ThermalRunaway

I have to admit, when I become complacent enough to get a shock off a charged CRT it gets me so wound up I don't want to go near another CRT for the rest of the day - I become over concious of getting another shock!!!

I hate getting CRT shocks.

Brian

t.o.

Don't try on some one who had a heart problem.

HiTech

It makes me want to take a ball pien hammer to the CRT's neck!! In reality we only have ourselves to blame for carelessness. It's not like electricity comes looking for us: "Hey guys, there's a human sitting over there at that desk writing poetry. We're a group of highly motivated, free-running electrons, so what say we play a nasty trick on him?"

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NeoNinja

anyone know of any substitute parts i can use for the mark stoker model? i just finished mine an hour ago using; MOUSER transformer (T1), in4004 diode (d2), TIP 48 transistor (Q1), IN4148 diode (d1) i dunno if thats the same as INJ4148 ?? and both of my capacitors are disc capacitors dunno if that matters or not.. anyways the problem is when i tested this on my voltmeter... it read like 6 volts...? i wanted at least 100v or somthing to give a nice shock like the expected 1800v

chiba

You could always make this with two small motor bike coils for portability, may need checking first.

Anyway, who needs a stun gun when you can be a NINJA http://www.realultimatepower.net/ninja/ninja2.htm

The 75v Zeners should be 1N5374

Attached Images

Twin coil driver.JPG (113.6 KB, 292 views)

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2.4Gigglehurtz

HiTech

That Ninja webpage is absolutely the most ignorant site on the Internet! It's obvious that a dreamy headed pube fabricated it!

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chiba

I tested the circuit above with just the one ignition coil it's about 48KV @ 142hz and gives off a noise that suggest run away, the ozone smell is very strong. Pic taken with older camera just in case

Attached Images

test 1.JPG (14.9 KB, 208 views)

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2.4Gigglehurtz

chiba

I added the second coil and it now jumps 46mm and draws 2.37A @ 12.5V. I suspected the voltage was going to be over 50KV so i am on a hunt for 50 x 10M resistors to add to the 50 i have now, seems every store i go to they have like 5 or 10. There is a way to measure the Voltage with spark gap but you need to make some big sperical electrodes
( http://www.kronjaeger.com/hv/hv/msr/spk/index.html ) for it to be acurate. Any ideas how i can measure this voltage without a 1G resistor or a pair of big balls

Attached Images

test 2.JPG (15.9 KB, 136 views)

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2.4Gigglehurtz

tuna

in vietnam we used to go fishing with this on our own land. what we'd do is stick a 12v battery on our back and go in the water to shock the fish. when they get shocked they will float up and we collect them in a net then eat :P

i dont think its legal over here so i wouldnt try it lol

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	1.JPG (64.9 KB, 192 views)
	2.JPG (57.4 KB, 165 views)

gopu_therock

u r awesomeman!!!!!!!!!!!!!!!!!!!!!!!!!how do ya get these things???????????????

HiTech

You can do the same thing with an AC line cord and two long steel rods stuck a couple of feet apart into dampened ground. The worms wiggle up to the surface, you put them in a container, grab your fishing pole and go catch larger fish than those you pictured. Now you and your family can eat for days to weeks instead of snacking from morning to noon, to supper time.

You gopu_thestore, plop down some money for a stun gun, wait for a day until it rains heavily, then stand in your front yard and activate the thing.

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Hero999

You only need one rod connected to the live wire and make sure you don't have an RCD on the line or it'll trip.

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tuna

there are no big fishes there to catch anyways except from the occassional snake lol

i_build_stuff

I think the schem on the first post is missing a capacitor across the output transistor (from collector to ground, probably a high voltage ceramic in the .1 to 1uF range).

When the transistor turns off, that cap would charge up to way more than the supply voltage (but less than the transistor's max), and then its charge would "bounce" back down through the coil. The voltage will try to shoot right down past ground (*if* you had enough energy in the coil when the transistor turned off--which you hopefully did), where the diode makes it hang at about -1V. While it's stuck there, you turn the transistor back on until the coil is energized again (hence the "zero voltage switching" name).

As it is, there will be really high voltage spikes at that transistor's collector, which may or may not cause reliability problems.

Dr.EM

So thats what it was, lol! I remember when I tried this out, I somehow touched the batteries minus terminal and transitor heatsink tab and actually got a worse shock than at the HV output! I figured it was something to do with the inductance of the primary.

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Will have to make do with myspace now I guess...