I'm sure the matter of the weight and space of spring loading chambers came up last time this was discussed. Especially with significant size chambers not the millilitre volumes in a single stroke air rifle. In addition do you not get a much more space efficient result by using a larger precharged c...

http://img199.imageshack.us/img199/6406/tmp2fc.jpg http://img560.imageshack.us/img560/5451/tmpaj.jpg This is just a tiny one, about as thick as an AA battery. There was one about 4 times as thick eating a frog in the pond the other week :shock: Well at least it was until the frogs screaming distres...

Any chance of a video?

As a first stage of a jellybaby yes but not on its own. It has a oscillator to bump up battery power to a few hundred volts then two voltage doublers after that. Output is a few thousand volts at most, jump maybe 1mm. However if you use that few thousand volts to charge a capacitor in series with a ...

Hello again :) I'm a UK deserter but honestly I don't make much of an appearance here anymore. Mostly lurk. Lost interest mostly because I can't fire cannons round here much. I'm currently about due to motivation to write up guides on making jellybabies (remember the code :D) out of disposable camer...

Funny you should mention SIDACs I've been doing some rummaging and I've got some in the mail as we speak. They trip at about the same voltage as the gas discharge tubes I'm using. I've also ordered more caps because although I said the one in the clip is 400V it's actually 1000V and thus larger than...

Find a decent component supplier and rummage in their surge protection category.

I buy mine in packs of 5 from an online catalogue.

Every board has a charging circuit and so can be used. However if you do not have the EXACT circuit pattern board then it won't be any good cutting a corner off it. Check the back of the board, if the corner looks EXACTLY the same as the one I demonstrate then you're good to go. If you're not sure p...

Well you can cut the circuit board with a hacksaw but a dremel in a steady hand is preferable.

The board isn't exactly big so a small fast cutting tool is less likely to cause problems.

I suggest you go to the top of this thread and work your way through the guide.

You're asking the question that this thread answers.

Yes. They'd arc a gap of a fraction of 1 millimetre. Take it from me that's a bitch to get the gap right and it's no good for anything either. By removing the capacitor and not adding a second stage you are merely getting the several hundred volts from the charging circuit. @MrCrowley, cheers for th...

What, the soldering two nails to a camera and poking people one?

Or the one where you hack the circuit, replace the capacitor, add a spark gap and high voltage coil?

This is not a monkeys guide to smash a camera, solder two nails to the 300V capacitor, call it a stun gun, poke people with it and get suspended from school. This is the guide to make a device which runs on a battery and produces sparks at tens of thousands of volts very rapidly. You can do a lot of...

@hotwired, where did you get that potted coil? what size capacitor are you using instead of the main photoflash one? And because it's semi-relevent to the OP, what exactly is the coil that appears in this video ? The coil was from a quad bike CDI unit. The circuit of the unit was not of use to me s...

Also, when you say blunderbuss, do you mean you actually with a conical bore? Aside from being difficult to make, that would be terribly inefficient. I would stay with a cylindrical bore and just flare out the muzzle slightly. I can't recall where but I believe I've read that the gunsmiths knew tha...