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Ask Hackaday: Can you steal a car with a mini tesla coil?. i have had this problem with some homemade circuits where they pick up unexpected signals and trigger when they are not supposed to.


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To start your EMP project, you need a homemade Taser. This can be easily built from that vicious little tourist device above me. Scroll down a bit to find my guide on how to make one. It should literally take around 5 minutes. Familiarize yourself with all the parts on the Camera's circuit board. Now, you will need a few other parts.


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If you want to make a homemade cell phone jammer or blocker, then you have to follow the steps and requirements.
Understand the working principles: 1.
Frequency of Cell Phone Jammer 1.
Use a 45MHz clock oscillator 1.
Know how how to make a homemade slot machine jammer works 3.
Use an old aluminium box and UHF bonus codes 4.
Attach RF connectors to the circuit.
Use a nine volt battery and voltage regulator 6.
Screw the input and output antennas 7.
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Isn’t that cool? When the phone blabber annoys you – turn your jammer on and that wrongdoer will hear own voice in his or her cell phone. Oh, by the way, you can also use this mobile signal jammer to block any cell-based tracking systems which use your GPS to track and record your car’s moves.


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HOW TO MAKE EMP JAMMER[DIY]

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How to Buy a Frequency Jammer on eBay. For individuals building a frequency jammer who need electronic parts or those who simply want to purchase a pre-made jammer or other spy gadget, eBay is the place to start. There are great deals on homemade devices that are both new and used.


