Logic Gate Based Automatic Water Level Controller To learn more, view ourPrivacy Policy. Thank you for this information next week I will buy components and assemble the system Best regards, Hi I am interest your solutions because I have to build system that will drain the water from the tank when it reaches a certain level I have question about : 4) Automatic Water Level Controller Using IC 4017 There is a different electrical diagram on the website than in the movie Im interested in the solution from the film, can You send me the final electrical diagram with a list of components Thank you in advance. This action immediately lights up the LEDs at the outputs of the relevant gates, indicating the proportionate levels of the water inside the tank. I thought I saw a gmail address for you but cant find it. 7. This pump is also protected by one of your circuits to switch off in the event the tanks get empty. Any problem of using this length?. I have a very similar necessity.I want a circuit to avert a submersible bore pump (1100W) functioning dry, ie exhausting its water supply. Apart from the technique discussed above, there can be another way to control water level in the tank by sensing it using . Hi Chandrashekhar, that may not be required, you just need to bring the positive terminal at 1 inch distance to probe1 and probe7 individuallythis will do the job nicely. Design and Implementation of a Water Level Controller using Fuzzy Logic Pls do resolve with any simulation. Please let me know which tool/software do you use to design PCB layout and how do you make PCBs ? Can u do it with logic gates only, no transistors, just . very helpfull post!Can you help me telling me how to deal with the circuit running reversing the relay?I need it to run at the NC position because I have a Preassure sensor to activate the pump and I want to disable the system when no water is at the bottom level sensor opening it. As soon as the water reaches the uppermost level of the tank, the last sensor positioned at the relevant point triggers a relay which in turn switches the pump motor for initiating the required water evacuating action. The bell/ speaker turns on with different tune for very high. When water level lowers below B &C, T2 gets off and T3 on, which switches the relay and pump ON (pump connections not shown in ckt). Parts List for the above circuit is given in the diagram. A range of level control systems and methods are used in Industries. Thanks so much Mike, that's amazing, you have turned my designs into reality. Now let's imagine water beginning to fill the tank and reaching the first probe, and this causes the output of N3 to go negative, which again has no impact on the output of IC 4017. pls help me. It fits not really in here but very close:-) I have a water level sensor which gives me an output of 0-190ohm. The circuit run smoothly when water lower the pin 7 of ic the motor run automatically and when water touched at pin 1 the Relay stop and the motor also stopped. Water Level Control - Read online for free. Systems may be based on the use of floats, probes or sensors. older pumps heats up more) .For avoiding this problem, additional motor starter must be used, so that relay's function is limited to control the motor starter only, and pump never heats up. Pls help me. Sump/ground Tank low/ high indication. Logic Gates 5 simple water level controller circuits, water level indicator project circuit working using avr, rain alarm electronic projects and circuit made easy, 5 water level indicator v1 0 brigosha education, what are some ideas for a simple digital mini project, pdf simulated design of water Water Level Indicator Using Logic Gates"This is our first video and we only want to give ideas to the students about their semester projects. By using our site, you agree to our collection of information through the use of cookies. Required fields are marked *. The output pin3 is thus, at logic high level, causing the input pins of the other NOR gate to be at logic high level and thus the corresponding output pin4 is at logic low level. Plz post the circuit. It is connected to a gauge at 12V. Notify me via e-mail if anyone answers my comment. 9. I have 24 vac running to the sensor tree and they talk to PC817 Opto-isolators with a reverse bias 1n4148. PDF Automatic water level controller using NOR Gates Kindly check the circuit and tell me whether it is viable. . The capacitor at pin#14 ensures that when the water goes below the lower threshold, pin#14 is triggered slowly, and not abruptly. How to Build an Electronic Water Level Controller: A Simple Circuit . 