition day.
This project shows the water level in a tank at a glance and warns you before it overflows. As water touches each probe, the matching LED (low, medium, high / 25%, 50%, 75%, full) turns on, and a buzzer alarm sounds when the tank reaches full. It is a classic, dependable electronics circuit — great for younger students because the result is clear and it does not need any programming.
What is included
- Breadboard circuit with LOW / MEDIUM / HIGH (and full) LED indicators
- Buzzer alarm for the full level
- Water level probe wires
- 9V battery + connector
- Transistors, resistors and jumper wires
- Mounted, demonstration-ready project
Great for
- School science experiments and exhibitions
- Learning transistor switching, LEDs and simple alarms
- Water-tank, overflow and level-sensing demonstrations
- Younger students and no-coding electronics projects
What it teaches
How water conducts a small current, transistor switching, LED indication and buzzer alarms — a clean, practical introduction to electronics with a real-world use.
Why buy from Arduino Corner
Complete, tested project kits at the best prices in Pakistan — ideal for school science exhibitions and final year projects (FYP). Visit us: Arduino Corner, Shaheen Market, DAV College Road, Rawalpindi. We ship across Rawalpindi, Islamabad and all of Pakistan with cash on delivery.
