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Electric Fly Swatter/Zapper Racket High Voltage Power Supply

Electric Fly Swatter/Zapper Racket High Voltage Power Supply


Hi Folks!
This is an electric fly swatter, or racket zapper,
made for killing flies. But it also makes for a very cheap,
though limited, high voltage power supply.
Here it’s powering a Franklin’s bell. And if you just want to make some sparks,
it does that too. You can find them in stores like Walmart,
Home Depot, Maplin and many others,
for under $8.00 or 4 euros, and also online.
This one uses two AA batteries. It has a switch on the side
that you have to hold pressed for the high voltage. Here’s a closeup of the high voltage side.
It’s made up of three meshes. An outer mesh here,
a middle one with smaller holes, and another outer one on the other side.
Here I connect to the two outer ones. When I turn it on, there’s clearly no spark.
That’s because the two outer meshes are electrically connected together.
The high voltage exists only between the outer ones and the middle one.
To prove that I wrap some non-conductive tape around most
of the end of an alligator clip. That’s so that I can clip to the middle mesh
without electrically connecting the outer mesh.
The other wire is still connected to the other outer mesh.
Either one will do. This time I get sparks. And here I’ve set up a Franklin’s bell.
In the middle of the two cans is a ball of kitchen aluminum foil.
I couldn’t get it to work with a soda can top though.
It seems to need something rounder. But there wasn’t much else I could get working
with it. There wasn’t enough current to ionize enough
air for my ion wind rotor. And also not enough current for my big corona
motor. And I know it wouldn’t work with a lifter,
or a smoke precipitator, so I didn’t even try those. Here I’ve set up my oscilloscope
and Fluke 80K-40 high voltage probe for measuring the voltage.
You can see it’s relatively low, only around 1400 volts. And finally, time to open it up and see what’s
inside. I even pry apart the racket section
to see where the wires go to the three meshes. One outer mesh is connected to the circuit
via this yellow wire, the middle mesh is connected via this red
wire, and the other outer mesh is connected via
this other yellow wire. And looking more closely at the circuit board
we can confirm that the two outer meshes are electrically connected together,
right here where the two yellow wires go to the same place. I then unscrew the circuit board.
You can see where the positive of the batteries goes to the switch
and from there to the board. While the negative of the batteries goes directly
to the board. And for those really curious,
here’s the schematic I made from analysing it.
It’s almost the same circuit as this joule thief circuit I used
to power this compact fluorescent lightbulb. There’s just an LED and current limiting resistor
added to tell when it’s turned on.
And on the output there’s a diode to turn the output into DC,
and a capacitor for smoothing. There’s also a bleed resistor,
to get rid of the high voltage when it’s turned off.
Plus another resistor right here. But other than the LED and the modification
to the output they’re both the same blocking oscillator
circuit. And that’s the electric fly swatter, or zapper
racket. Well, thanks for watching! See my youtube channel, rimstarorg for more
neat videos like this. That includes one all about the Franklin’s
bell that I demonstrated. Another on making a much more powerful
30 kilovolt high voltage power supply. And one all about my compact fluorescent lightbulb
powered by the joule thief circuit. And don’t forget to subscribe if you like
these videos, or give a thumbs up,
share with your social media, or leave a question or comment below. See you soon!

Comments (57)

  1. Why is there need for DC on the grids?

  2. Do u have kakao Talk?

  3. Hmmm, you gave me lot of ideas. Thanks!

  4. Nice video as always! I guess the capacitor isnt for smoothing, but rather for storing the energy so that you dont have to constantly hold down the button.

  5. My experience: If you remove the bleed resistor, the voltage gets higher, but also results in an angry girlfriend who had her finger electrocuted …

  6. Can you make a high voltage supply from a teaser? I need one to make a TEA LASER , will it work ?

  7. You need to modify this fly-zapper into a suet feeder with a remote control.  The purpose being to allow all birds to eat safely, but when you see a starling land on it, you can turn it on to kill/deter these flying rats.

  8. You should hook one of those up with a microwave capacitor its quite dangerous but fun

  9. very interesting!  

  10. I made a taser out of one. nice video.

  11. Question, In the schematics it says the output cap is 400V but in the scope you show 1400. Is that normal? i've tested ceramics and electrolitics way above their nominal voltage and some seems to not have any problem despite losing capasitance (i suppose, havent actually tested that) but from 400 to 1400v seems to be a bit too high for it not to fail, more when i've seen those fail with just mains transients.

  12. Great explanation. I like how you came up with some creative uses for it (although zapping flies is fun).

  13. Excellent teardown, enjoyed that. Also the comparison section to the other circuit.

  14. Nice, I have a bunch of these laying around, the oxide layer makes amazingly huge sparks. It's good for killing and having fun lol

  15. Can you power a CLF from it , please tell

  16. You need to do a video showing how to put in a transformer with a higher turns ratio to get the voltage higher!

  17. It would be interesting to see you mod this to power your CFL camping light. How long could the modified circuit run the hacked CFL?