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The device is pretty simple.
A spark gap is used to dump a large amount of magic pixies into the coil all at once, which generates a strong enough magnetic pulse to induce an unexpected voltage inside of a piece of digital electronics.
Either from the HVDC converter or the FCC fines.
Video after the break.
An article in a recent issue of QST told of a report of interferance so bad that it disabled nearby cell phones.
It was reported to the FCC, who simply ignored it.
Somewhere a while back I read an article on an area that was experiencing cellular outages at routine intervals, interfering with emergency communications.
Finally turned out to be some old guy with a super powerful cell jammer in his car because he was tired of people driving while on their phones.
Bumping up the voltage helps overcome things like coil resistance, but adding a high voltage capacitor to increase current might help too.
A spectrum analysis would be interesting to show where the bulk of the power resides in the frequency domain.
The spark gap itself is the only thing radiating EM.
The only reason this infernal gadget works is by screwing up this power circuits in his devices with the magnetic induction from that coil.
I knew the spark gap was throwing off interference, but actually have no idea how a sufficiently large EM pulse would be generated.
But still a one way device, as it needs high explosives to work.
The device in this article seems to be more of a poorly understood and tuned spark gap transmitter.
From the spark length of ~1cm you could estimate roughly 20kV.
So to get some higher voltage at least you should add a tesla coil secondary and treat or modify the air core output coil as the primary :- Can need some additional primary capacitance.
This was a nice seconday tesla coil size coil that an expendable component kinda like ammo.
It used a fine silver wire that the would vaporize under the high current.
This part was in a container with a suppressing medium like read more to prevent the plasma from continuing to conduct and make a sharper impulse.
It would make EMPs that actually ruined electronics,not reset them.
With that in mind, this is extra disappointing.
This was based off those.
I believe the intent was for it to be mostly reusable to reduce the cost per use.
I strongly suspect that if you look at the spark gap, the coil, and the stray capacitance you will see oscillation and that this is a broad band, fairly modest, transmitter.
We used to make them in ancient times with an LM305 to regulate 5V and a 7400 chip with the NAND gates connected in a loop to oscillate.
They ran at the max rate the process could handle and the less than squarish waveform had harmonics of all sorts.
It would screw up any broadcast TV and radio within 20 feet or so.
Someone correct me if there is any oscillation.
As far as I know, an EMP is more like a rectangular function or Gaussian pulse.
Your description is almost accurate.
Do not forget the Compton effect and many other factors shown on the following web site.
Equations are in a doctoral Thesis.
This is not very much different from the first radios made.
I would advise against building this.
Think of the people with pacemakers, or other electrical implants.
This is bad mojo… using spark gaps have been outlawed in the US for almost 90 years now for good reason.
Most Tig welding, save aluminium and magnesium, is done with DC.
The spark gap he is referring to is used by the high frequency start circuit…it uses a low power high voltage arc to start the high power voltage welding arc.
Take it a step further — my MIG, TIG, stick AND plasma cutter are all very high power spark gaps!
Technically, it is the spark-gap transmitting radio that was outlawed 90 years ago, not spark-gaps of all kinds.
The reason they were outlawed is because a single one could occupy a huge portion of radio spectrum, and the new at that time vacuum tube based CW transmitters could be tuned much more tightly and therefor caused less interference across the entire radio spectrum in use at that time, allowing for more particularly commercial users in the same amount of spectrum.
Source: 400 Meters and Down by Clinton DeSoto as far as I remember it.
Which is what his doc told him.
The conducting plasma behaves as a negative resistance and excites parasitic tuned circuits.
In a spark gap transmitter this is the primary function.
But how to tell the hot plasma in how to make a homemade slot machine jammer welding arc not to do this?
Probably the Q is lower, so it is more wideband noise.
The most important part: In a spark gap transmitter, a lot of the design goes into blowing the plasma away and interrupting the spark.
A hot plasma has a fairly low resistance and will remain conducting between bingoroom bonus code 120 pulses per second from a 60Hz AC please click for source welder.
So some noise, yes, but strong oscillations, no.
In the first, the ringing oscillation occurs during the first part of the presence of the arc.
In the second, the ringing oscillation only starts when the arc goes out.
Nikola Tesla designed spark gaps that used a magnetic field created by the current to blow the arc out.
Rotary spark gaps break the arc by moving the points away from each other.
Sometimes compressed air is used.
Or a couple of permanent magnets set up a field across the arc, forcing the arc out of the gap as it forms.
Driving it for what purpose?
If you merely want to activate a solenoid or relay, you must put a diode across the coil to absorb the current when the coil is switched off.
This could be the answer to my prayers will this knock out car stereos?
Looking for a hack to knock them out for assholes who blast car radios outside a nuisance business at all hours.
