Intermediate Stun Gun - Page 7 - Electronic Circuits Projects Diagrams Free

audioguru · 30th November 2006, 08:17 PM

There must be a lot of friction in a rifle. Has one been made with its barrel and the bullets covered with teflon? Then you could shoot bullets into orbit and they would go through nearly anything.

HiTech · 30th November 2006, 08:30 PM

Lots of studies have been done regarding bullet coatings and barrel treatments. Either they are way to expensive for the avg. gun owner, don't last for long under the heat of firing, or diminish barrel life. Molybdenum is the best choice for bullet coatings but once a new barrel has seen it, the shooter should continue using it since on a molecular scale, the particles fuse to the barrel steel. There's alot more science to it than what I present here. There are dry lubricants applied to bullets as well. Barrel fouling is the most prevalent concern and that could affect shot accuracy. Here's a little snip about various bullet types as well as the special procedures for cleaning barrels that fire moly-coated bullets. So the diea of highly reduced friction between barrel and slug is not as desirable as you would think. I remember reading about some theory where if an astronaut were to fire a pistol downward on the moon, he'd sail into orbit.... that is if he doesn't shoot off his foot first, puncturing his pressurized suit!!

http://www.bergerbullets.com/tech-info.htm

If you were to take a proper sized slug and push it into a rifled barrel, you'd be amazed at what force is needed to manually push it through against the rifling (lands). Between the specific amount of friction necessary to rotate a bullet so it can maintain long range flight accuracy along with hot gases from the charge, barrels become hot very quickly and avg. quality ones will change the POI (point of impact). Good match grade barrels reduce these effects. Military grade barrels can withstand tens of thousands of shots before they wear out. Very high-grade sniper barrels have short lifespans in trade for extreme accuracy where only a few shots would be fired at a time... if that. Remember their motto: "one shot, one kill".

chiba · 4th December 2006, 07:49 AM

How'z this for a stun gun, f'ckin blam!

HiTech · 5th December 2006, 01:04 PM

WTH is he shooting? We have flame throwers that emit larger flames than that thing.

chiba · 6th December 2006, 08:16 AM

It's a Blunderbuss

vaibhav007 · 7th December 2006, 03:04 PM

Quote:

Originally Posted by ElectroMaster

This stun gun is powered by a 9V battery. The transformer steps up the voltage to about 1800V (but with very low current). A 555 timer IC is used to generate a high-frequency output. A 1 MEG variable resistor can also be used at the output to drop the voltage, but this is optional. If you build this circuit, be careful, as it outputs a high voltage. Touching the output leads will induce a painful shock.

NOTE: Building stun guns can be very dangerous! Please use caution.

given transformer is outdated.giv alternative.

Hero999 · 7th December 2006, 06:22 PM

Most little mains transformers will work. I recommend a 6V to 240V mains transformer.

leglesslizard · 16th December 2006, 06:12 PM

Hey guys have built the circuit and i only get a shock on the output when i release the switch, i.e. i assume when the capacitors discharge but am not sure. Any ideas why this is doing this or is this right? I thought the shock should pulse, if it doesnt any easy ideas on how to make it pulse? cheers

audioguru · 16th December 2006, 06:43 PM

Isn't a legless lizard a snake? Welcome to our forum.

The 555 is supposed to oscillate. Yours doesn't.

leglesslizard · 16th December 2006, 11:16 PM

yeah nearly, you wouldnt know the difference by looking, but be warned it is there.
ok cheers any ways to resolve this? the 555 has been changed and im not sure why the circuit is not working really. how could i make it oscillate?

audioguru · 16th December 2006, 11:24 PM

If your diodes are backwards then the circuit will have your problem.

leglesslizard · 17th December 2006, 06:32 AM

they are round the right way, any more ideas? im not great with electronics and so am pretty stumped.

audioguru · 17th December 2006, 01:14 PM

Maybe your battery isn't strong enough. Its TIP31 power transistor conducts a lot of current from a brand new 9V alkaline battery that might last a few minutes. Get a new battery.

Hero999 · 17th December 2006, 03:07 PM

Perhaps yout 555 isn't working, try another one.

