Conserving water by tuning water levels using microcontroller AVR
This is a simple project to control the level of water in an overhead tank. The peculiarity of this project is that it can detect up to 9 water levels when compared to the standard version of water level control.
- The sensing is done by using nine probes placed at 9 different locations of the tank.
- Level 0 denotes zero implying a waterless tank whereas level 8 implies that the tank is full.
- The probe that is common is put at the bottom of the tank.
- If the level of water reaches under minimum detectable level, The LCD displays level ‘0’ indicating emptiness whereas level 8 indicates full tank followed by a buzzer.
- The total number of transistors involved in this apparatus is 8.
- This project finds important applications in home electronic devices such as water cooler, where there is a danger of motor-burnout when no water exists in a radiator.
- Can alternatively also be used in indicating the fuel levels within a machine or device.
BASIC DIAGRAM FOR WATER LEVEL CONTROLLER
- A stable 5V power supply is fed to the microcontroller circuit.
- The given circuit has nine conducting probe indicators.
- The transistors are connected to PORTB of the microcontroller.
- Seven segment display is connected to PORTD of the variable
- The level 8 indicated by the full tank is shown on Seven segment display along with a buzzer sound.
3 MAJOR CONDITIONS:
CASE 1- WATERLESS
In this condition, microcontroller will be in active low implying that (0-2V) will be considered high whereas 3-5V will be considered low for the microcontroller.
- Since there is no conductive path between 8 indicating probes and the common probe transistor(BE)Base-emitter region will not have sufficient voltage to operate.
- Therefore it remains in the cut off region.
- The output from transistor becomes 4.2 V which is low by microcontroller hence it will show value 0 on Seven segment display.
CASE 2 – INTERMEDIATE LEVELS(Levels 3-7):
- Here the microcontroller acts as priority encoder mode which senses the bit input having the highest priority and then shows the matching water levels on the 7 segment display.
CASE 3 – FULL TANK:
- When the overhead tank is completely filled the microcontroller goes into the conduction state.
- The corresponding output is fed to the microcontroller.
- Therefore not only the water level ‘8” displayed on the seven segment but also the output voltage activated a buzzer device which then cuts off the water supply thereby saving water.
- Cheap maintenance cost
- Hassle-free installation
- More convenient to use
- Ergonomic design
- Reduces manpower
- Efficiently saves water
- Robust and compact
- Fully automatic
- Prevents seepage of roofs and walls by avoiding leakage of water
- No drying of pump and saves electricity.
WATER LEVEL PROJECT APPLICATIONS:
- In huge companies employing water tanks
- Commercial complexes