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Two models will be shown, one full-wave rectified and the other a half-wave rectified negative ion ionizer. Featuring an optional fan on the full-wave model.

Benefits of negative ions supposedly include
• freshen and purify the air
• help lift mood
• alleviate depression including winter depression(SAD)
• eliminate most tiny particles suspended in the air (indoors)

CAUTION
  • HIGH VOLTAGESpresent in both devices is high enough to induce a bad case of temporary Tourettes. ie twitching/profanity.
  • Be aware of the hazards when working with loose CARBON FIBRE filaments if using this option for high voltage grid instead of pins.

Step 1: Components and Design

Tools required:
  • soldering iron and solder.
  • screwdrivers, flat and star
  • cordless drill.
  • hot melt glue gun.
Optional tool:
  • wire wrapper.
The full wave rectified version has better performance but is a bit noisier if using the optional fan. The fan is a 60mm x 60mm CPU 12 brushless fan which I'm driving at
5v to reduce current consumption and noise.

The half wave version uses fewer components and less current, the smaller size is also trickier to build.

In both versions the negative band on the diode must point towards the ac voltage input.
If you follow the green arrows on the component diagrams, you will first encounter the negative side on the diode first, indicated by the white band.
Nice instructable. I made one of these some 30 years ago. My mum wasn't that happy about it, because the high voltage charges fine dust particles and they are attracted by more or less grounded surfaces like walls and even windows ;-) If you direct the ion flow trough a grounded tube, you have a electrostatic air cleaner. (you can have a thin wire insulated in the center of the tube and connect the high voltage there. As it's done in laser printers.) You can also make a ion propulsion propeller...
How can I make electrostatic air cleaner by using this?
<p>https://www.youtube.com/watch?v=2uD9wtq29h8</p>
<p>There should be absolutely no connection between live or neutral to ground,even through a capacitor unless it is specifically class Y rated and a very low value. An ioniser will find its ground reference through the mains supply. In this design the entire side connected between neutral and ground will be pointless. There is a reason the traditional ioniser design just had the multiplier between live and neutral.</p>
BigClive knows best :)
Made it but added a few extra things, uv led and spiral coil going to to the pins, and pvc with screw on caps to protect it when it's stored or moved.
<p>I tried a cheap, over-powered ionizer in my home for a few months, until it corroded itself apart. I'm sure the ozone levels were above recommended, but I didn't notice any negative effects on my health for those few months. However, I noticed a carton of milk in my fridge which was 3 months past due, and it still tasted fresh. Coincidence? Maybe.</p>
<p>Nice instructions and final &quot;products&quot;. I have one question regarding the full wave multiplier bridge, for our household grid power, it does not seem to make sense to use it because we don't actually have V+, V-, and GND per se. Even when you showed three prong outlet, the voltage on LINE (V+) is relative to NEUTRAL (V-) which is basically the same as V+ to GND due to NEUTRAL and GND bias voltage pretty small. Can you comment?</p>
<p>Quite correct, I looked in my &quot;street connection&quot; box and saw the &quot;neutral&quot; tied to earth.</p><p>I just figured it would be better ripple wise to use the neg portion of the ac sine wave as well.</p>
<p>Could one make two half wave designs. One of them wired as shown in your diagrams and the other with the diodes reversed to produce positive ions. Then attach both half wave arrays to the same AC power source to get positive ions half the time and negative ions the other half?</p><p>I'm attempting to eliminate static charges on a plastic surface by bombarding it with positive and negative ions.</p>