  18. very interesting !
    i have been always wondering how these things work, nice to know now.
    by the way i have noticed a better image quality regarding to this video. what codec do you use to edit on your Sony Vegas?
    i have been going native for long time with h264, but need to replace it with something softer.

  19. Maybe mod it add li-ion baterry and baterry charger and better high voltage circuit so it kills anything you touch?

  20. Trying out an electric fly swatter as a high voltage source – and of course taking it apart to see what's inside :).

  21. Hi Rimstar, i looked at the schematic for the zapper and i dont understand the symbol for the transformer. It looks as thought it is in two parts. What model of transformer is in the zapper? Is there a part number?

  22. Also would like to see your results with the CFL mod please, I would like to try myself if it saves me the time finding the parts I need for the Joule Thief as I have an old model fly zapper ready to go.

  23. Great video! :-). You can find them at Harbor Freight as well. You can raise that 1400V with a simple multiplier circuit, but of course the current would drop.

  24. $8US or 4 euros? $8US is 7 euros here 🙁

  25. this video really reminds me of my early youtube days in 2009. because this http://web.archive.org/web/20090602045032/http://sebazzz.tweakblogs.net/blog/1071

  26. Many years ago in Channel Islands Harbor Oxnard CA I met the guy that invented this electric bug zapper. At night he would go to the light at the rest rooms where lots of bugs would be and zap them as he tested his invention. Now every time I see one of these I think of him and wonder how he is doing. I hope he is making some money off these 🙂 

  27. can you put 2 or more zappers in series? to get a higher outputvoltage? or would that destroy sth like the capacitor or sth else?

  28. I wanted to know if I can use a wire instead of the aligator clip?

  29. Good video, and well edited.

  30. Where on earth does it get the extra voltage from if the batteries themselves don't supply high voltage?????????? We all know that the extra energy (or volts) cannot simply just come out of nowhere so there must be somewhere that the 1.4 kilovolts are coming from, but like I said: little batteries like those don't supply that many volts to begin with.

  31. I bought one from Home Depot that uses c size batteries and claims up to 3,000 volts . Sound right ???

  32. charging 1400v in a 400v condenser =O

  33. have a 50000volt tazer collecting dust, is it possible to swap them out, creating an incinerator bug swatter? 🙂

  34. Was there an actual voltage rating on the main capacitor–also was it labeled AC or DC? 1400VDc is just what I need for an app but 400V won't work,
    Thanks,

  35. Nice one !!! can i get 12 volts dc output from it . I don't want to use the battery also…

  36. nice video, well explained

  37. How many fly swatters would you require to power a corona motor

  38. I'm trying to make a deterrent to porcupines who climb and destroy my 20+ apple trees. I've seen many mods to the racket on how to make a stun gun but I need to encompass the tree 1ft from ground with a hoop that will deliver a deterrent when activated by its weight trying to climb over it at 360 degrees. I don't know how to wire the hoop to deliver the zap on an enclosed loop?

  39. Hi do you can show us how to conect 5 of that rackets and get like 12kv ? thak you for teacing us >)

  40. can it run a Tesla Model S ?

  41. For Dogs too! 🙂 I have a dog that was being pestered by fleas that she picked up after she was outside and I have one of these
    electric flyswatters and it's hard to use to get a fly into the grid. I was wondering what it would do if it was passed over the dog?
    Well, it will really do a number on fleas since they immediately jump to objects! I would say it pretty well takes care of those pesky
    critters without bothering the dog. If you have gnats it will take care of them too. A regular flyswatter is better for flies but this thing
    is not just a novelty. Thanks for the video and information.

  42. Liam Neeson… is that you?

  43. Looks like you know a bit about high voltage circuits…can you recommend any resources to learn how to work with high voltage? (e.g., at home, microwave transformer/capacitor, tesla coil, etc., not high voltage power lines). I studied physics and have done a lot of low voltage electronics but don't know enough about high voltage to work safely with it.

  44. How does it output 1400V when the capacitor is only rated for 400?
    I've also been wanting to buy one of these and slightly mod the board into a driver for a GM tube, but looking at the circuit there seems to be no component that has a direct influence on the output voltage. I guess it would be better to build my own after all?

  45. If there are less no of electron but they are all moving with high speed does it is said to high voltage and less current

  46. still difficult to understand. i wanna learn how to build a mosquito zipper circuit. (?)

  47. why you did not remove those battery before you disassembling that ……

  48. So the transformer is outputting 1,400 volts? I could use the transformer in a stun gun circuit for the T1 (first) transformer then. Wasn't sure how much voltage was coming out of that.

  49. What would happen if you swapped out the two AA's with a 9v square battery?

  50. I use to swap out the 3.0v Krypton Bulb in my flashlight with a 1.5v bulb, it wouldn't last as long but it was so bright you could see the beam from a long ways away.

  51. I did that but… I spoiled the swatter

  52. How to make electric ion negative generator with mosquito swater circuit plzzz

  53. What was the value of the capacitor? The flyswatter I took apart recently only had a cap rated for 350v. I forgot to discharge the cap once (thinking I was an electronics genius), the zap woke me right up and my throat had dilated :).

  54. May you turn this into a rat killer?

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