In this article we study an RF discharge generation concept also called EMP generator capable of producing an intense RF electrical discharge in the air which may have the potentials of paralyzing and permanently damaging all electronic systems in the close vicinity. The idea was requested by Mr. Nidal.
Contents
Technical Specifications
I have seen a lot of circuits from you in your blog. I am a great fan of you!!!!
If you could help me with a circuit diagram for breaking 2.5 Volt torch bulb (Filament type) when it is switched ON and kept close to a copper pot 6 inches away (distance is between torch and copper pot) with a 12 Volt DC supply.
The thing is that, a switched on torch bulb should blow off when it is kept closer to a "copper pot" kept 6 inches apart. I hope a strong magnetic field will give the result.
But the problem is how to magnetize a copper pot to that extend?, an alternating supply give to a copper pot may develop magnetic flux around it or will it get short circuited?
Is it enough to break lamp filament? Or do I need to wind a copper coil inside that vessel to get that result?
Please help me in solving this issue.
Many thanks and expecting a reply from you soon.
Best regards,
Nidal.
The Design
The proposed concept of fusing a bulb filament through a wireless magnetic field doesn't appear to be feasible, however it could be implemented using a very strong RF discharge, such as from a very high voltage capacitor.
The idea may be carried as given in the following explanation:
A high current low voltage is first stepped up to many kilovolts, then stored inside equivalently rated high voltage capacitors and finally discharged by creating a short circuit across the high voltage capacitor leads.
The resulting discharge will generate an awesome amount RF electricity in the zone which may have the potential of fusing the filament of a bulb or illuminating a fluorescent tube momentarily.
Caution: The EMP discharge could produce devastating effects on all electronic equipment placed within the range of the discharge.
Circuit Diagram
How it Works
Referring to the diagram above, the set up shows a basic capacitive discharge system. The circuit comprising the diodes, C1 and the SCR form a capacitor charge/discharge switching stage which is powered from a boosted AC using a couple of mains transformers.
TR1/ and TR2 transformers are coupled together such that the low voltage TR2 winding connects with the TR1's low voltage winding.
When mains is applied to TR2 primary, an equivalent 220V (low current) is induced across the upper winding of TR1.
This voltage is used for charging the high voltage capacitor C1 in the circuit via a switching SCR stage which is triggered through the 50Hz low voltage input from TR2 via D2.
The switched C1 discharge is applied to the primary of a car ignition coil, which steps up this voltage to a staggering 40,000V or higher.
This voltage is kept hanging across a thin filament position within a suitably dimensioned conical shaped aluminum radiator.
When the shown push button is pressed, the high voltage tries to force its path through the filament creating a massive arc and explosion across the points.
This generates an intense RF disturbance in the region which is further magnified and propagated by the cone to the target which is here a small electrical bulb.
If the discharge is sufficiently strong may produce a momentary illumination of the bulb filament and then fusing due to the generated RF electricity.
Parts List
- R4,R5 = 100 OHMS, 1 WATT
- D1, D2, D3, D4 = 1N4007
- C1 = 100uF/500V,
- SCR = BT151
- TR1/TR2 = 220V/0-12V/1AMP TRANSFORMERS.
SANJOY BHATTACHARJEE the says
How much is the power of this circuit and can it be modified to have much more power? If yes then please provide the schematic.
Swagatam says
The power will depend on the ignition coil power and the transformer power. I have not yet checked the actual power of the system so not sure about it.
Jithu says
Have you done this
Manu Krishnan says
Hi sir, please check your mail.i have been attached a video.
Swagatam says
Hi Manu, I cannot find your email, not even in junk folder
Manu Krishnan says
This is your mail id right???
Swagatam says
Got your email now, what you are showing is basically a Tesla Coil, as given in the image
Manu Krishnan says
Sir thank you soo much.
Sir I need this same method above the one table.i need to fix the device under the table and need the frequency above the table, around 12 Inch frequency ( 360 degree)
We can operate in ac also. How does it possible?? What changes should I do on this??
Please help me
Regards
Manukrishnan.
Swagatam says
Manu, there are many good constructional videos regarding this concept that you can check on YT. I have so far not built a Tesla coil, so I can’t suggest much on this concept.
Jithu says
Have you done this
MOHAMED Hab says
Mr. Swagatam the circuit looks great congrats !
This device can burn Nanobots Without damaging the targeted individual ?
i’ll apreciate your response !!!
Swagatam says
Thank you Mohamed, You are right, the RF has the power to destroy nanobots easily
MOHAMED Hab says
Thanks a lot Mr. Swagatam !!! I Apreciate your answer Sir !!!
Manu Krishnan says
Yes sir ,I think some fault from my side.how can I share that photos with you?
If it possible, you can troubleshoot it. I think some mistake in pcb design or connection.
Swagatam says
Manu, you can send it to my email given in the contact page….if it is possible I will try to find out the fault
Manu Krishnan says
Sir contact page means? In that main page ??
Swagatam says
https://www.homemade-circuits.com/contact/
Manu Krishnan says
Hi sir, please check your mail.i have been attached images.
Regards
Manu
Swagatam says
Hi Manu, I saw your email,but it is difficult to understand the fault by looking at the image. I will suggest you to check the connections exactly as per the following PCB details:
https://www.homemade-circuits.com/wp-content/uploads/2011/12/pcb-CDI.jpg
Also please check the following:
Check the ground connections, and make sure they are correctly connected across the transformers, SCR, ignition coil.
Check the 220V from the output of the transformer which connected to the circuit.
Remove the bigger 100uF capacitor and replace it with a smaller 1uF/400V or 105/400V for the initial testing purpose, remember this capacitor has to be a non-polar.