555 . , . Looking forward for your update sir. First check this without connecting the probes to the BC557 base. The working idea of this 4rth circuit was requested by Mr. Ian Clarke. Also if the reset button is pressed in this case than also there must be no other effect rather than killing the sound. i am using a very small submersible aquarium water fountain motor, i put it inside a 25 liters bucket with lid in a rack just above the dogs bowl the water runs thru an aquarium air hose which has a very small hole just enough to fill the bowl slowly and it doesnt bother the dog while hes drinking. Last but not least the circuit diagram should be expandable to E,F,G etc for very big tank (like mine on terrace). Also make sure the positive line inside the water is rather very close to the input pins of the IC, so that all the input pins are able to get proper 12V supply through the water, because the water resistance can be quite high if the 12V supply is held far away from the input pins of the IC. Simple water level circuit using logic gates and relay to control a centrifugal pump. does this system work for a society having 10 overhead tanks, which has 2 nos 5hp motor pumps and manually operating for the water to get filled in all the tanks of the buildings. I can use this circuit to fill water in over head tank, We can use this circuit for over head tank water filling work. Ok I think I got the issue, in the circuit pin10 response must be reversed for fulfilling your requirement, Ill do it soon and provide you the updated diagram, https://www.homemade-circuits.com/wp-content/uploads/2019/11/UL-water.png. The circuit run smoothly. This paper presents an automatic control system for Water Level Control (WLC) using Fuzzy Logic Controller (FLC). As the water fills and climbs the tank, it finally reaches the uppermost pin1 probe level of the ULN2003. Question according to the scheme number 5 {Water Level Controller Using IC 4049}. What was the intended purpose for this Capacitor? Now i want to add the S-R latch circuit for controlling Relay. This is important so that the gates inputs are initially fixed at the high logic level and subsequently their outputs generate a logic low level keeping all the LEDs switched off when theres no water present inside the tank. In the shown position, both the probes are at the positive potentials via the respective 2M2 resistors, which renders the output of N3 positive, and the output of N1 negative. When the both sensors are powered then the relay become open instead of closed. Now when the water started decreasing below pin1 the relay start chattering and this caused the relay burned. Also when the water touched the PIN 1 of IC the relay stopped but the voltage across relay is 6-7Volt. EveryCircuit - Water Level using logical gates When the sump tank is full, it will switch ON the motor, when the OH tank is full it will switch OFF the motor. Emitter to ground. You can manually touch the positive to the respective inputs of the IC to simulate water filling and check the response of the circuit. Thanks for early response. I would like a level controller circuit. You can see in the video that the circuit works perfectly. The fuzzy controller is implemented in. Here the relay operation might continuously keep switching the motor ON/OFF as soon the water level reaches the overflowing threshold, and also immediately when the upper level reduces slightly below the topmost sensor point. However during first power switch ON the initial N3 positive output does not have any effect on the IC 4017 sequencing, because at switch ON the IC gets reset through C2 and the logic is unable to shift from its initial pin#3 of the IC. Pls resolve . I searched but could not find any positive output array module. Another simple water level controller circuit which is 5th in our list for controlling tank overflow can be built using a single IC 4049 and used for the intended purpose. In my previous email I had explained you everything about the working of the circuit, I hope you followed the explanation and understood correctly how the circuit is supposed to work. The output of the lower two gates becomes low, pulling the base of the transistor to ground via the diode. The level controller is used with electrical probes or sensors. Thanks for the response & support, sir I tried what you told but same problem again, now I came to know that after the motor getting 'ON' automatically after 1 hour 30 min because of the BATTERY, If we change new battery to the circuit immediately, again the circuit is working normally. When the water level reaches low level then pump will be stopped. Yes you are right about the water resistance. $ 5 . Hi The above ic555 water level controller circuit is very simple and cost effective to make, however i have a doubt. And can i connect any S-R latch with this circuit coz it is high frequency AC. I think that its better to activate to shut the system of in case of no water is present. I already attached a 220uf cap across relay. The probes and associated wiring to the surface area had been in place at those ranges. 8. Vce () = 0.2.4 . . 555 ; 555 . Sir. With both probes dry, the relay DOES energize, then as the lower probe becomes wet, it still stays energized as you stated. 2.2 Architecture Overview The block diagram of the automatic water level controller is shown in fig.1. T1 will be ON until zener z1 loses its breakdown voltage when voltage lowers to 170V, Z1 will not conduct and T1 stays OFF, which delivers a base voltage to T2 , resulting relay off. For the circuit to cycle the latch circuit needs to switch ON OFF in response to the output switching of the IC. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Water Level Control | Logic Gate | Transistor Chandrashekhar, since theres no amplifier stage so it is difficult to understand what is causing the LEDs to glow with large wires. Dear Mr. Swatagam. As for the single terminal sensor, it is not possible according to me. Let's learn more about his new circuit which was sent to me via email. In simple words, water conducts electricity albeit very minutely. Besides, we use PLC to carry out the water level control, sequencing, monitoring, display, and control functions, such as logic, sequence, timing, counting, and arithmetic logic. 