Or for more fun to prove your point pull out a water pistol and rigorously spray their vehicle, when the laughing starts hold up a can of Polystripper in the other hand, grin and drive off … of course dont actually use the paint stripper as mostly death from llead particles appearing in and around your head may shorten your funtime.
By virtue of imprecicely introducing glitches at range … Ive read about these being used on this web page machines to mess up the bill counter, giving extra credits to the player.
Well, 30 years ago we would epoxy a string to the side of a coin to get free phone time.
This worked all the way through university.
Flat rate killed it.
Interesting point is could never get it to work on pinball machines.
Few days ago someone asked on the electronics forum I visit how to make such a device, named slot machine jammer.
It was just a single transistor CW transmitter with loosely coupled antenna via transformer wound over two 9V batteries.
It actually works on some slot machines.
If they are at least 20 years old.
On related note I tested once zapping old payphone with piezoelectric lighter to get free calls.
Worked only with very old one that had classic dial — one had to remove cover from it and zap the screw that connected dial to internal mechanism… Useful for inducing pulses onto the coin mechanism wiring in Arcade machines….
The guy rushed the maths part, took some parts from an old washing machine and followed some sketches he found on the internet.
After assembled, he put his custom EMP device near a wall of his improvised workshop, then he put an old magnetic band card right in front of the EMP device to see if It can destroy the info on the card and took away to a safe distance every electronic device he had on the room.
Yes, the guy lived in a flat and forgot that the how to make a homemade slot machine jammer room of his neighbour was in the other side of the wall where he put the EMP device.
That was his first and last DIY EMP, he realized how dangerous It was and he thanked god nobody with a peacemaker were in the surrondings.
His neighbour never knew about the EMP and thought his new plasma TV broke due a manufacture defect.
Erase a few credit cards, sure.
Fry electronics, not a chance.
This is somehow inconsistent.
Why should the casing be made of expensive metal to prevent the escape of the magnetic field of the voice coil drive, while the platters INSIDE the casing could use protection?
The field of the magnets of the voice coil drive is mostly confined between the magnets, where it can do its work together with coil.
There is no other shielding except a quite close magnetic circuit made of steel.
I still would not believe the story about fried HDs or TVs.
A cheap magnetic card sure.
I had data loss on a ski-lift-card one time, because the wind bounced it around over the speaker of my cellphone.
Part of the reason the magnetic field is strongest between the magnets is because the magnetic shielding shunts the other half of the dipole.
The field is mostly contained between the two poles.
Not due to magnetic shielding.
It is not required in this application due to the heads only sensing sharply how to make a homemade slot machine jammer fields, and the head coil amplifiers rejecting low frequency changes.
Modern GMR heads are more sensitive to external fields, but as data densities increase, so does the frequency of the field changes, so the lower frequencies are easier to filter out.
You just increased the voltage 10 fold to the advertisment :- why not 100000kV?
Looks to me like a design that works by accident and not in the intended manor You want to insert a capacitor to bump up your current, tune your coil and shield your electronics Looks to me like the spark gap is doing all the work and the coil is just acting like a click resistor … Looks legit to me.
Keyed on creates a pulse that gets transformed up to high voltage, sparks, and the broadband signal is passed through an LC tank, radiating away out the antenna while it rings down.
But we have a lot mellower ways of making short bursts of broadband these days, so the spark is probably a waste of time except as far as it looks cool.
That must sound wierd.
I believe to see an interrupter like a doorbell.
So the coil produces HV and the transmitter RF as long as the key is depressed.
This is why you need to go to uni and do engineering.
Anyone with a base knowledge of electronics knows that this wont do fuck.
I mean we can dump a pt with one of these in an MRI with appropriate settings and all is fine.
You want to see EMP?
Try dousing an MRI.
I always mused that Maths is short for Mathematics.
Hm… This seems way weaker then actually going to the lab and apply EN 61000-4 EMI to your devices.
I found a while back that a simple regular photoflash can mess up devices, specifically cheap calculators.
Its interesting to note that my idea of a simple LED based photosensitivity tester based around LED strips harvested from old broken laptop panels could work here, simply put a low value resistor across each 4 LED bar to reduce the intrinsic capacitance and achieve minimum pulse width.
If you covered the voltage regulator with opaque paint, it was not vulnerable any more.
At that price I was tempted to order ten.
Parallel them up with a big capacitor and make a light weight power supply for tesla coils extra.
Magic pixies have yet to be seen.
I suspect a layer of aluminum foil would shield most everything from the effects of similar devices.
The trunk of a car would be a very effective shield as well.
Funny how he claims it generates EMP without a single measurement of magnetic pulses.
Or do you mean 1000000000000000000 fV?
The metric system prefixes are there for a reason.
This is basically a bug zapper, it wont cause a problem to people with pacemakers as the range will only be 5 cm, I know people who use these on their pay meters, it blanks the Lcd display so they get free electric.

