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it automatically shut downs water pump wen water tank is full

Components Required
Power supply (6v)
NE 555 timer IC
Resistors (100Ωx2, 10kΩ)
Relay (6V, 30A)
BC 548 transistor x2
1N4007 Diode

Step 1: 555 Ic

Automatic water level controller circuit is a simple engineering project. It can automatically switch ON and OFF the domestic water pump set depending on the tank water level. You can implement this motor driver circuit at your home or college using less costly components.

Step 2: Transistor


The main advantage of this water level controller circuit is that it automatically controls the water pump without any user interaction.
The heart of this pump controller circuit is a NE 555 IC; Here we have manipulated the flip flop inside the 555 timer IC. Our project consists of two water level sensors, one fixed at the top and other at the bottom. Working of this circuit is almost similar to a bi stable mutlivibrator.

Step 3: Sensor

low medium n high

Step 4: Wiring

Working of Automatic water tank level controller
We know the property of 555 timer IC, i.e. its output goes HIGH when voltage at the second pin(trigger pin) is less than 1/3 Vcc.
Also we can reset back the IC by applying a LOW voltage at the 4th pin (Reset pin).
In this project 3 wires are dipped in water tank. Let us define two water levels- Bottom (Low) level and Top (Up) level. One of the wire or probe is from Vcc.
The probe from bottom level is connected to the trigger (2nd) pin of 555 IC. So the voltage at 2nd pin is Vcc when it is covered by water.
When water level goes down, the 2nd pin gets disconnected(untouched) from water i.e. voltage at the trigger pin becomes less than Vcc. Then the output of 555 becomes high.
The output of 555 is fed to a BC548 transistor, it energizes the relay coil and the water pump set is turned ON.
While the water level rises, the top level probe is covered by water and the transistor becomes ON. Its collector voltage goes to Vce(sat) =0.2.
The low voltage at the 4th pin resets the IC. So the output of 555 becomes 0V. Hence the motor will turn OFF automatically.
For simple demonstration of this project you can use a DC motor directly at the output of 555 instead of relay.
For practical implementation, you must use a relay. Rating of relay is chosen according to the load (Motor). 32 Ampere relay is best suited for domestic applications.

Step 5: Circuit Diagram

circuit diagram


Working of Automatic water tank level controller
We know the property of 555 timer IC, i.e. its output goes HIGH when voltage at the second pin(trigger pin) is less than 1/3 Vcc.
Also we can reset back the IC by applying a LOW voltage at the 4th pin (Reset pin).
In this project 3 wires are dipped in water tank. Let us define two water levels- Bottom (Low) level and Top (Up) level. One of the wire or probe is from Vcc.
The probe from bottom level is connected to the trigger (2nd) pin of 555 IC. So the voltage at 2nd pin is Vcc when it is covered by water.
When water level goes down, the 2nd pin gets disconnected(untouched) from water i.e. voltage at the trigger pin becomes less than Vcc. Then the output of 555 becomes high.
The output of 555 is fed to a BC548 transistor, it energizes the relay coil and the water pump set is turned ON.
While the water level rises, the top level probe is covered by water and the transistor becomes ON. Its collector voltage goes to Vce(sat) =0.2.
The low voltage at the 4th pin resets the IC. So the output of 555 becomes 0V. Hence the motor will turn OFF automatically.
For simple demonstration of this project you can use a DC motor directly at the output of 555 instead of relay.
For practical implementation, you must use a relay. Rating of relay is chosen according to the load (Motor). 32 Ampere relay is best suited for domestic applications.

Step 6: PCB Layout

Step 7: Components Pin Out

Step 8:

<p>Dear friend,</p><p>Its a very nice concept. Please show a diagram where to connect VCC and water PUMP connection?</p><p>And please be noted that the Water Pump line will be 220 Volt. So how to connect that to this circuit.</p><p>Thnx</p>
The main reason for the relay is to serve as a switch. When you connect the output voltage of the timmer to the relay it delivers a dc voltage which creatr an induced current in the magnetic field of the relay and the relay will switch on the motor. The voltage of the motor can not destroy the circuit
<p>Could you possibly do a DRAWING for the front and back of the connections as this is fairly confusing even in the photo, many suttle things going on that cannot be definitively understood.</p><p>Also, can you show how you would connect it both to incoming current of 12V and connections to the storage container?</p>
<p>i need the circuit diagram </p>
<p>any videos</p>
<p>hello, can I see the full picture of this system please. i would to see how the relay is connected to the motor.</p>
<p>where is vcc is to be connected?????</p>
Sorry for my silly ques about vcc.actulyy at thy tum I hadn't read the whole post.now I have one doubt and its the last one.i don't know about relay at all.can u plz say a bit of its working....and have u used the ckt in ur home overhead tank.m thinking to make this.thank you
My dear author I don't get one thing here is that where is the power supply given to the ckt.please give more details about power supply.rest is described awesome.vcc will be give m mains I don't think so.so give focus on that.thank you man
<p>Hi Amukim ! I am new to the world of electronics and wish to make a similar circuit. Could u please help in suggesting a simple, cheapest, durable and an automated solution (with maximum safety) for prototyping the circuit below? Thank You !</p><p>I have two AC motors, one for storing water in underground tank and the other for filling up overhead tank.</p><p>I start storing water in the underground tank once it comes during designated timings on alternate days only and it takes 8-10 hrs for tank to fill completely.</p><p>Sometimes it even happens that pump for underground tank is left running (not knowingly) and the water supply from utility during the designated timings is over while filling up the tank. In this scenario, the motor uselessly runs, until someone physically see the the flow of water and then switches it off.</p><p>After I see that there is substantial amount of water present in the sump, then only i switch on the other motor to fill up overhead tank or it would burn down the motor. The tank fills up in 90mins, if it's completely empty. In this scenario too, one has to be there in time to switch off the motor once it has filled up completely to prevent overflow.</p><p>For this circuit, I would like to know the level of water using 5 LED indicators (EMPTY, 1/4, 1/2, 3/4, FULL) for both of my tanks.</p><p>More importantly, a manual switch in the circuit would be its plus point. So that if the circuit is malfunctioning, I would be able to connect the motors directly to mains.</p><p>Both are 2 HP motors and operate in 220V AC</p>
awesome, thanks! I like the explanation too, I'm new to all this, so having an explanation how it works helps me understand. Thanks
<p>my pleasure.... </p>
is it possible to get a wiring diagram? Interested in the possibilities with this
<p>i hope u like....it....</p>
<p>ok i'll post it</p>

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