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However the moment water goes below point B, the lower right gate reverts its output because now both its inputs are at logic low. The last gate which is responsible for initiating the motor pump has its input positioned right at the brim of the tank. We know that NOT gates are simple potential or logic inverters, meaning their output produces exactly the opposite potential to the one that’s applied to their input. When this happens, the N3 output turns positive, and this impacts the IC 4017 output which shifts from pin#2 to pin#4 where it is reset through pin#15 back to pin#3. Both these outputs are connected with pin#14 of the IC 4017 which is used as a sequential logic generator for this application. As the tank gets vacated, the position of water at some point of time goes below point A, however this does not affect N3 and N4 as they are latched, and the motor keeps running.
Mean circuit goes off when -ve to bc547base and goes on when +ve to 100k to bc547. The water pump begins pumping water out from the tank which results in emptying the tank gradually. The water level now drops below the point "F" switching OFF N1, but the SCR keeps conducting being in the latched situation. The above discussed circuit appears to have one serious drawback.
How To Make a Simple Water Level Indicator
Hi Chandrashekhar, the circuit will operate correctly only when you pour water in the tank with the probes immersed, otherwise it will not work. Please remove the LEDs from pin10 and pin16 it might interfere with the operations. Chandrashekhar, since there’s no amplifier stage so it is difficult to understand what is causing the LEDs to glow with large wires. You can try adding a 0.01uF or 0.1uF capacitor across pin5 and ground of the IC and see if that helps in any way, other than this I don’t see any other feasible option. Hi Chandrashekhar, in order to switch OFF the relay at high level, and switch ON at low level you will have to employ one of the circuits explained in the above article.
The LED will glow untill the water reaches the higher wire terminal, when the water reaches the higher level it turns off. When there is a three-phase motor to connect to a single-phase sector, there are several solutions. 1 bulb 3 switches diagram In this video we have shown you how to control a lamp and any load from three places.
Step 3 - Studying the Circuit Diagram.
These can make our life easier by controlling the electrical equipment and time. The time for which the opamp continues latched could be dependent upon adjusting the feedback resistor hooked up between the output and the input pins of the opamp. Swagatam, Thanks for your reply regarding the uln2003 circuit, but as per your circuit I am not getting my desired result. The functioning of pin 16 to switch off when tank is full is Ok with me and suits my requirement. If you’re looking for a DIY Wireless Water level controller, then here are a few useful ideas that will help you get started and keep the amount of water in the container within a particular range.
At my level intervals ( empty, 1/4, 1/2, 3/4, “re-fill”, Full ) I have the sensor as a tinned copper wire impaled thru plastic pipe and sealed PLUS I have the common “hot” with it about a 1/2” away. The 2004 IC works reliably from sensor inputs. However horn#1 can be switched OFF by pressing the lower PB, which reverts the latch made from the lower couple of gates N5, N6. The output of the lower two gates becomes low, pulling the base of the transistor to ground via the diode.
Using BC337 and BC327 transistors and three relays
About 20 years ago, a friend of mine came to me saying that he had to repair a customer’s water level control made out of electromechanical relays which was falling apart. He understood that the original control relied on conductivity of water. The customer didn’t want any type of float switch so he had to stick to the way it was meant to work. The entire assembly, along with the power supply, should be enclosed inside a good looking, sturdy plastic enclosure, allowing only the sensor wires and the mains cord coming out of the box. Sometimes if the water level is less in OH tank, Pump may switch ON. Put a layer of insulation tape on top of terminal blocks to avoid any contact of sensing cables with power terminal block.
This circuit can control the water pump up at the roof top, where we don't have any electrical wire. And when it rains, it's very difficult to go on the roof and connect the wire with the pump to make necessary connections. So by using this wireless water pump controller, we can easily manage our home watering as per our needs. In this project, we will build a wireless water level indicator with the pump on/off. This project can help you monitor the water level of your water tank or any other liquid in your tank. To do this, we will use a float sensor and an LCD, which displays the amount of liquid inside the tank.
Step 2: Set-up
Get a couple of one foot 24AWG segments of wire and strip the ends. Insert one wire's end into the terminal marked as "Ground", then insert the another wire into the terminal marked as "Pump level protection" leaving the other ends loose without touching one another. Water levels have been used for thousands of years. The ancient Egyptians used water levels to build the pyramids, and the Romans used them to construct their aqueducts.
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Please find the attached circuit for a very simple and cheap water level controller. This design is only a basic portion of my own marketed product having unsafe voltage cutoff, dry run cut off and LED & alarm indications and overall protection. To measure Water Level in a tank, you can use a wireless water level indicator.
And In the Circuit the "NC" of the medium level water sensor relay is connected to one pin of relay"C" and another pin of relay "C" is already Connected to (-) wire from battery. So, the relay gets proper power to turn on and as a result, the motor starts running when the tank is empty. Hi Chandrashekhar, please check the latch circuit separately to verify if the circuit is actually working OK. To do this disconnect the IC pins from the latch circuit. Switch ON power to the latch circuit and make sure the relay does not operate by itself.
So it is important for the inputs to get a proper 12V from the water, and it is important for the IC outputs to produce perfect zero voltage whenever the inputs are subjected to 12V supply from the water. The capacitor at pin#14 ensures that when the water goes below the lower threshold, pin#14 is triggered slowly, and not abruptly. This avoids bouncy effects and allows the output to sequence correctly.
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