diy water softener system

DIY Water Softener System

Hard water has a high concentration of minerals, and of these calcium salts are the most troublesome. But there is a solution coming in form of a cheap diy water softener system built with the well-known 555 IC. Actually the price of this diy system is so low that even if this doesn’t work you won’t be upset.

The working principle of the water softener is based on a theory from 1930 which states that an electromagnetic or electric field causes small crystals of calcium carbonate in the water to join together to form larger crystals.

One of the methods to obtain a strong magnetic field is to put a powerful magnet (2.5 gauss) near the water pipe. The second method is the electronic one. Studying a water filter purchased from stores we found that it produces a frequency of about 15 kHz at an amplitude of 15V.

Schematic of the Water Softener Circuit

water softener system schematic

cheap diy water softener system circuit schematic

UPDATE: If the water pipe is metallic then connect the open ends of the coils to the pipe, or if it is made of plastic connect each open end with a conductive wire (copper).

Extension: water softener power indicator

The values of the coils are not known, but my guess is L1 has 9 turns and L2 has 7 turns. Actually you should consider this circuit as a theoretical one.

Therefore this water softener system uses one 555 IC to obtain a rectangular signal that is applied to the water pipe by wrapping two coils with one open ending around it. The coils must have good isolation. Make sure to power the water softener from a isolated power supply because in some areas the water pipes are connected to ground.


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  • Howard

    Whether this works or not this is a “BIG” money industry.

    I was going to make one of these using a 555 timer driving a Flip-Flop which then would drive an MOSFET H-bridge to utilize the low channel resistance of the MOSFET’s.

    I find it hard to believe this works. I assume the principle is to De-magnetize the polar minerals so they wont bond to surfaces. My issue is that if water is left sitting IE on Sink or the bottom of the Shower when it evaporates it will leave the minerals behind.

  • argi

    Please, for another time, check the circuit.
    There is not any electromagnet field, the output of 555 is on the “air”. It produces only electric pulses. If theory is correct pulsing electric field “cause” something to water. We have only switching voltage potential difference.

  • Twinkle Bettery

    Im just passing by till I realized what this article is about. Seriously someone tell me if any of the above commenters especially the original poster has taken a college class in general chemistry and organic chemistry. This whole saltless water softener stuff with trying to induce an magnetic field in moving water is smoke and mirrors. I’ve been in chemistry lab doing experiments with resin exchange material and it works far better as a separator on the atomic level than an magnetic field. Even if this device were to work, water is going to after other metals to replace the calcium it lost because pure, decriminalized water will go after metals. Its the reason bottled water contains minerals. Show me the physics of how calcium particles in moving water passing through a magnetic field will cause them to clump together. Magnetic fields can only be made if you have a changing electrical feild as both are related to how much current is going through the wire as explained in Maxwell’s equation. Plus the schematic shows whole system runs on direct current. How is the two coils from from the node to pin 1 and pin 3 of the 555 timer going create a magnetic field? Show me the wave form the oscilloscope for L1 and L2 of this schematic. I probably bet it would not show a sine wave. The 555 timer chip can’t even run on AC electricity which gives a changing electrical field which also gives a changing magnetic field. TL:DL; Stop with the saltless water softener cause the physics proves it will never work. Get yourself a real water softener with the resin exchange material and call it a day.

  • Double EE

    Come on Guys, don’t you know you will need a muffler bearing with which will allow the electric field to rotate until it creates an electromagnetic field around the cast iron pipe. This field will not be affected by the iron due to it being tied up with some shore line. You will need 14.96734 meters of shore line to complete the job. This line can be found near the ocean. You could use a smoke grinder to cut down the pipe so the bearing fits well. On the working model, a 4000 F capacitor was required. It was found to be much to large to be manufactured by a local provider so it had to be constructed from raw materials. I used an ion phase atom disruptor to fuse the mercury oxide into an insulator to be wrapped around the pipe to get a perfect resonance through the circuit which will contaminate anything it contacts. So with this amount of stupidity involved, I got me a good cold drink of bottled water. Come on guys, don’t be stupid.

    • Chinmoy Mitra

      Double EE is a genius! You have summarised this whole stupid pseudo project in one paragraph. Hats off to you!

    • Sam Star

      I totally agree with you, this is the exact way it should be done, or we’ll never be able to achieve any useful outcome.

  • Eugen

    Es ist reine Zeitverschwendung, diesen Versuch nachzubauen.
    Ähm ..Magnetfeld contra Mineralentsalzung- durch ein Kupferrohr
    ist totaler Blödsinn. Ab zur Garbage Collection.

  • Ehsan

    Surely this circuit work. the two coils and the water act as a transformer. However i have build a better circuit. it is working in my home (i have no explicit results yet). i connect the pin 3 by a 100ohm resistot to Base of a pnp and npn transistors that are common in their emitters. collectors are connected to vcc and gnd. the emitters’ node then is connected to a 25uf capacitor series with a 10ohm resistor series with a 50 turns coil that is arround the pipe. the end of the coil in connected to GND. the coil is near 0.025uH. the voltage across the 10 ohm resistors is a square wave between -1.2 and 1.2 volts resulting a 120mA current passing through coil. i am waiting for result!

    • Chinmoy Mitra

      Please keep waiting for results! You will never get any results from this crap! Good luck

  • Curi

    the pdf link you posted is the same one posted previously by Mr Chapman.
    That really isnt any help in attempting to assess your personal success or failure using this idea. Did you actually try building this or not?

    The closing of the wire coil ends seemed clear, just from reading the original post in this topic, so Im not sure where the comments about the open ends came from. When I started reading comments that confused me so I went back and read the original post again, but the closing of the coil ends is described there.

    We use well water here, but the levels of mineral and metal particulates in the water make it unpottable. Financial contraints make it unfeasable to treat the water using mass produced purification we’re searching for the means of building our own treament facilities very cheaply. We’ll need to “soften” and filter the water removing the large limestone (calcium )and iron particles before anything else is done to it…we’re investigating ideas like this one very seriously.

    Im reading the paper you posted now.

  • rocky


    Every one here only cracking each other but no body iz caring to build this one, so i decided to do this my self. then i will post the output, thank u

    • C.Mitra

      Hi rocky
      The fact of the matter is that this circuit CAN NOT work!
      Richard Chapman says “This circuit does not create a magnetic field: it creates an electric field.” Imagine an electric field created by a few milliamps of current in a tiny little piece of wire (the wise guys talk about 75 turns, 19’7½” etc hahahhaa)removing dissolved salts in RUNNING water THROUGH A THICK METAL PIPE! How absurd can this get?
      Wish you best of luck for building this circuit, please do post your experience once you try it.

  • Gary

    Further the tests I carried out with a range of flux density’s and frequency’s (Using Glass,rubber,Copper,Iron pipes)(Feb 4 2014) have a look at
    > <

    ** NOTE lines 5&6 page 1 ** & also 'materials and methods' on page 3 and reference to the“Water King'' WK1 conditioner

    If pipe is Copper or Iron an "E" field will not penetrate it and if it is an Iron pipe a "M" field will not penetrate it