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ELECTRONIC HARD WATER SOFTENER

Last update 27.11.11
The electronic water descaler is more effective device than powerful magnets placed around the incoming mains water pipe. This device operates by wrapping coil of wire around the incoming water mains to pass a magnetic field through the water. The theory is that it causes the calcium in the water to stay in solution and so inhibit it from adhering to pipes, taps, baths and kettles.
Reading many sources about the way it works I decided to try and make one. A few days after installing it I noticed a difference in the behaviour of the deposit of lime scale in the kettle and around the sink, it was much easier to remove the deposit, also the scale deposit was reduced to about half the amount.
Since it's unknown the true benefits of lime to our health and we also don't know the effect of the residual magnetic in the lime, it is recommended to use the descaler for washing water only.

There are 2 version for the circuit, both have similar characteristics. Select the one that will be easier for you to get the components.
Click Download Software to download circuit diagram.

CIRCUIT DIAGRAM 1 USING 555 TIMER

Circuit 1 Description
See also Technical Tips

  • The +V is 8 to 10VDC. The current at 10V is 50mA. Any 9V universal power supply is powerful enough. Make sure the voltage does not exceeds 15V because it can damage the 555 timer IC.
  • The coil on the water pipe is made of 5 meter long insulated wire of 24 to 20 gage. The wire is turned around the copper or plastic water pipe (it can not be steel pipe) in a single layer. On a pipe of 20mm diameter it will form 55 turns. Since the wire is 5 meter long the number of turns will be different for different pipe diameter.
  • The circuit is a 12KHz oscillator with a coil of 470uH at the output to limit the current through the water pipe coil to 300mA peak.
  • 56K resistor and 1nF (1000pF) capacitor determent the frequency.
  • You can use equivalents for BC337 and BC327.
  • 555 timer has to be bipolar (555N) .
  • 470uH can be any type that can carry 300mA.
  • 1N4148, 680 ohm and LED are optional components to indicate output signal and coil are present.
  • All resistors are 1/4 watt, 5% .

 

CIRCUIT DIAGRAM 2 USING 4049 CMOS

Circuit 2 Description
See also Technical Tips

  • The +V is 8 to 10VDC. The current at 10V is 50mA. Any 9V universal power supply is powerful enough. Make sure the voltage does not exceeds 15V because it can damage the 4049B CMOS.
  • The coil on the water pipe is made of 5 meter long insulated wire of 24 to 20 gage. The wire is turned around the copper or plastic water pipe (it can not be steel pipe) in a single layer. On a pipe of 20mm diameter it will form 55 turns. Since the wire is 5 meter long the number of turns will be different for different pipe diameter.
  • The circuit is a 12KHz oscillator with a coil of 470uH at the output to limit the current through the water pipe coil to 300mA peak.
  • 33K resistor and 1000pF capacitor determent the frequency.
  • 4049B is a 4000 series CMOS. Any make is ok.
  • 47nF cap. and 1K resistor are noise suppression, they can be omitted.
  • You can use equivalents for BC337 and BC327.
  • 470uH can be any type that can carry 300mA.
  • 1N4148, 680 ohm and LED are optional components to indicate output signal and coil are present.
  • All resistors are 1/4 watt, 5% .

There are 2 third party sources of kits to buy on eBay:
http://www.ebay.com/itm/Electronic-Water-Descaler-Decalcifier-Limescale-Remover-do-it-yourself-KIT-/261324613255?pt=LH_DefaultDomain_0&hash=item3cd8292687

http://www.ebay.com/itm/Electronic-Water-Descaler-Decalcifier-Limescale-Remover-DIY-KIT-student-project-/271520568678?pt=LH_DefaultDomain_0&hash=item3f37e31566





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Comments

Copy the number from the picture It stops net-robots from adding comments.



29.05.2015 - 18:26
Name:
Comment:

14.05.2015 - 23:07
Name: Moty
Comment: NE555,CD4049B

14.05.2015 - 13:00
Name: girish
Comment: What is the number of 2 IC used in this circuit of water softener..?

03.01.2015 - 10:58
Name: apex.charanjit@gmail.com
Comment: very useful product.Also guide us on the product with 2 coils for more efficiency. Regards Charanjit Singh Bains

24.06.2014 - 09:26
Name: Ravinder Kumar
Comment: Dear sir Kit is now available at ebay as linked below http://www.ebay.com/itm/Electronic-Water-Descaler-Decalcifier-Limescale-Remover-DIY-KIT-student-project-/271520568678?pt=LH_DefaultDomain_0&hash=item3f37e31566 thanks and regards

13.06.2014 - 17:50
Name: Moty
Comment: Hi Suek. In most browsers you right click the image and select to save it. I attached a copy. The softener gives different results depending on the minerals in the hard water.

13.06.2014 - 08:55
Name: Suek
Comment: I\'m really interested in this as a project. Let me start by saying though that I cannot get the images of the circuit diagram to load properly is there anywhere else i can go to see them. Does this softener reduce the hardness of the water?

09.06.2014 - 03:07
Name: Moty
Comment: Hi Girish. The number of turns isn\'t critical. The current through the coil is dictated by the inductor on the PCB. The copper tube reduces the magnetic flux because the circuit sees it as a single turn coil. You will get stronger magnetic flux winding the coil on a plastic tube. There are many reports of researches of softeners on the web. You will find that the results of experiments are inconclusive and vary a lot depending on the minerals in the water. This leaves you with the option that you have already seen, to wait and see the results in your house. I\'ve never tested the kit from Thailand, looking at it made me convinced that it is exactly my circuit. The LED is on the output so if its lit it means that the output is on.

08.06.2014 - 10:48
Name: girish
Comment: Hi Moty Thanks for the instructions for novice DIY enthusiast explaining the science. I have ordered the kit from the supplier, however with a 22mm pipe I achieved more that 60 turns, will this affect the performance of the device. On the kit there is a LED to indicate power supply on, is there any thing else that needs to be noticed for the device to be working. Some of the comments are about frequency counter and oscillations, am I reading too much into it. Should I just wait and see if there is improvement in the water condition and scale formation. Thanks.

26.05.2014 - 14:11
Name: Moty
Comment: Hi Ravinder, Good luck with your business venture. If you wish I can put a link to your shop on my website.

25.05.2014 - 18:13
Name: Ravinder Kumar
Comment: I happy that designer of the kits wants to promote it for the benefit of society: I am collecting the full kit with essential hardware soon it will be available for public at no profit no loss basis enquiries are welcome at RK1049@gmail.com

25.05.2014 - 18:08
Name: Ravinder Kumar
Comment: the circuit option II is tested and tried and works well kit at no profit no loss will soon be available with us

12.02.2014 - 18:52
Name: Moty
Comment: Hi Gulabhai. Use the coil as shown on the project page. You may not get much effect of softening with 50 mm tube.

12.02.2014 - 11:35
Name: gulabhai
Comment: Hello, How do use this circuit with irrigation water 50mm pvc pipe?

28.01.2014 - 01:55
Name: Moty
Comment: Hi Tim. Thank you for noting that out. The eBay seller copied the description from my website, I also had a close look at the PCB, so itís very likely that they used my circuit. Of course everything on the site is totally free to use. Iím also pleased to fine that some more people will be able to DIY soften their water. I will add a link to this kit.

27.01.2014 - 19:19
Name: Tim
Comment: Good day. Is this kit the SAME as your design? THANKS :-) http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=281228582254&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en