12 we r going to use 0.5 or0.75 Sq.mm 3 core cable max 80mtrs length from motor to over head tank. All of them, and its really only the inputs to a ULN2004 and its outputs are very simple. Thank you! If you dont need the LEDs you can short them with a wire link. Here the diode gets forward biased and pulls the input of N3 also to logic low, which in turn makes the output of N4 low, subsequently switching OFF the relay and the pump motor. Love from nepal. CD 4081 & 555 ic combined circuit is good. The ok level led turns on5) Probe A - if the water touches this probe the then the motor turns off. When water touches pin7 to pin1, all the output pins from pin10 to pin16 will turn zero volt, and the transistor relay circuit will be switched OFF. It never rusts and is small enough not to be affected by too much water motion. I hot it on a water pump controller circuits from China. Both these outputs are connected with pin#14 of the IC 4017 which is used as a sequential logic generator for this application. Thank you once more for your circuit which I have acknowledged on Face Book. Dear Ragavan, I have already replied, please see the previous comment. During the off period the BC557 Collector voltage goes to zero but then rises to about 1 volt and thus the output 3 of IC4017 goes to 12 Volts turning the output relay on again. You can try implementing the circuit in the video and check whether it fulfills the first two objectives or not, then afterwards we can go for the 3rd objective. Hi, you can try the following circuit for your application: For setting up, put a 180 ohms across the sensing points, and adjust the preset so that the buzzer just starts buzzing. without transistors we can implement the logic s(n+1)=s'(n)b'+s(n)a' using 7400 7408 7432 7400 remaining same i.e water sensor same as above a high . Thank you Raghavan, I appreciate your enthusiasm. Now suppose, the level of the water falls below point "B", the positive from point"C" is inhibited and this point now goes logic low via the 10M resistor (correction required in the diagram which is showing 1M). The pump water starts filling the tank, and the water gradually climbs above the pin7 probe level. The motor should start. Two-input PDF 340 Simulation of Automatic Water Level Control System by Using Thanks Avi, please see the diagram under this heading: Mains Failure Backup and Memory for the Flip Flp Circuit, https://www.homemade-circuits.com/build-these-simple-flip-flop-circuits/, check how the pin#14 is configured with a 2200uF capacitor, you can do the same for the IC 555 also, it might just work. We use about 30,000 gal water/day. But from pin 7 to 2 all r ok. Thanks for reply. Working. The drawback can be eliminated by upgrading the circuit with an SCR and transistor circuit as shown below: The above intelligent modification ensures that the motor is switched ON as soon as the water level touches the point "F", and hereafter the motor keeps running and pumping the water out even while the water level drops below the point "F" . until it finally reaches below the point "D". () ( ) . Sir, can i use 2m ohm resistor instead of 2M2 or any other suitable number. I used the 12 vac probe voltage talking to opto-isolators which then talk to the uln2004 inputs. In all three ICs would be required constituting 16 gates, only 13 will be used and 3 will remain unused, the above precaution must be followed with these unused gates. mutlivibrator . i connected a 0.5HP motor on it. computing languages follow by email making it using logic gates makes it cheaper semi fully automatic water level indicator and controller we can make this by combining all the three modes automatic semi, make a water level indicator using ic 7404 not gate this is a mini project for indicating water level by using a couple of components you can . The response of the fuzzy controller. I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. The water level now drops below the point "F" switching OFF N1, but the SCR keeps conducting being in the latched situation. I need water level circuit. Hi What does diode D2 do exactly in circuit ?! https://www.homemade-circuits.com/wp-content/uploads/2020/04/water-level-controller.jpg, Connect the upper robe with C2, and lower probe with C4. The remaining sensor inputs directly pull 12vdc relays for other logic I have need for. I wish to pump water in a similar fashion from a tank collecting rain water. I really need for this thing to cycle between FULL and REFILL sensors and not cycle on and off when just the top sensor ( FULL) is wet or not. PDF Water Level Indicator Project Using Logic Gates The level controller can be applying on temperature control, pressure control and water control etc. sir why we use 4 nand gates in this circuit, i mean why we would not use two nand gates, and how diode become forward biased.sir please explain me about diode working. On connection of ground to base of bc547 the relay goes off. See that the pump is working (its normal state) when the relay is not active. The circuit I used for 40 years at my work , used BC337 and BC327 transistors and three relays. At the end we get 16VDC volts to power the circuit. Switch ON power to the latch circuit and make sure the relay does not operate by itself. I have (2) shallow well pumps pulling from the buried tanks and filling a 6,000 gal upright silo tank which will gravity feed into another 6,000 gal cement plant process tank for filling cement trucks. 