Portable shopping cart locking force field OF DOOM

Step 3 Going in!

It's time to try it out!
put the belt on, and wear a shirt long enough to cover it. plug the belt in to the mp3 player, crank up the volume and put it on repeat. i recomend putting the mp3 player in your pocket. test the range by moving close to a cart until it stops. if they stop, awesome! if they don't, GO OUTSIDE then check for shorts (don't do it in the store!), if there aren't any, your mp3 player isn't loud enough.

Comments

[SirStokes]

What country is this from? I'm in the US and I've only heard preposterous theories about self braking shopping carts.

[TheIronHobo]

i am in us and i have had a shopping cart lock up on me. look for a weird device on one of the wheels it looks innocent but it will brake it fast!

[atilladolphun]

with reguards to the cathod ray tubes i used to work at a tv plant in tn even the brand new tubes hold quite a punch i had gotten shocked by them befor and it can be felt all the way up to the sholder though at that time it was just a stadic charge so no real amps in the tube but still got your attention.

[Shinji]

i just built one of these, and im so excited to try it i can hardly breathe... oh well. Amplifiers are very easy, just break open a tv and find an IC with only one side covered in pins, probably starts with "AN" (the # on the front) and look up the schematics online. I built one of these, and it just took an hour for a 3w amp. not amazing, but same principal i guess... T-elospathic

[joe57005]

cool, DON'T GET CAUGHT! also, i'm not going anywhere near the very high voltage innards of a cathode ray tv. i've seen a screwdriver weld itself to a tv amid pretty spaks and a very loud crack. i'll just destroy a stereo for the parts.

[thermoelectric]

I'm 13 and i have pulled apart a CRT monitor, very cautiously, now im going back for more :)

[joe57005]

cool. don't die.

[thermoelectric]

i'll never die doin this

[Digital_Anarchy]

famous last words...

[CybergothiChe]

 lol

[thermoelectric]

lol

[Frogz]

i took apart my first tv when i was like 12, not all models use the same amp ic infact, alot of them will use a lm class amp(or other) there is no sure way to tell what the amp chip is but any stereo, tv, or other device with speakers(ie, not ONLY a headphones jack) will likely have an amp in it old boomboxes are perfect as the amplifier circuit generally can be tapped into with 2/3 wires and leave the circuit intact

[thermoelectric]

I have a RGB amplifier out of one but i don't know what to use it for.
Here's a link to it if you know what i can use it for

[Shinji]

The amp ICs that are independent are actually very easy to identify. They have a lot of pins and are usually SIP, mounted to a good sized heat sink, depending on the wattage it puts out. I will happily answer specific comments if anyone wants to ask. The ICs can be found in just about any monitor or TV with speakers, but boom boxes and stereos use whole circuits to power the speakers, so you do have to leave it in tact and switch the inputs and outputs. Just remember: when in doubt, Google the # on the front of the chip! And btw, unless you are working on a gigantic TV with an abnormally huge flyback, there is NOT enough current to kill you! Seriously!

[thermoelectric]

Yea, I agree there isn't enough current but it will still feel like you were run over by a truck

[Shinji]

Ha yeah it does, about a year ago I slipped and jabbed the suction cup with a screw driver not so well insulated... Thats a nasty shock, like if you jumped on a trampoline for 3 years then touched the side of it.

[taz9797]

how many replys are there going to be lol =)

[thermoelectric]

Yeah...

[Adam Manick]

yeah

[bioerror]

I Agree, and handling the Cathode Ray Tube in the wrong way and you drop it, it may EXPLOED!! If your going to use parts from a older tv always, always remove the thick red wire that looks like a suction cup (its about half way down the Cathode tube(towards the part you watch CSI: MIAMI on( by removing this wire you let the gases inside the tube to escape))) also for added safety remove the wires at the small end of the tube. And always remember UNPLUG IT FIRST BEFORE OPENING THE CASE!!!