<p>http://negativeionizers.net/negative-and-positive-ions/</p><h2><strong>What Are Positive Ions?</strong></h2><p>Positive ions are <br>usually carbon dioxide molecules that have been stripped of an electron.<br> Also known as positively charged ions, they have been demonstrated to <br>have a negative effect on your body.</p><p>This is particularly the case<br> with your lungs and respiratory tract but your immune system can also <br>be affected. This is because positive ions can be so small they are <br>absorbed directly into your bloodstream from the air you breathe. </p><p>An<br> excess of positively charged ions in your environment is believed to <br>contribute to tiredness and a lack of energy, tension, anxiety and <br>irritability. Positive ions have even been investigated as a <br>contributing factor for <a href="http://mypage.direct.ca/g/gcramer/asthma.html">asthma</a> and depression.</p>
<p>I appreciate the article link. That is valuable information for all to be aware of. However, my application would be in an environment where positive ions would be required to restore electrostatic balance to a large piece of plastic:</p><p><a href="http://www.electrostatics.com/page2.html" rel="nofollow">http://www.electrostatics.com/page2.html</a></p><blockquote>Some materials such as glass, hair, and Nylon tend to give up electrons and become positively charged. Other materials such as Polypropylene, Vinyl (PVC), Silicon, Teflon, Silicone tend to collect electrons and become negatively charged. The Triboelectric series is a listing of various materials and there tendency to charge positive or negative.</blockquote><p>I hope to use the ionizer to balance the negative charge (as cited in the above article) from polypropylene, vinyl, and some acrylics. To do that I need positive ions. I also understand the need for negative ions as electrostatic charges fluctuate greatly across a large sea of atoms.</p><p>While I understand that the positive and negative ions generated will never be equal, thereby canceling each other out, I strongly feel that the majority of positive ions generated will be balanced after contact with the negatively charged plastic. The small remainder should be balanced by the now numerous negative ions, relative to the positive, with a net surplus of negative ions escaping into the environment.</p><p>Thank you for your time! </p>
<p>Hi, if you measure 6 kV on the carbon tips, does that mean it produces positive ions? I measured on some Chinese ionizers and I measured <strong>-6</strong> kV... Thanks.</p>
<p>You will only get a positive output if your diodes are the wrong way around.</p><p>Their polarity must be as in step 1.</p><p>Positive ions will do more harm than good.</p>
Hi,<br><br>Ok, thanks for your reply. Its an industrial custom made one we are testing at work, but i guess our electronics specialist was sleeping or something ?. Its for reducing fine dust in big spaces.
<p>what if i reverse the polarity of the high wave circuit.</p>
<p>Positive ions will do more harm than good.</p>
<p>thank u sir</p>
<p>thank u sir</p>
<p>thank u sir</p>
<p>thank u sir</p>
<p>thank u sir</p>
<p>thank u sir</p>
<p>thank u sir</p>
<p>how to check whether my voltage multiplier circuit is working or not as there is no blue glow on the needle......</p>
<p>Read the comments, a lot of folk have added valuable contributions to further this sphere of knowledge.</p><p>Build a diy Electroscope, comment to SARMAC lower down.</p>
<p>Great educational stuf from Dave<br><br><iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/ep3D_LC2UzU" width="500"></iframe><br><br><br></p>
<p>Can I use Ceramic disk capacitors? .01mfd 1KV? unable to source PP ones.</p>
<p>No experience with them, in theory they should work.</p><p>However they are physically much smaller and might fail. They seem to be more signal orientated compared to the ones I used, designed for mains power applications.</p>
Would this setup work with 110v input? If not, what would I need to change/add? Thank you.
<p>Sure would, output voltage might be a bit low though, but you could always add 2 or 3 more stages to compensate. </p>
<p>Thank you :)</p>
What area cover the full wave ionizer
<p>Dear Sir,</p><p>I have tried constructing a ionizer 4 to 5 times. But I could not get the result.</p><p>Now I have constructed the full wave ionizer as per your instructions. This time, I got the result. the voltage at the second capacitor itself has crossed 800v.If we bring the line tester near the tip of the pin, even without touching the pin, the light in the tester is glowing. when I move the tester even closer, blue light is coming between the pin tip and tester tip. Does this mean the circuit is working? </p><p>But I could not smell anything. is there any way to test whether this ionizer is working or not?</p><blockquote>Thanks again for giving valuable instructions. <strong><em>Kindly let me know how to test whether negative ions are coming out or not?</em></strong></blockquote><p>Thanks in advance,</p><p>CH M S SARMA</p>
