Discussion in "New Ideas regarding projects" started by    coolmirza143    Nov 26, 2010.
Fri Nov 26 2010, 08:24 pm
#1
Hello Everyone...

I wanna make a system that will automatically full the water tanks thats are placed at third flour of my House.... Capacity of each tank is 2000 Litters and its looks like this


we have a water supply three times in 24 Hours for 3 hours each time.
in morning its from 5am to 8am
then 12pm to 3pm
then 6pm to 9pm


i have installed a small water pump to fill the tanks and it takes 2.5 Hours to Full both Tanks...
this pump is used



all setup is working fine...

now the problems that i am facing...

1. Pump water seal leak due to dry Head.

2.Tank water Overflow Problem.

3.No monitoring of water flow in case of pump running.

so i wanna overcome these problems.....

first i need a water flow sensor that will be interfaced with controller and there will be an indication in the form LED.

then i wanna make a level system that will show Tank water level status..... we can use three LEDs for Low, Medium and High.

Then a buzzer system to inform that the tank is full and then controller will automatically switch OFF the Water Pump.


give me suggestions........

is there any possibility to make water level mechanism ?? and how to calibrate it according to tank capacity??

how to make it dual??

mean when controller switch off the motor then next time how we can again turn on it?? wat king of Magnetic Contactor i need??

Fri Nov 26 2010, 09:47 pm
#2
i found a water level meter simple to build and can be easy to interface with mc...



original link
Fri Nov 26 2010, 10:02 pm
#3
water level meter installation design...



circuit is shown in above post and this is sensor portion.
Fri Nov 26 2010, 10:21 pm
#4
Here is water flow detector....

i am using same circuit to sens water flow through PVC pipe as i used in water level meter in above post...



hardware portion is almost complete now i will write the code for it......


Sat Nov 27 2010, 05:53 am
#5


the water tanks thats are placed at third flour of my House.... Capacity of each tank is 2000 Litters

coolmirza143


Wow, I hope you have good floors

Your sensor system uses DC which will cause corrosion and unreliability.
Steel screws will quickly rust making it even worse.
Commercial systems use ac signals, generated either from a transformer
or a square wave output from a micro.
Sat Nov 27 2010, 10:03 am
#6
hi what is the name of that sensor that can detect water?

Mirza, u may use that sensor and place at the buttom and top of tha tank to send a signal to micro if it is full or not.
U may also place another sensor to the source pipe to inform the controller that water is available and ready to fill the tank again if it is not full. The purpose of the third sesor is to prevent the pump being turned on without a water source bcoz u said that the water there is scheduled.
Sat Nov 27 2010, 11:11 am
#7
here is one more water level meter using 2051 and it is quit simple than transistor one!!!


so i can use this circuit to monitor water level...

now the problem is corussion!!! how to avoid screws from corussion........?

Sat Nov 27 2010, 11:23 am
#8


hi what is the name of that sensor that can detect water?

romel_emperado


special sensors are available in market that can detect water but these are costly i wanna make it cheap and you know romel if u have skill then you have to find simple ways......so i am using simple transistors to detect water, when water touches a screw small amount of voltage is applied at the base of transistor and it switches ON the LED....


Mirza, u may use that sensor and place at the buttom and top of tha tank to send a signal to micro if it is full or not.
U may also place another sensor to the source pipe to inform the controller that water is available and ready to fill the tank again if it is not full. The purpose of the third sesor is to prevent the pump being turned on without a water source bcoz u said that the water there is scheduled.

romel_emperado




you are right i can place two sensors at the top and bottom of Tank,,,,but by doing this there will be only two water levels i can detect and these will be MAX and MIN.........so i am using 8 sensors to detect more Tank levels and these levels will be displayed on LCD as "Tank Status" .......10%.....20%....40%.......ans so on....

yes the same sensor i will use to detect water flow through pipe....
Sat Nov 27 2010, 11:30 am
#9
hi mirza
here is one more circuit i use it many times
http://www.electronic-circuits-diagrams.com/alarmsimages/6.gif
ur pvc pipe idea is good and also work too
do protection of wire becoz water will dissolve wires with respect to time
as u get signal from controller that water is at high level then pump remain off as bottom level reaches pump on and keep on for high level
make design for 1 floor then of second one




as ur above schematic optoecoupler is also a good option


[ Edited Sat Nov 27 2010, 11:35 am ]
Sat Nov 27 2010, 11:38 am
#10



Wow, I hope you have good floors

ExperimenterUK



ya Phil I have concrete Floors......


Your sensor system uses DC which will cause corrosion and unreliability.
Steel screws will quickly rust making it even worse.
Commercial systems use ac signals, generated either from a transformer
or a square wave output from a micro.

ExperimenterUK



I agree Phil D.C cause electrolytic corrosion and unreliability.... i see a circuit that uses A.C to avoid this corrosion.....

Click the circuit below to check its working.....



where i have to apply ac voltage for input???

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