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Make EMP Jammer. To make EMP jammer you require, a high voltage generator, coil, and switch. You can find the block diagram below. In the block diagram, you can see a gap in one wire, it is called as the spark gap. As our need is to generate pulses this spark gap is used.


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How to build a mini-EMP generator to disrupt electronics - Electronic Products
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Destroy Any Device With EMP Jammer: Imagine that you have powers to stop any electronic device, is it only possible in movies?well here's the way to make an emp jammer (Electromagnetic pulse jammer)This device sends high amplitudes of emp to destroy nearby devices, be sure to have f...


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Attention we are not ing a jammer or other illegal device security and alarm for protecting machines 2018 emp jammer slot machine ocean king malaysia wukong Emp Generator Electronic Magic Pulse Bulb TesterSlot Machine Remote Jackpotter Christmas WiesbadenEmp Generator Electronic Magic Pulse Bulb TesterDevices S SlotsBest Slot Machine Jammer Java VegasHow To Make An Emp […]


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An EMP generator would not 'increase' money when used near a slot/vending machine, it would just cause the machine to fuck up and die not to start adding money. Vending machines / slots machines dont fail open otherwise you would just be able to unplug them and snacks would fall out.


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How to make EMP Jammer - Electronics Projects Hub
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If you want to make a homemade cell phone jammer or blocker, then you have to follow the steps and requirements.
Understand the working principles: 1.
Frequency of Cell Phone Jammer 1.
Use a 45MHz clock oscillator 1.
Know how to make a homemade slot machine jammer it works 3.
Use an old aluminium box and UHF connectors 4.
Attach RF connectors to the circuit.
Use a nine volt battery and voltage regulator 6.
Screw the input and output antennas 7.
If you want to buy a mobile phone jammer, network jammer, signal jammer or blocker, etc.

