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Category: Inside Circuits Views: 5690 Rank: 10 That circuit is based at a technique to remove or neutralize the salt in water, and protect the pipes at home as well as the washing machines or our selves from salt. Its called water softener and its automated circuit using two 555 timers.  The cost of parts is nearly 10$ and its very easy to build it. Datasheet file1: Click here to download LM7812.pdf datasheet. Datasheet file2: Click here to download LM555.pdf datasheet. Datasheet file3: Click here to download BC108.pdf datasheet.
Related circuits A single gate (open collector, noninverting) produces a simple one-shot to produce a pulse that stretches equal to t This circuit is used to meter the audio power output of an amplifier feeding a speaker. RY1 is actuated if excess This circuit exhibits a 10 V acquisition time of 900 ns to 0% accuracy and a droop rate of only 100 µ-V/ms at 25° C ambient condition. An even faster acquisition time can be obtained using a smaller value hold-capacitor. By decreasing the value from 1000 pF to 220 pF, the acquisition time... This circuit measures the power -supply current of a circuit without really having a currentshunt resistor: R1 is only 3 em of #20 gauge copper wire. A length of the power distribution wiring can be used for Rl. Telephone-controlled tape starter This circuit converts a tape recorder into a completely automatic telephone conversation recording instrument that needs no external power source. Voltage at the switch terminals of tape recorder applied to a pair of Darlington-connected transistors, Ql and Q2, will turn on and start the tape... The circuit has a frequency response ranging from 100 Hz to 3 MHz; gain is about 30 dB. Field-effect transistor Ql is configured in the common-source self-biased mode; optional resistor Rl sets the input impedance to any desired value. Commonly, it will be 50 ohms. The signal is then... A simple single-transistor circuit will give approximately 15 dB boost or cut at 100 Hz and 15 kHz respectively. A low noise audio type transistor is used, and the output can be fed directly into any existing amplifier volume control to which the tone control is to be fitted The circuit displays drain current versus gate voltage for both P and N-channel JFETS Simple Water Level Controller
how to make a water level indicater
Comments
Average Joe wrote on Dec 3, 2008
Looks like all the resistors are present to me. First timer ~ 4.6Hz, second timer ~1.5Khz. The first timer is frequency modulating the second timer. "L" is an inductor, a coil of wire would around the pipe to couple the water to a varying magnetic field. Can't imagine how this softens water.
Al. wrote on Apr 11, 2008
Bogus schematic. left side is missing, where timing resistor would be, on the first IC!!!
Also, on what kind of chemical or physical mechanisms does it work ????
To make any difference, on the water passing thrum that pipe, you might need a few kilowatts!!!
Both oscillators seem to output same frequency ?!?!?
Jeez...
sethu wrote on Jul 3, 2008
sir/madam,
This is sethu from india.i am a regular reader of next.gr.now i want to know some details about water softener circuit.in the given circuit what is "L" it means what?? plz explain that and give some details about what kind of chemical reaction will take place in water due to this circuit..thank you.
SHAHUL HAMEED .S wrote on Sep 18, 2009
M any more thanks for issue of water softener circuits. O.k. Since impure water contains solute particles as calcium&magnesium in the form chlorides and sulphates the hardness come out.Even though there will be different system such as r.o&ion exhange process, water softening by high frequency mean
s.shahul hameed wrote on Sep 18, 2009
Complete idea regarding high frequency based water softening system details available on my mail . My mail id shahul_1965@rediffmail.com .
rapjr wrote on Dec 5, 2009
I bought a commercial version. This circuit keeps minerals in solution. Before, I had rock hard crusts on faucets and showerhead, after 6-12 months (works slow!) they are now soft, easy to remove, and don't form as fast. I also built this circuit, those 10nF caps should be 10 microfarad!
shahul hameed .s wrote on Jan 11, 2010
please understad electro refining during crystalisation of impure silicon to pure silicon crystals by recrystalisation methods from solution contains silicon.
Lou wrote on Mar 24, 2011
What is the value of the coil.
Thank You
Lou
jay wrote on Jul 19, 2012
what turn for 75 dia. pipe
Ken Sparkes wrote on Aug 18, 2012
What is the purpose of the c7 220uf cap
Ken
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