100uF 5Kv Can Crusher

[DonaticX]

is this stored in an old oven? ^^

[thinkgeek314]

just skip to 2:20

[TheAluminiumklorid]

How many "Gauss" is the magnetic field?

[riotofdablood]

i pay taxes. why they didn't teach me this at school??

[bobdavis321]

@riotofdablood - They do not teach you anything in school! I could start a list of what they do not tell you. They spend lots of time telling you 'you cant' in hopes that you will believe them and never try.

[tjpld]

Do it with a full can.

[tuxicle]

Nice! I noticed you didn't seem to turn the HV off before retrieving the can... so maybe it was a good thing your transformer burned out :)

[s73v36]

Yeah baby, my can is sooooo flat. Hey wife look at my can.

YOU SPENT 500 ON CRUSHING A CAN?!? NO SEX FOR YOU

[XTwina]

I dont think, tha cap is pulse capable for long :(

[thewii552]

awww, you burned out the transformer...

[vanadiumV]

EMP will burn you lcd monitor !!!

[prankmypants]

The aluminium is non-magnetic, so the only effects are electromagnetic. The changing magnetic field will induce voltage and therefore current in the aluminium forming an electromagnet which will repel the coil. But as the eddy current enduced forces are overwhelmingly strong this simply crushes the can.

[DownwardFamily]

that was the best cancrusher I ever saw!!!

[pixelpatter01]

Not my show here, but to respond on how it works: The sudden rush of high current through the outside coil induces a very heavy current in the metal can, which pushes it away from the coil. The action is dramatic with very quick high currents. The aluminum does not repel the magnetism to any real extent, it's the current induced in the aluminum by the sudden field.

[eCicerone]

Cool, have you ever tried an unopened can, would love to see a video on it as I haven't seen anyone yet.

[glenwoofit]

LoL, Great Video!

[jsl151850b]

Short Attention Span Theatre: 02:21

[j822bosh]

I surmise from your other videos that this works based on aluminum's repulsion of magnetic fields? I calculated 1,250 joules! Rock on dude! Just a thought, but you might be able to use this contraption to press form aluminum sheet against steel dies to form shapes etc etc.

[triggerhappy77707]

They actually use that, though a am not sure where. Called magneforming.

[johnclavis]

Thanks for the video -- great payoff! It's always great to see home science demos on YouTube. Stay grounded!

[v1ryus]

Amazing - really have to commend you.

[Alex618mir]

wow we are one step closer to TECHNOWORLD!

[sp1ic3]

you should record the crushing of the can in real time slow motion... then the crushing power can be really clear...

[r0cketman22]

Cool!!

[TheGadler]

Überflüssige Dinge, die die Welt nicht braucht!

[jindivik321]

put your knob in it :D

[yutzwagon2]

Are you a science teacher or something? 'Cause you should be.

[zepass]

new generation of coke drink!

[Koroush51]

Awesome! What would happen if you stick your hand in that?

[redjollyroger]

Hi Bob,just came across your vid. Interesting.

Bob if I find a working microwave oven which would the volt amplifier be?

I rather learn from your experience than 2 keep buying parts.

email me if you have some time. Thankz

/

[bobdavis321]

The power transformer, its made with an iron core with copper wire around it. It provides 2000 volts AC.

[duguder]

Can someone explain the mechanics? I thought you need at least a thumb and a finger to crush a can.

[bobdavis321]

It is being crushed by an electromagnet

[asdfjklasfdjklasdf]

maybe i'm just dumb but how is a magnet crushing an aluminum can? are there trace amounts of ferrous metal in them or something?

[bobdavis321]

Something they do not teach you in school - aluminum actually repells a magnetic field. The can is also a short to the coil so it gets heated too.

[MINTYfreshCOJO]

Oh, that makes sense now. I was wondering that as well.

[tank1712010]

@bobdavis321 It repels a changing magnetic field. If the field were static, aluminum would not repel it. You'd need a superconductor for such a feat.

[DjViOd]

@asdfjklasfdjklasdf search on wikipedia for Lenz Law, that will explain alot i guess.

[FuegoTortuga]

@bobdavis321 Question, could you also find a way to make a vertical ring in order to flatten the can either with or without the original horizontal coil still in place?

[themanyone]

I posted a video response to try and explain what's going on in simple terms. It took me years to understand how magnetism, excuse me, I mean electromagnetism works.

[Kizmox]

See my profile for real badass 14000volt can crusher... it will explode cans in two pieces

[bobdavis321]

I am going to try again to slice the can in half. I need just a little more power. Then I plan on destroying a pumpkin....

[bobdavis321]

The fireing in the video fried the power transformer and the diodes. I replaced them and turned it on and fried the capacitor! So it will be a while untill I have more video's.

[bluejmc]

I love Kim Hill I can hear her new sound in the back groung

[sirHOAX]

Went out and got some high power scr's based on your other videos. They are only 400V-70A[1000A-2000A_Pulse-Rat­ed]

Just curious if there is anyway to figure out where the threshold of these devices are in relation to microFarad charging/discharging? Any chance you know the calculations off hand. Don't want to blow these things apart.

Nice experiments. Always fun to see things get crushed from high voltage discharge.

[bobdavis321]

It sounds like they would work fine other than the maximum of 400 volts. You might be able to exceed that slightly.

[ChazTheOne]

I'd like to see the CRT screen in the back now. I'll bet it needs some de-gausing.

[bobdavis321]

Its an LCD screen otherwise it would be just about ruined.

[000Igor000]

that was amazing

[DrPersonman]

Wow I did not expect the can to end up like that.

[jameslmorehead]

nice 1200 joule single capacitor solution.

[Mosfet510]

Woa!! I don't think I have seen a can crusher do that before, deformed and twisted yes, but like ntjbjhq said, it was almost cut in half......

Imagine adapting that to a rail gun?

[NixuzE]

Awesome! One of the best crushes yet.

[ntjbjhq]

WOW! Almost cut it in HALF!!! Awesome! Can't wait to see more from this beast!

[user12119]

Imagine putting your arm in there!

[Scorge120]

Nothing would happen :P

[user12119]

lol Im only joking :P

[Squallboogie02]

i think it only works with metallic objects, so your arm should be ok.