[mannys9130]

removing the tht (suction cup) will not cause any gasses to escape, in fact, the tube is a vacuum and there is no gas in there. If I had listened to your advice, i'd be in the hospital with arterial fibrelation!

[bioerror]

well you would if u either left it plugged in or opened it right away cuz the CRT can still hold energy after sitting unplugged for a few days, 30+ days should be enough time for the power to drain off.

oh and my dad told me there was gases in a CRT, and my dad is known for being incorrect 80% of the time

[Shinji]

The CRT is a vacuum. It may not be a perfect vacuum, because of manufacturing error, but it is not filled with gases. Sorry daddy, but this is part of that 80%!

The one that shocked me was unplugged ~5 minutes before electrically assaulting me. The CRT does not hold energy, and the amount of capacitance that the flyback has is likely lower than 5 pF. That's hardly anything. What holds charge are the capacitors that supply/buffer the flyback circuit.

This is a long thread. This is awesome.

[GameNox]

I took apart a TV and i didn't get shocked. There are 3 facts I found:
1. The CRT is a vacuum, it is also known as a vacuum tube.
2. It is not filled with gasses. Why would they even think of putting neon or another noble gas inside a TV?
3. TVs won't shock you as long as they are old and aren't plugged in and all the capacitors are empty.

Sorry bioerror it's 3 against 1...

[bioerror]

The comment I made is on Info I have heard (in other words Second-Hand-Knowledge!)

[Shinji]

Well, now you know :)

[Shinji]

The red wire is a BAD thing to play with. unless you like 15-30kV coursing through your body, don't touch the suction cup. All I am saying is that TVs are a good place to find these audio amp ICs, because they are small and self contained. TVs aren't scary, just the red wire should not be messed with unless you discharge the capacitors. Simply put, just don't touch the Red Wire .

[CameronC]

Google how to discharge a CRT safely - theres also a few instructables about it. Also don't try to remove the suction cup unless you 1) know what you're doing and 2) Have already discharged the CRT. Having your hand stuck on to a glass tube that is electrocuting you (Unlikely, but meh) doesn't sound too fun.

[Derin]

or the pink

[struckbyanarrow]

you forgot the yellow

[Shinji]

umm... The yellow? I think it wasn't us who forgot it, but all the manufacturers..

[struckbyanarrow]

i was kidding :D

[bioerror]

Pink?!?! i've never seen any pink wire going to the flyback transformer.

[Derin]

the pink is not on CRT televisions,its the hi-voltage anode for a CCFL in a LCD
_{ok too much terms...may i shut up now}

[Shinji]

True, the only place I have noticed pink is in LCDs. Still high voltage, but only when on. and not near the amount of power as in a flyback.

[mannys9130]

all you have to do is stick a grounged piece of metal under the suction cup to discharge the tobe and anything left in the flyback. the red wire carries high voltage while in operation but if you discharge the tube and board, nothing will happen if you touch it. I have taken apart several crt moniters and have not seen any person that has been electrocuted after they discahrged the tht. Use insulated pliers to push a peice of metal that is grounded under the suction cup. you could also use a grounded screw driver. It is totally safe after discharge... you did unplug the cord from the wall... right?

[Shinji]

It's nice to see someone who isn't afraid of Tvs... Like he says, all you have to do is ground a screwdriver via a wire going into the ground hole of an electrical wall socket, etc. and poke it under the suction cup and touch the piece of metal under it. Cathode Ray Tubes really aren't much to be afraid of.

[thermoelectric]

exactly, im 13 and pulled apart many in my short life (without getting the slightest shock :) )

[CameronC]

Try shooting a discharged crt with an air rifle - Just do it from a distance and put something to collect the glass eg thick tarp and 5 sided box made of concrete slabs. IMPLOSION!

[mannys9130]

exactly. tv sets are not scary at all. If you know what your doing and you take the procaution you will not get a lethal dose of electricity. Take caution and stay away from things unless you are properly insulated of you have discharged the electricity and the inside of the tv will not pose any threat.