WATER LEVEL INDICATOR WITH ALARM

WATER LEVEL INDICATOR WITH ALARM

The heart of the circuit is the transistors BC 547. There are add up to 7 transistors in the circuit and every one will be detecting the level of water present in the overhead water tank. There is one additional power LED without a transistor and that is on account of this Red LED will be letting us know two things. Firstly when you control the unit it will be checking the source exhibit in the unit and furthermore it is additionally the marker letting you know that there is no water at all present in the tank. As in light of the fact that the water level is beneath the No. 1 (as demonstrated in the circuit) sensor, no LED's will be illuminating, yet just for the one Red LED. Hence when you switch on your unit if you see one Red LED illuminating then you realize that the is no water show in the tank and in this way you ought to make you water pump on. 

At that point as demonstrated in the figure i have given all the Driven's in different shading. Beginning from the earliest starting point is 

1. Red LED(Showing no water in the tank as none of the sensors are getting contact with the water) 

2. Red  LED ( Level 1, sign low water in the tank ) 

3. Yellow  LED (Level 2, sign of low water) 

4. Yellow  LED (Level 3, sign of 1/4 of water in the tank) 

5. Green  LED (Level 4, sign of a large portion of water in the tank) 

6. Green  LED (Level 5, sign of more than a large portion of water) 

7. Green  LED (Level 6, sign of nearing topping off the tank) 

8. Blue  LED (Level 7, Full sign of tank and bell goes ahead)

Presently as the water begins to ascend the sensors begins to get in contact with the water and the transistors are initiated and there is a stream of ebb and flow in the transistors making the LED's light up. Here in the middle of the transistor and the LED there is a present constraining resistor 470 ohms, the employment of the resistor is to watches that the LED does not get over voltage and devastate the LED. The transistor is one-sided by a 470K resistor with the ground and the detecting part is brought from the gatherer with a 33 ohms resistor setting off straightforwardly to the tank. As i have demonstrated in the chart the signs are attracted the Green shading. There by you can take after the LED's as they light up from Red to Yellow and afterward Green lastly to Blue making a sound.

The Ringer Part 

Here you can include any of the typical ringers that are promptly accessible in the business and in the event that it is not then you can make yourself with a straightforward 555 IC. I am giving a little circuit outline, it is truly easy to make and there are least parts. It is a basic sound oscillator. I have additionally give a circuit outline here however in the event that you have the capacity to deal with a bell then no compelling reason to gather this circuit.

The Power Supply 

This area contains a transformer changing over the mains voltage 220V cut down to 9V. There is a scaffold rectifier containing 4 diodes and making the Rotating current to Direct Current. After the separating the voltage is then specifically nourished to the voltage controller (7805) with a sifting capacitor. From the controller IC the yield voltage is on the other hand separated with a capacitor and is bolstered to the circuit. This includes the force supply of the gadget.

This finishes the electronic piece of the task and now i will be heading off to the sensor part, which is likewise made effectively

checked working circuit