Manu Krishnan says
Sir, is this rf frequency can pass through a wooden panel ,playwood or plastic ? And how much distance it can fuse this bulb?
Swagatam says
Hi Manu, yes the frequency may be capable of traversing through non-metallic obstacles. Distance will depend on the power of the RF, ignition coil power, supply current voltage specifications
Manu Krishnan says
Ok sir thank you.
How can I increase that power? What should I change ? I need to cover the frequency around 8 inch radius,
Please help me.
Swagatam says
You can change the ignition coil to a bigger one, or use 3 or 4 ignition coils in parallel
Manu Krishnan says
Ok thank you sir,
So I guess need not change capacitor, transformer and other devices.
Now I confused about filament, am trying to take a thin copper from 12 v transformer .is it ok for filament?
Swagatam says
No problem, do not use any filament, just use a 5 mm air gap between the output electrodes. When the spark jumps across these points, a strong RF will be generated in the atmosphere.
Manu Krishnan says
Ok sir,
But one doubt,in this method the bulb will cut off suddenly or slowly?
I mean the bulb will cut off suddenly whenever I switch on the device or bulb will be turning off slowly?
My requirement is, the bulb should get fused slowly like within a 15-25 seconds. And also within s radius of 12 inch atmosphere area.
And also I need to keep the output electrodes behind a playwood or fiber sheet. How to make it practical ??
Please give me suggestion
Thank you
For ur support sir.
Swagatam says
Hi Manu, I won’t be able to provide accurate information about this concept since I have not tested it practically. I can only say that this unit will generate a huge amount of destructive RF whenever a discharge is created at the output. The RF power will depend on the discharge capacitor value and the ignition coil wattage.
Manu Krishnan says
Ok thank you sir,
Anyway I will try this and contact u for further clarification.
Swagatam says
You are welcome Manu!
Saravanan says
Hi i would like to buy this circuit. If you could designs it and sent it i would be happy to pay.
Swagatam says
Sorry, that won’t be possible.
Saravanan says
Sir how to make radio-frequency wireless charger enough Power Range circuit please help sir
Swagatam says
Sravanan, you can read this article:
https://www.homemade-circuits.com/wireless-cellphone-charger-circuit/
Manu Krishnan says
Sir. It’s giving only 160-161 v out from transformer. We need 220v right?
Swagatam says
Manu, 160 V will be enough for most CDI coils, and a output over 20kv can be expected
Manu Krishnan says
Ok, but no output from ignition coil.
Nothing is coming
Swagatam says
Please try the following set up first, and verify the results, afterwards you can increase the rating of the capacitor and the coil for increased output:
https://www.homemade-circuits.com/how-to-make-capacitive-discharge/
Manu Krishnan says
Sir not getting a proper output. Can I mail you the pic of circuit which I made? How can I share you that?
Swagatam says
Manu, if you make the basic CDI design exactly as given in the above article, the circuit will definitely work, that is why I suggested you to build the small CDI circuit first and then upgrade its power rating, once the working is confirmed.
It can be difficult for me to troubleshot your circuit by looking at your wiring diagram….
You can also refer to the the working video of the CDI circuit, in the link which I gave your earlier to get more info regarding the wiring details.
Manu Krishnan says
Sir, very disappointing.not getting any results.am trying to find this secret from last 3 year.please help me to solve this case.
Swagatam says
Manu, I have already provided you all the required information and suggestions, with video proof, if still you are having problems then I am sorry I can’t do much!
Saravanan says
I need a torch bulb to get fused when it comes within the range of 30cm. Same like the above scenario, a pot will be placed. Under the pot this emp device will be hidden. When the people has turned on torch and keep it within 30cm range, the bulb should blew. Its for a magic trick demonstration
Swagatam says
The above circuit is designed for the same purpose. you can try it as explained
Saravanan says
Sir I want to 2.5v trouchlight bulb filament cut off noncontac method
Swagatam says
Sravanan, please explain elaborately so that I can understand the concept correctly!
Sathi says
I will send you some pictures of Rf Circuit .see it sir tell right or wrong .sir please sent me your answer.
Swagatam says
If it’s possible I’ll try to help!
Tony /Smith says
Why on Earth did you put the switch on the secondary of the coil ? That means the switch needs to be rated for at least 40,000 volts, good luck finding one ! Switch the primary ! The 40kv would jump the switch contacts of almost any switch, you might get lucky with the old knife style switch but then you would have 40kv shock hazzard.
Swagatam says
You can put it in series with R4.
Dilin says
I need a torch bulb to get fused when it comes within the range of 30cm. Same like the above scenario, a pot will be placed. Under the pot this emp device will be hidden. When the people has turned on torch and keep it within 30cm range, the bulb should blew. Its for a magic trick demonstration
Swagatam says
That may require a huge amount of RF power, which may not be possible using a car ignition coil. But you can do the trick using a wireless charger circuit. This will not burn the bulb filament but will shut it off at a specific area where the wireless transmitter may be hidden.
Aonebasha says
Please filamenet picture upload sir..
Swagatam says
use a very thin wire for it, 40 SWG
Dilin says
Hi i would like to buy this circuit. If you could designs it and sent it i would be happy to pay.
Swagatam says
Hi, Can you please tell for what purpose you need this equipment, how do you want me to test it?
Sathi says
Strong RF Discharge Circuit diagram as confusing me there is no positive and nagitive simbles are there in diagram.please send me the complete diagram or assembled board pictures or assemble videos.
Swagatam says
The circuit works on AC, and the supply is given from TR1 secondary (220V)
Please read the article to understand the working…
Sathi says
Please give me any suggestions