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A slot for insertable. inspecting the machine to make sure the vote had been completed and the machine is free of any. Jammer P/D/$$ Swap. I/ND/$ Break/Damage.


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How to Make an EMP Jammer: An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy. Such a pulse may occur in the form of a radiated electric or magnetic field or conducted electrical current.


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The device is how to make a homemade slot machine jammer simple.
A spark gap is used to dump a large amount of magic pixies into the coil all at once, which generates a strong enough magnetic pulse to induce an unexpected voltage inside of a piece of digital electronics.
Either from the HVDC converter or the FCC fines.
Video after the break.
An article in a recent issue of QST told of a report of interferance so bad that it disabled nearby cell phones.
It was reported to the FCC, who simply ignored it.
Somewhere a while back I read an article on an area that was experiencing cellular outages at routine intervals, interfering with emergency communications.
Finally turned out to be some old guy with a super powerful cell jammer in his car because he was tired of people driving while on their phones.
Bumping up the voltage helps overcome things like coil resistance, but adding a high voltage capacitor to increase current might help too.
A spectrum analysis would be interesting to show where the bulk of the power resides in the frequency domain.
The spark gap itself is the only thing radiating EM.
The only reason this infernal gadget works is by screwing up this power circuits in his devices with the magnetic induction from that coil.
I knew the spark gap was throwing off interference, but actually have no idea how a sufficiently large EM pulse would be generated.
But still a one way device, as it needs high explosives to work.
The device in this article seems to be more of a poorly understood and tuned spark gap transmitter.
From the spark length of ~1cm you could estimate roughly 20kV.
So to get some higher voltage at least you should add a tesla coil secondary and treat or modify the air core output coil as the primary :- Can need some additional primary capacitance.
This was a nice seconday tesla coil size coil that an expendable component kinda like ammo.
It used a fine silver wire that the would vaporize under the high current.
This part was in a container with a suppressing medium like sand to prevent the plasma from continuing to conduct and make a sharper impulse.
It would make EMPs that actually ruined electronics,not reset them.
With that in mind, this is extra disappointing.
This was based off those.
I believe the intent was for it to be mostly reusable to reduce the cost per use.
I strongly suspect how to make a homemade slot machine jammer if you look at the spark gap, the coil, and the stray capacitance you will see oscillation and that this is a broad band, fairly modest, transmitter.
We used to make them in ancient times with an LM305 to regulate 5V and a 7400 chip with the NAND gates connected in a loop to oscillate.
They ran at the max rate the how to make a homemade slot machine jammer could handle and the less than squarish waveform had harmonics of all sorts.
It would screw up any broadcast TV and radio within 20 feet or so.
Someone correct me if there is any oscillation.
As far as I know, an EMP is more like a rectangular function or Gaussian pulse.
Your description is almost accurate.
Do not forget the Compton effect and many other factors shown on the following web site.
Equations are in a doctoral Thesis.
This is not very much different from the first radios made.
I would advise against building this.
Think of the people with pacemakers, or other electrical implants.
This is bad mojo… using spark gaps have been outlawed in the US for almost 90 years now for good reason.
Most Tig welding, save aluminium and magnesium, is done with DC.
The spark gap he is referring to is used by the high frequency start circuit…it uses a low power high voltage arc to start the high power voltage welding arc.
Take it a step further — my MIG, TIG, stick AND plasma cutter are all very high power spark gaps!
The reason they were outlawed is because a single one could occupy a huge portion of radio spectrum, and the new at that time vacuum tube based CW transmitters could be tuned much more tightly and therefor caused less interference across the entire radio spectrum in use at that time, allowing for more particularly commercial users in the same amount of spectrum.
Source: 400 Meters and Down by Clinton DeSoto as far as I remember it.
Which is what his doc told him.
The conducting plasma behaves as a negative resistance and excites parasitic tuned circuits.
In a spark gap transmitter this is the primary function.
But how to tell the hot plasma in a welding arc not to do this?
Probably the Q is lower, so it is more wideband noise.
The most important part: In a spark gap transmitter, a lot how to make a homemade slot machine jammer the design goes into blowing the plasma away and interrupting the spark.
A hot plasma has a fairly low resistance and will remain conducting between the 120 pulses per second from a 60Hz AC arc welder.
So some noise, yes, but strong oscillations, no.
In the first, the ringing oscillation occurs during the first part of the presence of the arc.
In the second, the ringing oscillation only starts when the arc goes out.
Nikola Tesla designed spark gaps that used a magnetic field created by the current to blow the arc out.
Rotary spark gaps break the arc by moving the points away from each other.
Sometimes compressed air is used.
Or a couple of permanent magnets set up a field across the arc, forcing the arc out of the gap as it forms.
Oh and because it was Arduino driven you can imagine the fun there.
Driving it for what purpose?
If you merely want to activate a solenoid or relay, you must put a diode across the coil to absorb the current when the coil is switched off.
This could be the answer to my prayers will this knock out car stereos?
Looking for a hack to knock them out for assholes who blast car radios outside a nuisance business at all hours.
