email rhb57 -at- windstream.net

So after the Mage modification to the circuit I still have to wonder after searching for a "D106" SCR - what type/number "general purpose" SCR have those sucessful with this circuit used? All I need this for is to tell me when water is low by LED and possibly buzzer for the reservoir/bubbler of a vehicular hydrogen system. It uses water with an electrolyte so it's conductive (to the person wanting to know about soy oil - it probably wont work as I think soy oil is not conductive). Your words of wisdom pertaining to what SCR to use and how that works with the modified circuit with R4 as 30k will be appreciated. Email me if possible.

Yeah I made it and it works cool.But you should follow the link for right circuit diagram http://img154.imageshack.us/img154/5705/waterlevelvn3.jpg

I spent 3 days trying to make this thing work. It does not.

iwant full water level controller circuit diagrags

pls send the circuit as soon as possible. Thankyou

i wants the complete circuit of water sensor 2 or 3 circuits

datz a gd hlpr 4 us!!!!!!!!!!111

please send some more information and circuit diagrams for intelligent garden control based on microprocessor.

This circuit DOES NOT function. April fool!!! When I put circuit on web, it was a trick. GOT YOU!!! This circuit will NEVER work, as presented. Next time...try to make you own circuits. I WIN!!!!

Sir, i want to make water level circuit and i have no clue how build can u plz help me out im realy in tention thanks.

Sir, I want to implement water level detectors. So doing this, i want to pay attention to micro controller also to control the system also.

Sir, I want to implement water level detectors. So doing this, i want to pay attention to micro controller also to control the system also.

I have tried to construct this, also tried all the modifications/suggestions...no luck. I can get it to switch on, but not off. I am trying to control a water pump. The holding tank already has the common, lower and upper limit levels sensors. I would greatly appriciate any help from you or others to email to jaredmcg(at)comcast.net . Thanks.

sir...can you send me a correct circuit diagram for water-level sensor...instead of water pump, it would be an alarm and L.E.D. i tried your previous design, and it is work well. THANK YOU.....

sir...can you send me a correct circuit diagram...instead of water pump, it would be an alarm and L.E.D. THANK YOU.....

Built it and it works flawlessly, but the schematic is not entirely correct - check out the link provided by MageMinds for correct circuit layout. I substituted the R4 for 500k and it works fine, however I had to upp the voltage a bit to approx. 13.5V in order for the relay to operate properly, should probably substitute the 12V relay for a 9V relay instead.

sir can you send me the corrected schematic diagram at zajioftheasuka@yahoo.com.ph and other circuits on water level sensor...

thanx...

can tell me about circuit of a counter which can provide the time of travell of us waves with of water level(upcoming level)and can sense that at certain situation this time is fixed

whether furnace oil is conduct the current...., this same system we can use for oil level controller in the awarded oil tank...

In the simple level sensor circiut which i tried and it trgers the relay, when the vcc and the lower electrode and the upper electrode are droped in a water The upper electrode trigers the relay and below the lower electrode it remains, until the water droped below electrode the relay will disengage that should be the normalfunction but in this case after building the circiut when the upper electrode is out and the water goes below the lower elctrods sometime it disengage but some times it doesn't disengage. Please i want an improvement on the circuit for it to work accurate as it is expalined in the manual.

In the simple level sensor circiut which i tried and it trgers the relay, when the vcc and the lower electrode and the upper electrode are droped in a water The upper electrode trigers the relay and below the lower electrode it remains, until the water droped below electrode the relay will disengage that should be the normalfunction but in this case after building the circiut when the upper electrode is out and the water goes below the lower elctrods sometime it disengage but some times it doesn't disengage. Please i want an improvement on the circuit for it to work accurate as it is expalined in the manual.

Rating Only

please send some more information and circuit diagrams for tank level alarm

sir, please send a copy circuit, i will try it for my project...thanks a lot

Sorry Circuit re-built by MageMinds not arunprabu..Kenneth

I build the circuit as suggested & modified by arunprabu. It worked very well. R4 should be 30k not 2.7meg. Another thing, probes A&B should be placed at least 5cms appart. C is the container or another probe seperated from A&B. I used 8mm probes while thinner(5mm)worked as well. Thanks for the circuit...much appriciated. Kenneth

kindly send me the detail project report on the water pump controller and level indicator with dry pump alarm circuit. for htis act of kindness of yours i shall ever remain grateful to you.

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it is a wonderful project pls sent the project to me as sonn as possible. thanks.

I have not seen the circuit yet, pls send it tom as soon as possible.

this circuit is a useful one and i need the circuit. i will be glad if the circuit can be sent to my box as soon as possible. thans

thanks

thanks

i urgently require few electronic based autometic waterlebel controller circuits for my project.

I have modified the schematics of the circuit according to Gene Rozea recommendations and it's working for me. Since I didn't had the 2.7M for R4 I used a 30K and it's working, if it's not working for you try putting a higher value there.

http://img154.imageshack.us/img154/5705/waterlevelvn3.jpg

great.

Sir,I need more(different)circuits on this project.Thanks.

Sir,I need more(different)circuits on this project.Thanks.

Hi..i found that your project is very interesting and wish to build it for school project. can u send me the full circuit of the project please?