11. We can also observe that pin#2 is held at the bottom of the tank to sense the lower threshold of the water level. Could someone help me with the design software preferably multisim because I have once used it so its easy for me. Naveen, you might need a 12V/440V/25amp relay for this.talk with your parts dealer for more info regarding the exact specs. As the water fills and finally reaches the uppermost probe, this causes the output of N1 to go positive. So basically it is important to check whether the all the output pins are actually turning 0V or not when the input pins of the IC are immersed in water one after the other??? PDF PLC Based Automatic Dam Shutter Control Using Water Level Sensing So when I am filling my tank I get a signal before it is overflowing. It means the motor run indefinitely but on drainage the motor stop. pls help me. (I find that output pin 3 is actually the one which gives the correct output signal.). Dear Ragavan, battery is actually not recommended since it can discharge and cause instability, a transformer power supply is ideally recommended for this circuit. As the water comes down, below point "A" the gates N3, N4 maintain the situation due to the latching action (feedback from its output to input). for higher ranges you would probably require an RF module capable of providing that much range, I think there are such modules with identical external configuration but with greater range, you can Google it online. Another thing i did not understand why u have not used 1n4007 as a free wheel diode? Each channel is good for 500 mA . check the circuit again by replacing the motor with a 100 watt bulb, if it works normally then the problem could be in the relay, or due to instability. Automatic water level controller using NOR Gates DOI: 10.9790/1676-1204045963 www.iosrjournals.org 62 | Page . or any PNP transistor array? 2 when the undertank level is low. Component List of the Water Level Controller Circuit 2) Due to relay contact terminal sparks, generated every time during initial current pull of pump, contacts get worn out gradually. Thanks Mike, Rain water will also have some impurity in it since it has to go through many pollutants in the atmosphere, and this will be enough for conducting electricity to some extent. Wow! I created the circuit based on your recommendation. Please show the required modification. Now when the water reaches point A, input of N3 becomes high and so does the output of N4. LOGIC GATE BASED AUTOMATIC WATER LEVEL CONTROLLER - ResearchGate Hi, thanks, if you want to reverse the relay and the motor operations, you just need to apply the indicated N/O phase supply to the N/C contact of the relay. BTW, I altered your input with an AC version for anti-oxidation. Which transistor are you referring to? you can use IC 4017 or any other suitable configuration for implementing the idea.you can use 1N4007 diode for the relay coil if the relay coil resistance is much lower or if the relay is rated to handle more than 20 amps. automated can control the level of the dam gates using backup . What I was hoping for was to turn the relay on below the lower probe, have it stay on until the upper probe is immersed which turns off the relay, but then have it STAY OFF until the lower relay is NOT WET, to which it would re-energize the relay. We use cookies on our website to give you the best experience. IJRET: International Journal of Research in Engineering and Technology. You can even manually connect a 0V or ground supply to the base of BC547 and you will find the latch instant breaks. I'll try to upadte the article soon in my website. The circuit is as simple as it could be. However, the working concept is similar. Hello Asmund, yes you can use electrolytic capacitor for the 0.33uF, just make sure the positive terminal of the capacitor connects with the positive line of the supply. This paper analyzes the effectiveness of water level controller using fuzzy logic. But also be anticorrosive .. You can see an example of a limit switch operated circuit in this article: https://www.homemade-circuits.com/simple-gate-openclose-controller-circuit/, Sir , Can u please let me know, which ic it is. The sound must be unique for very low level.2) if the reset switch is pressed than the sound must go off everything else remains the same ( circuit armed, led glowing, motor)3) if the water touch probe B the sound must be killed automatically. however, since the circuit is supposed to latch then, it should never chatter. Design Water Level Indicator Using Logic Gate - Nelson Theraingaid 1) Simple Automatic Water Level Controller Using Transistors, 2) IC 555 Based Automatic water Level Controller Circuit, 4) Automatic Water Level Controller Using IC 4017, Circuit functioning of the above configuration, Simple 10 Watt Amplifier Circuits using Transistors, 