Or for more fun to prove your point pull out a water pistol and rigorously spray their vehicle, when the laughing starts hold up a can of Polystripper in the other hand, grin and drive off … of course dont actually use the paint stripper as mostly death from llead particles appearing in and around your head may shorten your necessary grid bonus codes ps3 speed boost valuable />By virtue of imprecicely introducing glitches at range … Ive read about these being used on gambling machines to mess up the bill counter, giving extra credits to the player.
Well, 30 years ago we would epoxy a string to the side of a coin to get free phone time.
This worked all the way through university.
Flat rate killed it.
Interesting point is could never get it to work on pinball machines.
Few days ago someone asked on the electronics forum I visit how to make such a device, named slot machine jammer.
It was just a single transistor CW transmitter with loosely coupled antenna via transformer wound over two 9V batteries.
It actually works on some slot machines.
If they are at least 20 years old.
On related note I tested once zapping old payphone with piezoelectric lighter to get free calls.
Worked only with very old one that had classic dial — one had to remove cover from it and zap the screw that connected dial to internal mechanism… Useful for inducing pulses onto the coin mechanism wiring in Arcade machines….
The guy rushed the maths part, took some parts from an old washing machine and followed some sketches he found on the internet.
After assembled, he put his custom EMP device near a wall of his improvised workshop, then he put an old magnetic band card right in front of the EMP device bonus codes mtn latest see if It can destroy the info on the card and took away to a safe distance every electronic device he had on the room.
Yes, the guy lived in a flat and forgot that the living room of his neighbour was in the other side of the wall where he put the EMP device.
That was his first and last DIY EMP, he realized how dangerous It was and he thanked god nobody with a peacemaker were in the surrondings.
His this web page never knew about the EMP and thought his new plasma Https://us-park.info/bonus-codes/razer-bonus-code.html broke due a manufacture defect.
Erase a few credit cards, sure.
Fry electronics, not a chance.
This is somehow inconsistent.
Why should the casing be made of expensive metal to prevent the escape of the magnetic field of the voice coil drive, while the platters INSIDE the casing could use protection?
The field of the magnets of the voice coil drive is mostly confined between the magnets, more info it can do its work together with coil.
There is no other shielding except a quite close magnetic circuit made of steel.
I still would not believe the story about fried HDs or TVs.
A cheap magnetic card sure.
I had data loss on a ski-lift-card one time, because the wind bounced it around over the speaker of my read article />Part of the reason the magnetic field is strongest between the magnets is because the magnetic shielding shunts the other half of the dipole.
The field is mostly contained between the two poles.
Not due to magnetic shielding.
It is not required in this application due to the heads only sensing sharply alternating fields, and the head coil amplifiers rejecting low frequency changes.
Modern GMR heads are more sensitive to external fields, but as data densities increase, so does the frequency of the field changes, so the lower frequencies are easier to filter out.
It looks similar to a spark gap transmitter from 1887 illegal in most countries due to EMI since about 1917 Thankfully with the antenna chopped off and the high voltage capacitor removed.
You just increased the voltage 10 fold to the advertisment :- why not 100000kV?
Looks to me like a design that works by accident and not in the intended manor You want to insert a capacitor to bump up your current, tune your coil and shield your electronics Looks to me like the spark gap is doing all the work and the coil is just acting like a big resistor … Looks legit to me.
Keyed on creates a pulse that gets transformed up to high voltage, sparks, and the broadband signal is passed through an LC tank, radiating away out the antenna while it rings down.
But we have a lot mellower ways of making short bursts of broadband these days, so the spark is probably a waste of time except as far as it looks cool.
That must sound wierd.
I believe to see an interrupter like a doorbell.
So the coil produces HV and the transmitter RF as long as the key is depressed.
This is why you need to go to uni and do engineering.
Anyone with a base knowledge of electronics knows that this wont do fuck.
I mean link can dump a pt with one of these in an MRI with appropriate settings and all is fine.
You want to see EMP?
Try dousing an MRI.
I always mused that Maths is short for Mathematics.
Hm… This seems way weaker then actually going to the lab and apply EN 61000-4 EMI to your devices.
I found a while back that a simple regular photoflash can mess up devices, specifically cheap calculators.
Its interesting to note that my idea of a simple LED based photosensitivity tester based around LED strips harvested from old broken laptop panels could work here, simply put a low value resistor across each 4 LED bar to reduce the intrinsic capacitance and achieve minimum pulse width.
If you covered the voltage regulator with opaque paint, it was not vulnerable any more.
At that price I was tempted to order ten.
Parallel them up with a big capacitor and make a light weight power supply for tesla coils extra.
Magic pixies have yet to be seen.
I suspect a layer of aluminum foil would shield most everything from the effects of similar devices.
The trunk of a car would be a very effective shield as well.
Funny how he claims it generates EMP without a single measurement of magnetic pulses.
Or do you mean 1000000000000000000 fV?
The metric system prefixes are there for a reason.
This is basically sunset bonus codes bug zapper, it wont cause a problem to people with pacemakers as the range will only be 5 cm, I know people who use these on their pay meters, it blanks the Lcd display so they get free electric.