<p>If you can see the tips glowing in the dark and all the diodes are correctly orientated then only neg ions can be present at the output spike/pins.</p>
<p>Dear Sir,</p><p>I have a small doubt. will the tips glow themselves? or we have to bring the tester near the tips? If I bring the tester near the tip, I can see the blue spark between the pin and the tester. and when we bring the tester near the tips, even without touching the pin, the light in the tester is glowing. I have checked the orientation of the diodes and everything is ok. </p>
<blockquote>I can see the blue spark between the pin and the tester. and when we <br>bring the tester near the tips, even without touching the pin, the light <br> in the tester is glowing. I have checked the orientation of the diodes <br>and everything is ok.</blockquote><p>You've answered your original question, its working.<br></p>
<p>I have one more question Sir. suppose we give the central pin to neutral and both the other ends to Line and we will reduce the Capacitors to half. will it give the required result? can we use alpins at the end as emitter?</p><p>Thanks,</p><p>CH M S SARMA</p>
<p>You could try other configs to see which gives best result, anything conductive and sharp can be used for emitter</p>
<p><strong>IT WORKED</strong>.. I have made a circuit of 6 capacitors in a row and given both ends to line and center one to neutral. I can see the blue spark when I bring the line tester near the pin. Also when I brought the tester near the pin from 1cm distance, the light in the tester is glowing. Any problem will have in this design? or I can use this?</p><p>Thanks,</p><p>SARMA</p>
<p>It should be fine, it might just be a lower voltage.</p><p>Leave it on in a vacant room for 1hr or 2 and see if theres a freshy electric kind of smell when you come back in.</p>
<p>Dear Sir,</p><p>Will there by any noticeable difference between full wave and half wave ionizer. can we make this circuit without a Fan?</p><p>Regards,</p><p>CH M S SARMA</p>
<p>Nothing you'd notice, fan not needed.</p>
<p>Dear Sir,</p><p>I have purchased the capacitors and made the half wave ionizer. If I bring the line tester 1 inch near the tip/resistance, the big blue spark is coming. </p><p>Then I checked the capacitors. they are .33nf. I hope the capacitance will not effect the output voltage. Further, when I checked the crockfit Walton voltage calculator, in 14 stages - input V 220AC - capacitance - any - load current .1 mA, the output Vmax is 9kV. Don't you think that this value is very high for generating the negative ions? Interestingly, the output voltage is not changing with capacitance. </p><p>I am not able to understand whether the circuit will generate negative ions or not.</p><p>Hope you will clarify my doubt.</p><p>Regards,</p><p>CH M S SARMA</p>
<p>The output voltage is dependant on the number of stages, not the cap values.</p><p>If your applied voltage is on the negative side of the diode, a negative voltage will be present at the output pins, you can chisel that into rock, right next to death and taxes.</p><p>When the neg voltage at the output pins becomes high enough, negative ions will depart into the surrounding air from any sharp points, low voltage = few ions, high voltage = many ions.</p><p>The only way for you to erase doubt/confusion is through knowledge. </p><p>Experiments will allow you to observe static electricty fundamentals to gain the required knowledge, with that in mind build a simple electroscope to determine that your device emits ions. </p><p>Then precharge the electroscope with a positive static charge, the foils will repel each other, now direct your ioniser to the electroscope, a negative charge from your device will cause the foils to drop/close.</p>
<p>Hey Peterrc</p><p>I have bought a commerce negative ion generator that is rated for 7.5kv. I was wondering if i could use this to make a ait ionizer. When i run it it can ionizns the air but i dont know how i would set it up to capture dust.</p>

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