Have you measure the battery voltage using a multimeter?

leglesslizard · 17th December 2006, 03:41 PM

ive now got two batteries in series, dunno if thats wise the shocks bigger but is still only when you release the switch. So its still not oscillating. And yeah ive changed the 555 twice now still no luck. I am rebuilding it with slightly different bits, will let ya know if that one works. Still any ideas for why this one isnt working are appreciated

30th November 2006, 08:17 PM	(permalink)
audioguru Experienced Member	There must be a lot of friction in a rifle. Has one been made with its barrel and the bullets covered with teflon? Then you could shoot bullets into orbit and they would go through nearly anything. __________________ Uncle $crooge

30th November 2006, 08:30 PM	(permalink)
HiTech Experienced Member	Lots of studies have been done regarding bullet coatings and barrel treatments. Either they are way to expensive for the avg. gun owner, don't last for long under the heat of firing, or diminish barrel life. Molybdenum is the best choice for bullet coatings but once a new barrel has seen it, the shooter should continue using it since on a molecular scale, the particles fuse to the barrel steel. There's alot more science to it than what I present here. There are dry lubricants applied to bullets as well. Barrel fouling is the most prevalent concern and that could affect shot accuracy. Here's a little snip about various bullet types as well as the special procedures for cleaning barrels that fire moly-coated bullets. So the diea of highly reduced friction between barrel and slug is not as desirable as you would think. I remember reading about some theory where if an astronaut were to fire a pistol downward on the moon, he'd sail into orbit.... that is if he doesn't shoot off his foot first, puncturing his pressurized suit!! http://www.bergerbullets.com/tech-info.htm If you were to take a proper sized slug and push it into a rifled barrel, you'd be amazed at what force is needed to manually push it through against the rifling (lands). Between the specific amount of friction necessary to rotate a bullet so it can maintain long range flight accuracy along with hot gases from the charge, barrels become hot very quickly and avg. quality ones will change the POI (point of impact). Good match grade barrels reduce these effects. Military grade barrels can withstand tens of thousands of shots before they wear out. Very high-grade sniper barrels have short lifespans in trade for extreme accuracy where only a few shots would be fired at a time... if that. Remember their motto: "one shot, one kill". __________________ Don't make me reach through this monitor to slap you a good one! Last edited by HiTech; 30th November 2006 at 08:38 PM.

5th December 2006, 01:04 PM	(permalink)
HiTech Experienced Member	WTH is he shooting? We have flame throwers that emit larger flames than that thing. __________________ Don't make me reach through this monitor to slap you a good one!

6th December 2006, 08:16 AM	(permalink)
chiba Experienced Member	It's a Blunderbuss __________________ 2.4Gigglehurtz

7th December 2006, 06:22 PM	(permalink)
Hero999 Experienced Member	Most little mains transformers will work. I recommend a 6V to 240V mains transformer. __________________ What's so bad about Microsoft? Get Opera it's simply a superb browser.

16th December 2006, 06:12 PM	(permalink)
leglesslizard New Member	Hey guys have built the circuit and i only get a shock on the output when i release the switch, i.e. i assume when the capacitors discharge but am not sure. Any ideas why this is doing this or is this right? I thought the shock should pulse, if it doesnt any easy ideas on how to make it pulse? cheers

16th December 2006, 06:43 PM	(permalink)
audioguru Experienced Member	Isn't a legless lizard a snake? Welcome to our forum. The 555 is supposed to oscillate. Yours doesn't. __________________ Uncle $crooge

16th December 2006, 11:16 PM	(permalink)
leglesslizard New Member	yeah nearly, you wouldnt know the difference by looking, but be warned it is there. ok cheers any ways to resolve this? the 555 has been changed and im not sure why the circuit is not working really. how could i make it oscillate?

16th December 2006, 11:24 PM	(permalink)
audioguru Experienced Member	If your diodes are backwards then the circuit will have your problem. __________________ Uncle $crooge

17th December 2006, 06:32 AM	(permalink)
leglesslizard New Member	they are round the right way, any more ideas? im not great with electronics and so am pretty stumped.

17th December 2006, 01:14 PM	(permalink)
audioguru Experienced Member	Maybe your battery isn't strong enough. Its TIP31 power transistor conducts a lot of current from a brand new 9V alkaline battery that might last a few minutes. Get a new battery. __________________ Uncle $crooge

17th December 2006, 03:07 PM	(permalink)
Hero999 Experienced Member	Perhaps yout 555 isn't working, try another one. Have you measure the battery voltage using a multimeter? __________________ What's so bad about Microsoft? Get Opera it's simply a superb browser.

17th December 2006, 03:41 PM	(permalink)
leglesslizard New Member	ive now got two batteries in series, dunno if thats wise the shocks bigger but is still only when you release the switch. So its still not oscillating. And yeah ive changed the 555 twice now still no luck. I am rebuilding it with slightly different bits, will let ya know if that one works. Still any ideas for why this one isnt working are appreciated

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