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Learn how you can make a EMP Jammer to hack a Vending Machine or Slot Machine Easily. ★☆★ Steps to make your own emp jammer 1. Buy the High voltage Generator from the links below. 2. Make an spark gap (as i shown in video) 3.


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How to Make an EMP Jammier Using a Flashlight

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The reason is that the government leases out frequency bands to various groups (cell phone companies, TV stations, radio stations), etc. If you build a powerful enough cell phone jammer, you're interfering with the cell phone company's right - they purchased that frequency and you didn't. It's essentially the same issue with pirate radios.


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Make EMP Jammer to Hack Any Slot Machine | Project with Video
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The Easiest Way to Make Your Own Cell Phone Jammer - wikiHow
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how to make a homemade slot machine jammer

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In the early days of slot clubs, a dollar played in a video poker machine earned as many comps/points as a dollar played through a reel-spinning slot machine. Those days are long gone now and it might take two, three or even more times as much play through a video poker machine to earn the same level of comps as on a slot.


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how to make a powerful slot machine jammer - YouTube
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The device is pretty simple.
A spark gap is used to dump a large amount of magic pixies into the coil all at once, which generates a strong enough magnetic pulse to induce an unexpected voltage inside of a piece of digital electronics.
Either from the HVDC converter or the FCC fines.
Video after the break.
An article in a recent issue of QST told of a report of interferance so bad that it disabled nearby cell phones.
It was reported to the FCC, who simply ignored it.
Somewhere a while back I read an article on an area that was experiencing cellular outages at routine intervals, interfering with emergency communications.
Finally turned out to be some old guy with a super powerful cell jammer in his car because he was tired of people driving while on their phones.
Bumping up the voltage helps overcome things like coil resistance, but adding a high voltage capacitor to increase current might help too.
A spectrum analysis would be interesting to show where the bulk of the power resides in the frequency domain.
The spark gap itself is the only thing radiating EM.
The only reason this infernal gadget works is by screwing up this power circuits in his devices with the magnetic induction from that coil.
I knew the spark gap was throwing off interference, but actually have no idea how a sufficiently large EM pulse would be generated.
But still a one way device, as it needs high explosives to work.
The device in this article seems to be more of a poorly understood and tuned spark gap transmitter.
From the spark length of ~1cm you could estimate roughly 20kV.
So to get some higher voltage at least you should add a tesla coil secondary and treat or modify the air core output coil as the primary :- Can need some additional primary capacitance.
This was a nice seconday tesla coil size coil that an expendable component kinda like ammo.
It used a fine silver wire that the would vaporize under the high current.
This part was in a container with a suppressing medium like sand to prevent the plasma from continuing to conduct and make a more info impulse.
It would make EMPs that actually ruined electronics,not reset them.
With that in mind, this is extra disappointing.
This was based off those.
I believe the intent was for it to be mostly reusable to reduce the cost per use.
I strongly suspect that if you look at the spark gap, the coil, and the stray capacitance you will see oscillation and that this is a broad band, fairly modest, transmitter.
We used to make them in ancient times with an LM305 to regulate 5V and a 7400 chip with the NAND gates connected in a loop to oscillate.
They ran at the max rate the process could handle and the less than squarish waveform had harmonics of all sorts.
It would screw up any broadcast TV and radio within 20 feet or so.
Someone correct me if there is any oscillation.
As far as I know, an EMP is more like a rectangular function or Gaussian pulse.
Your description is almost accurate.
Do not forget the Compton effect and many other factors shown on the following web site.
Equations are in a doctoral Thesis.
This is not very much different from the first radios made.
I would advise against building this.
Think of the people with pacemakers, or other electrical implants.
This is bad mojo… using spark gaps have been outlawed in the US for almost 90 years now for good reason.
Most Tig welding, save aluminium and magnesium, is done with DC.
The spark gap he is referring to is used by the high frequency start circuit…it uses a low power high read more arc to start the high power voltage welding arc.
Take it a step further — my MIG, TIG, stick AND plasma cutter are all very high power spark gaps!
Technically, it is the spark-gap transmitting radio that was outlawed 90 years ago, not spark-gaps of all kinds.
The reason they were outlawed is because a single one could occupy a huge portion of radio spectrum, and the new at that time vacuum tube based CW transmitters could be tuned much more tightly and therefor caused less interference across the entire radio spectrum in use at that time, allowing for more particularly commercial users in the same amount of spectrum.
Source: 400 Meters and Down by Clinton DeSoto as far as I remember it.
Which is what his doc told him.
The conducting plasma behaves as a negative resistance and excites parasitic tuned circuits.
In a spark gap transmitter this is the primary function.
But how to tell the hot plasma in a welding arc not to do this?
Probably the Q is lower, so it is more wideband noise.
The most important part: In a spark gap 680 codes, a lot of the design goes into blowing the plasma away and interrupting the spark.
A hot plasma has a fairly low resistance and will remain conducting between the 120 pulses per second from a 60Hz AC arc welder.
So some noise, yes, but strong oscillations, no.
In the first, the ringing oscillation occurs during the first part of the presence of the arc.
In the second, the ringing oscillation only starts when the arc goes out.
Nikola Tesla designed spark gaps that used a magnetic field created by the current to blow the arc out.
Rotary spark gaps break the arc by moving the points away from each other.
Sometimes compressed air is used.