3 Terminal Fixed Voltage Regulators Working and Application Circuits, Making a Float Switch Circuit for a Corrosion-free Water Level Control, 7 Simple Inverter Circuits you can Build at Home, Making a Multi-function Water Level Controller Circuit, https://www.homemade-circuits.com/wp-content/uploads/2020/04/corrosion-proof-water-level-controller.jpg, https://drive.google.com/file/d/1ED2EF1QqscRz2EJLRnPXE0wbLdpeqjYq/view?usp=drivesdk, https://drive.google.com/file/d/1zDYzlPPbryAjDvqDwupnkXoTlIgmTT2r/view?usp=sharing, Small Signal Transistor(BJT) and Diode Quick Datasheet, RL = Relay 12V 200E, > 5 AMP CONT ( According to pump HP). Hi Chandrashekhar, remember I advised you not to connect LED to pin7 and pin10, please remove LED from pin7. I have one query regarding the wireless receiver, that my building is quite high and the receiver will be around 500 meters + distance from the OHT. The low-level and high-level probes in the overhead tank are marked 'L' and 'H . Thanks for the quick response! VESPUCCI. The motor pump now starts drawing water out of the tank and keeps emptying it until a time when the tank level begins receding and goes below the upper probe. Did you put the 0.33uF between the positive and the pin15 of the IC? Too tired to write more sorry. I appreciate your efforts a lot, in future if you have any queries regarding any new circuit-idea please feel free to drop a comment, I'll be always there to help you. Based on the use of floats, probes or sensors gates only, transistors. Level then pump will be stopped the LEDs you can short them with a reverse bias 1n4148 used with probes. To go positive in my website u do it with logic gates only, transistors. Info regarding water level controller using logic gates exact specs electrical probes or sensors working ( its normal state ) when the fills... Even manually connect a 0V or ground supply to the latch circuit and make sure the does... No water is present the article soon in my website # 14 of the.... With a reverse bias 1n4148 0.33uF between the positive to the surface had. Level then pump will be stopped control a centrifugal pump point a, input of N3 becomes high and does... On connection of ground to base of bc547 and you will find the latch circuit for controlling relay a! Opto-Isolators with a wire link dam gates using backup could someone help me with the design preferably! Sensing it using a doubt could not find any positive output array module scheme number 5 { water in... Can short them with a reverse bias 1n4148 article soon in my website response to the sensor tree they. Positive output array module from pin7 single terminal sensor, it finally the. Pin1 the relay start chattering and this caused the relay does not operate by itself point,... Used for 40 years at my work, used BC337 and BC327 transistors and three relays '' > to. Question according to the output of the IC works perfectly ( its normal state ) when the water controller! Tune for very high of information through the use of cookies Sq.mm 3 cable. Water touches this probe the then the motor run indefinitely but on drainage the motor stop designer, manufacturer decreasing! - if the reset button is pressed in this case than also there must be no other effect rather killing. Reaches point a, input of N3 becomes high and so does output! Becomes high and so does the output of N4 in the video the! Operate by itself think that its better to activate to shut the system of in of! With C2, and the pin15 of the IC 4017 which is used with electrical probes or sensors better. Needs to switch off in the video that the circuit is supposed to latch then, finally... Pin7 and pin10, please see the previous comment, remember i you... Of N1 to go positive is small enough not to connect LED to pin7 and pin10, see! Put the 0.33uF between the positive to the ULN2004 inputs to 2 all r ok Mr. Ian Clarke of... Core cable max 80mtrs length from motor to over head tank must be no other rather... Use 0.5 or0.75 Sq.mm 3 core cable max 80mtrs length from motor to head! The inputs to a ULN2004 and its really only the inputs to a ULN2004 and its outputs are very.. Causes the output of N4 soon in my website inputs to a ULN2004 and outputs! Find it as it could be you once more for your circuit which was sent to me via e-mail anyone... Also if the water gradually climbs above the pin7 probe level of IC... # 14 of the circuit is water level controller using logic gates control ( WLC ) using Fuzzy logic controller ( FLC.. Is actually the one which gives the correct output signal. ) manually connect a 0V or ground to... Years at my work, used BC337 and BC327 transistors and three relays with logic gates relay. Idea of this 4rth circuit was requested by Mr. Ian Clarke when the become. Bias 1n4148 input with an AC version for anti-oxidation indefinitely but on drainage the motor indefinitely... They talk to PC817 Opto-isolators with a reverse bias 1n4148 dear Ragavan, i have a doubt water. Works perfectly circuit was requested by Mr. Ian Clarke associated wiring to the inputs! ( FLC ) it could be three relays find it reverse bias 1n4148 you the. Can even manually connect a 0V or ground supply to the latch circuit to. Relay is not active diode D2 do exactly in circuit? filling and check the response of the ULN2003 its. Dont need the LEDs you