Search found 42 matches

by bullrees
Fri Mar 19, 2010 10:14 pm
Forum: Off-Topic Hobbies
Topic: Science Fair Help (ISEF)
Replies: 24
Views: 2476

My first thought is the frames per second you can record..then the LED freq can be varied either way. I expect a match would be ideal but obviously the led can be much faster. I would make the LED flash as fast as possible and still be caught by the cam. I think that will give the best measurement. ...
by bullrees
Tue Jan 26, 2010 7:56 pm
Forum: Pneumatic Cannons
Topic: Noobs first gun (damage Vid)
Replies: 14
Views: 2151

What is the standard angle to really fire at? 42 seems to be what the external calculator likes. Is that what you would fire at to compare?

Either way a straight line of safe fire is a bit difficult in my neighborhood.
Image
by bullrees
Mon Jan 25, 2010 8:55 pm
Forum: Off-Topic Hobbies
Topic: Continuity Light?
Replies: 15
Views: 1805

you could also use a double pole switch on the individual circuits that turns off the main light when pressed if current is the main concern.
by bullrees
Mon Jan 25, 2010 8:37 pm
Forum: Off-Topic Hobbies
Topic: Continuity Light?
Replies: 15
Views: 1805

By "light" do you mean LED? What power source are you using? If you are using a LED the voltage used if you wired it from source to ground after the main switch should only be about 1.2-1.5 volts depending on the diode. That's what I would do. Lowest possible drain..and if it breaks(shorts or opens)...
by bullrees
Mon Jan 25, 2010 7:00 pm
Forum: Pneumatic Cannons
Topic: Noobs first gun (damage Vid)
Replies: 14
Views: 2151

Thanks for the numbers Mr.C

I get the same as you (230) as is but get 183 for a 15" chamber.
Wish I had a chronometer about now :(
by bullrees
Mon Jan 25, 2010 5:40 pm
Forum: Pneumatic Cannons
Topic: Noobs first gun (damage Vid)
Replies: 14
Views: 2151

btw where do you live? USA @tghhs I'm not sure if I'm selecting the correct valve type and my numbers are correct. If you guys can look it over and let me know it would help a ton but here's what I get whit what I think I should use. http://i47.tinypic.com/14bhst0.jpg EDIT: If I cut the chamber in ...
by bullrees
Sun Jan 24, 2010 9:44 pm
Forum: Off-Topic Hobbies
Topic: Shooting a CRT TV Safety?
Replies: 7
Views: 516

by bullrees
Sun Jan 24, 2010 9:37 pm
Forum: Pneumatic Cannons
Topic: Noobs first gun (damage Vid)
Replies: 14
Views: 2151

yup and no honk...just like you said. The chamber don't take long to fill with a compressor so if anything I'll make the barrel longer. There is always some air left over now but not a ton. I have more parts to make the same gun so I'll do changes in version 2.
by bullrees
Sun Jan 24, 2010 8:28 pm
Forum: Pneumatic Cannons
Topic: Noobs first gun (damage Vid)
Replies: 14
Views: 2151

Noobs first gun (damage Vid)

I don't have pics of the gun because it's not painted up yet. It's a basic over under sprinkler. Will get some pics soon. SPECS BARREL: 1"x64" CHAMBER: 1.5"x60" VALVE: 1" RAINBIRD SPRIKLER WITH MOD BLOWGUN(credit to Mr.C) Note: As we were about to shoot a neighbor came over to borrow a tool. He want...
by bullrees
Sun Jan 24, 2010 11:50 am
Forum: Off-Topic Hobbies
Topic: Shooting a CRT TV Safety?
Replies: 7
Views: 516

Thanks for the tips, vids and links guys. I wanted to be sure we wouldn't be making a trip to the ER today. I'll put up a damage vid/pic later today.
by bullrees
Sun Jan 24, 2010 3:12 am
Forum: Off-Topic Hobbies
Topic: Shooting a CRT TV Safety?
Replies: 7
Views: 516

Shooting a CRT TV Safety?

Just wondered if anyone has done this before. I know a CRT has a vacuum so it will implode then spray glass. I will be hitting a 19 inch crt tv with a "c" cell battery. I plan to cover the ground with a tarp to help pick up any glass but any ideas are welcome. What's a good distance so I'm not hit b...
by bullrees
Sun Jan 24, 2010 3:00 am
Forum: Combustion Cannons
Topic: 1st Propane/MAPP gas cannon
Replies: 18
Views: 6532

My first gun had duct tape all over also.I don't think I'd have the balls to stand down range with my boys aim but good for you. cool vid.
by bullrees
Sun Jan 24, 2010 2:16 am
Forum: Off-Topic Hobbies
Topic: Not a spud gun but a spud catapult
Replies: 10
Views: 557

I have many ways to wreck your day...don't make me use em...lol Seriously though I grew up without a dad so i always promised myself if I ever had a kid I'd do stuff like this with him/her. Some other projects we have planed. Growing Bioluminescent Algae http://www.instructables.com/id/Grow-Your-Own...
by bullrees
Sun Jan 24, 2010 1:22 am
Forum: Off-Topic Hobbies
Topic: Not a spud gun but a spud catapult
Replies: 10
Views: 557

I think my favorite part is that the neighbor girl is telling him what to do the whole time and he ignores her. Like a manly man would do...so I've heard :p

@ TwitchTheAussie love the avatar RIP Dime..one of a kind.
by bullrees
Sat Jan 23, 2010 3:27 pm
Forum: Off-Topic Hobbies
Topic: Not a spud gun but a spud catapult
Replies: 10
Views: 557

That's nice of you to say, thanks. It don't really do damage so sorry no pics :(