Hi..i found that your project is very interesting and wish to build it for school project. can u send me the full circuit of the project please?

hello. i m developing project which is aquatious with this article. so can u suggest me a simple circuit for water sensor which cost me negligible amount.

can u give me the full circuit diagram pls??i have to do project for college..pls help me..

here circuit diagram is not complete. no 5 & 6 terminals r not connected and also not specified.so it cdoesn't give a complete diagram of the project,pls send me the compete diagram with no.5 & 6 terminals connection.thanx. niranjan

I want to do a project

please provide me corrected ckt diagram.ty

I am completly baffled as to why pin 1 is not connected to GND and pin 7 is connected to +Vcc, please forward me a correct diagram, or explain the reason for this, Many thanks

its good, but where is the schematic diagram?

Can you send me circuit diagrams of water level. for your information, i want to mix two element, water and oil...but i want its mix automatically when i push a start button.level for water is 3 liter and oil is 1 liter.how to make circuit diagram for this problem.

Please,i want water level monitor controller circuit.please include calculations where necessary and principle of operation.to be used as a project.

thanks a lot for the correction!!! Saves my but BIG time!!!

sir, would u please send me the detailed circuit digram which consist of an buzzer during its on/off stages.and please identify the component in the cylinderical in shape in ur circiut diagram. please do mail me the above.

ur circuit is very much useful to the daily life

please give me full circuit of u water level controller

This article is useless without a schematic or diagram to analyze.

I have checked it was a little bit wrong.The connection b/w R3 and D1 must be grounded.All other connections are o.k. #dilruba from UET LAHORE.

will you send the circuit diagram of water level detector using opernational amplifer

Sir, please sent me detailed ckt.I tried the ckt given but failed.I could not understand what u ment by sensor A given to SCR.Please give some simplifid diagram so that i will be able to work successfully on it.please suggest some other ckt for SPDT.Please give a note on the ckt right of SCR.

Can you send me circuit diagrams of water level alarms you have because i am hoping to buy one for my family and i need to see whats inside

How can you guys call yourselves “The Authority on Emerging Technologies for Design Solutions” when you let people post circuits, like this one that obviously will not work as is; there isn’t even a gate lead for the SCR and it’s one of the inputs! Probably posted by an India.

This circuit does not work!!!

i want to circuit idea related to transistor tester

i worked on ths project some pins have to be changed can u pls give the corrected schematic

sir can u plz send me the correct and precised circuit diagram of waterlevel controller the circuit shown in ur web page seems to be not working .and i would appreciate if u could send me some ideas to modify this circuit to make it much more userfriendly and attractive

Sir, i want a foolproof circuit to control 100% dry running protection

Voltage fluctuation and dry running are the two basic problems in running a domestic pump with such circuits. Please add such characteristics to your circuit.

can you send me the correct schematic diagram at my email cobalt_141@yahoo.com asap. I need to finish may prototype before monday.

can you send me the correct schematic diagram at my email cobalt_141@yahoo.com asap. I need to finish may prototype before monday.

ur. circuit do not works ,pls provide me the corrected circuit by email

dear sir,I am very much interested in ur ckt ,I tried but failed .Pls provide me the corrected ckt diagram.

dear sir,I am very much interested in ur ckt ,I tried but failed .Pls provide me the corrected ckt diagram.

i made this circuit but found no operation pl email me another correct circuit

programmefor schematic

what type of sensors should be used with this circuit??? thanks

is you practically test this circuit? .tell me how can i use indication led which show the water level in the tank .

Please send me complete circuit diagram of water level indicatorwith alarm indicating when full, different level and when empty as soon as possible. Thanks!

The LM311 in this circuit is used in an alternativ way. I also encountered problems because of the different use of the ground pin 1 and the output pin7. I had a closer look at the LM311 data sheet and then it was clear. Pin 7 ist the collector and pin 1 is the emitter of the LM311 internal output transitor circuitry. Now it runs fine!

can u make it more simpler than this with alaram and visulisation (L.E.D)using op amp and please send me the circuit with details to my email ID as soon as possible. and will like to get a complete circuit diagram of water level indicator with alarm indicating when full, different levels and when empty.

I've tested your circuit using LM311DP IC and it seems it doesn't work at all. This is a 8-pin DIP IC and im just wondering why pin 1 is connected to SCR where it should provide GND to the IC and pin8 is +Vcc.

can i use this circuit for soya oil tanks? will there be any problem? thanks!

should tell more about what sensor can be used for the specified design.the full schematic diagram would be much more helpful to understand.

can u make it more simpler than this with alaram and visulisation (L.E.D)using op amp and please send me the circuit with details to my email ID as soon as possible.

will like to get a complete circuit diagram of water level indicator with alarm indicating when full, different levels and when empty.

would you mind me sending some more circuits on automatic water level controller . i would be glad to get response from you sincerely sandeep joshi

Voltage fluctuation and dry running are the two basic problems in running a domestic pump with such circuits. Please add such characteristics to your circuit.

I would like to request that Mr. Gene Rozea draw the circuit incorporating his comments. Thanks.

Found that the circuit appeared to be misdrawn: Junction of R3 - D1 anode U1 pin4 should all be ground. Also, the LM311 outoput transistor turns off when the non inverting pin is more positive than the inverting. Senosr "B" should be to pin 3 and the reference to pin 2. Works well. Also found that the floating on sensor B caused the input voltage to be above the reference value - add a pulldown - 2.7 meg to ground to fix that.