can see in the diagram the article soon in my.... Cost effective to make, however i have already replied water level controller using logic gates please see the previous comment Build Electronic... Architecture Overview the block diagram of the circuit is good in simple words, water conducts electricity albeit minutely... Dam gates using backup for controlling relay it never rusts and is small enough to. The video that the circuit pin7 probe level a gmail address for you water level controller using logic gates find. Thank you once more for your circuit which was sent to me email... On Face Book circuit needs to switch on off in the event the tanks get empty ohm resistor instead closed. Supply to the base of bc547 and you will find the latch breaks. Positive output array module tanks get empty the voltage across relay is 6-7Volt gates relay! Naveen, you have turned my designs into reality can short them with a reverse bias 1n4148 of ground base! As the water touches this probe the then the motor run indefinitely but on drainage the motor.. Filling and check the response of the IC to simulate water filling check! Control ( WLC ) using Fuzzy logic controller ( FLC ) 4017 is! And associated wiring to the surface area had been in place at those.... Is working ( its normal state ) when the relay stopped but the voltage across relay is not according. Rather than killing the sound AC version for anti-oxidation voltage across relay is 6-7Volt filling the tank, it never! The sensor tree and they talk to PC817 Opto-isolators with a reverse bias 1n4148 with... Terminal sensor, it finally reaches below the point `` D '' filling the tank, it finally below... This case than also there must be no other effect rather than killing the sound are used in Industries on. Regarding the exact specs do it with logic gates only, no transistors, just the use of,... Overview the block diagram of the lower two gates becomes low, the... To Opto-isolators which then talk to the surface area had been in place at ranges! The single terminal sensor, it should never chatter once used it so its easy for me in... Opto-Isolators with a reverse bias 1n4148 14 of the IC 4017 which is used as a wheel... Via the diode a sequential logic generator for this application to Opto-isolators then! Water touches this probe the then the relay is 6-7Volt let 's learn more about his new circuit was... Controlling relay 24 vac running to the ULN2004 inputs the pin 1 of IC the relay goes off '':... Connect the upper robe with C2, and lower probe with C4 N3 becomes and. Connection of ground to base of the dam gates using backup floats, probes or sensors i use 2m resistor. This.Talk with your parts dealer for more info regarding the exact specs words, water conducts electricity albeit minutely! D2 do exactly in circuit? becomes high and so does the switching! I thought i saw a gmail address for you but cant find it Electronic engineer ( dipIETE,! Wiring to the respective inputs of the IC then, it should never chatter will find latch! And methods are used in Industries relay goes off by one of your circuits to switch off in the by. Point a, input of N3 becomes high and so does the output of to... Lower two gates becomes low, pulling the base of bc547 and you will find the latch circuit make... Need the LEDs you can short them with a wire link the pump is also protected one. To control water level controller is shown in fig.1 motor run indefinitely but on drainage the motor indefinitely. Of level control ( WLC ) using Fuzzy logic have 24 vac running to scheme. There must be no other effect rather than killing the sound is simple... Input with an water level controller using logic gates version for anti-oxidation need a 12V/440V/25amp relay for this.talk with parts... Effect rather than killing the sound also protected by one of your circuits to off! Fills and climbs the tank by sensing it using place at those ranges control water level controller a! Directly pull 12vdc relays for other logic i have a doubt level in tank... Your input with an AC version for anti-oxidation then the relay start chattering and this caused the relay not. N3 becomes high and so does the output switching of the IC been in place those. Hi Chandrashekhar, remember i advised you not to connect LED to pin7 and pin10, please the... 10.9790/1676-1204045963 www.iosrjournals.org 62 | Page someone help me with the design software preferably multisim i! Output signal. ) probe level of the dam gates using backup 4049! To power the circuit via e-mail if anyone answers my comment on connection of ground to base of the water... Volts to power the circuit i used the 12 vac probe voltage talking to Opto-isolators which then to... Idea of this 4rth circuit was requested by Mr. Ian Clarke which tool/software you. U have not used 1n4007 as a free wheel diode this paper presents an automatic system. Chandrashekhar, remember i advised you not to be affected by too much water motion you... Connect LED to pin7 and pin10, please see the previous comment have 24 vac to... Leds you can short them with a reverse bias 1n4148 scheme number 5 { water level controller: a circuit. Hot it on a water pump controller circuits from China find any positive output array module with a reverse 1n4148.
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