Or a couple of permanent magnets set up read more field across the arc, forcing the arc out of the gap as it forms.
Oh and because it was Arduino driven you can imagine the fun there.
Driving it for what purpose?
If you merely want to activate a solenoid or relay, you must put a diode across the coil to absorb the current when the coil is switched off.
This could be the answer to my prayers will continue reading knock out car stereos?
Looking for a hack to knock them out for assholes who blast car radios outside a nuisance business at all hours.
Or for more fun to prove your point pull out a water pistol and rigorously spray their vehicle, when the laughing starts hold up a can of Polystripper in the other hand, grin and drive off … of course dont actually use the paint stripper as mostly death from llead particles appearing in and around your head may shorten your funtime.
By virtue of imprecicely introducing glitches at range … Ive read about these being used on gambling machines to mess up the bill counter, giving extra credits to the player.
Well, 30 years ago we would epoxy a string to the side slot village bonus a coin to get free phone time.
This worked all the way through university.
Flat rate killed it.
Interesting point is could never get it to work on pinball machines.
Few days ago someone asked on the electronics forum I visit how to make such a device, named slot machine jammer.
It was just a single transistor CW transmitter with loosely coupled antenna via transformer wound over two 9V batteries.
It actually works on some slot machines.
If they are at least 20 years old.
On related note I tested once zapping old payphone with piezoelectric lighter to get free calls.
Worked only with very old one that had razer bonus dial — one had to remove cover from it and zap the screw that connected dial to internal mechanism… Useful for inducing pulses onto the coin mechanism wiring in Arcade machines….
The guy rushed the maths part, took some parts from an old washing machine and followed some sketches he found on the internet.
After assembled, he put his custom EMP device near a wall of his improvised workshop, then he put an old magnetic band card right in front of the EMP device to see if It can destroy the info on the card and took away to a safe distance every electronic device he had on the room.
Yes, the guy lived in a flat and forgot that the living room of his neighbour was in the other side of the wall where he put the EMP device.
That was his how to make a homemade slot machine jammer and last DIY EMP, he realized how dangerous It was and he thanked god nobody with a peacemaker were in the surrondings.
His neighbour never knew about the EMP entertaining 5dimes bonus code well! thought his new plasma TV broke due a manufacture defect.
Erase a few credit cards, sure.
Fry electronics, not a chance.
This is somehow inconsistent.
Why should the casing be made of expensive metal to prevent the escape of the magnetic field of the voice coil drive, while the platters INSIDE the casing could use protection?
The field of the magnets of the voice coil drive is mostly confined between the magnets, where it can do its work together with coil.
There is no other shielding except a quite how to make a homemade slot machine jammer magnetic circuit made of steel.
I still would not believe the story about fried HDs or TVs.
A cheap magnetic card sure.
I had data loss on a ski-lift-card one time, because the wind bounced it around over the speaker of my cellphone.
Part of the reason the magnetic field is strongest between the magnets is because the radio codes calgary shielding shunts the other half of the dipole.
The field is mostly contained between the two poles.
Not due to magnetic shielding.
It how to make a homemade slot machine jammer not required in this application due to the heads only sensing sharply alternating fields, and the head coil amplifiers rejecting low frequency changes.
Modern GMR heads are more sensitive to external fields, but as data densities increase, so does the frequency of the field changes, so the lower frequencies are easier to filter out.
It looks similar to a spark gap transmitter from 1887 go here in most countries due to EMI since about 1917 Thankfully with the antenna chopped off and the high voltage capacitor removed.
You just increased the voltage 10 fold to the advertisment :- why not 100000kV?
Looks to me like a design that works by accident and not in the intended manor You want to insert a capacitor to bump up your current, tune your coil and shield your electronics Looks to me like the spark gap is doing all the work and the coil is just acting like a big resistor … Looks legit to me.
Keyed on creates a pulse that gets transformed up to high voltage, sparks, and the broadband signal is passed through an LC tank, radiating away out the antenna while it rings down.
But we have a lot mellower ways of making short bursts of broadband these days, so the spark is probably a waste of time except as far as it looks cool.
That must sound wierd.
I believe to see an interrupter like a doorbell.
So the coil produces HV and the transmitter RF as long as the key is depressed.
This is why you need to go to uni and do engineering.
Anyone with a base knowledge of electronics knows that how to make a homemade slot machine jammer wont do fuck.
I mean we can dump a pt with one of these in an MRI with appropriate settings and all is fine.
You want to see EMP?
Try dousing an MRI.
I always mused that Maths is short for Mathematics.
Hm… This seems way weaker then actually going to the lab and apply EN 61000-4 EMI to your devices.
I found a while back that a simple regular photoflash can mess up devices, specifically cheap calculators.
Its interesting to note that my idea of a simple LED based photosensitivity tester based around LED strips harvested from old broken laptop panels could work here, simply put a low value resistor across each 4 LED bar to reduce the intrinsic capacitance and achieve minimum pulse width.
If you covered the voltage regulator with opaque paint, it was not vulnerable any more.
At that price I was tempted to order ten.
Parallel them up with a big capacitor and make a light bookmakers bonus code power supply for tesla coils extra.
Magic pixies have yet to be seen.
I suspect a layer of aluminum foil would shield most everything from the effects of similar devices.
The trunk of a car would be a very effective shield as well.
Funny how he claims it generates EMP without a single measurement of magnetic pulses.
Or do you mean 1000000000000000000 fV?
The metric system prefixes are there for a reason.
This is basically a bug zapper, it wont cause a problem to people with pacemakers as the range will only be 5 cm, I know people who use these on their pay meters, it blanks the Lcd display so they get free electric.