Okay, not actually a cyclotron… but this ball cyclotron is a good model for what a cyclotron does and the concepts behind it feel kooky and magical. A pair of Ping Pong balls scream around a glass bowl thanks the repulsive forces of static electricity.
It’s no surprise that this comes from Rimstar, a source we’ve grown to equate with enthralling home lab experiments like the Ion Wind powered Star Trek Enterprise. Those following closely will know that most of [Steven Dufresne’s] experiments involve high voltage and this one is no different. The same Wimshurst Machine he used in the Tea Laser demo is brought in again for this one.
A glass bowl is used for its shape and properties as an insulator. A set of electrodes are added in the form of aluminum strips. These are given opposite charges using the Wimshurst machine. Ping Pong balls coated in conductive paint are light enough to be moved by the static fields, and a good crank gets them travelling in a very fast circuit around the bowl.
When you move a crank the thought of being connected to something with a chain pops into your mind. This feels very much the same, but there is no intuitive connection between the movement of the balls and your hand on the crank. Anyone need a prop for their Halloween party?
If you don’t want to buy or build a Wimshurst machine you can use a Van De Graaff generator. Can anyone suggest other HV sources that would work well here?
Continue reading “Hand-Cranked Cyclotron”
[Christopher] has put together a Prank Stun Baton to annoy his friends. It delivers a slight shock to the person on the business end of the device. Oddly, it’s powered solely by static electricity, there is no battery here and the resulting injury is no worse than touching a door knob after scooting your socks around on some shag carpet.
The design is super simple and is effectively just a rudimentary capacitor. The main housing is a PVC pipe that acts as a dielectric in the ‘cap’ system. Two separate pieces of tin foil are wrapped around the inside and outside of the PVC pipe. These layers of tin foil provide a conductive path up to the a couple of screws stuck in the end of the baton. A ping-pong ball and some foam act as an insulator between the PVC and the screws.
To charge the baton it only has to be brought close to a source of static electricity, a tube TV will do the trick. Rubbing it with a piece of wool will also work. When this is done an electrostatic field is stored in the PVC between the two pieces of tin foil, one side takes on a positive charge and the other a negative charge creating an electric potential between the two screws at the end of the baton. When something (with a low-enough resistance) shorts the screws, the stored energy on the positive screw tries to go to the negative screw, shocking the unsuspecting victim.
Need something a little more powerful? You may want to check out this other stun baton.
This Van de Graaf generator was built using mostly parts on hand. The only thing that was purchased for the project was the Christmas ornament shaped M&M candy tin that serves as the collecting sphere. We didn’t include the in-action shot in the banner because it’s so dark. But sure enough, this will generate the visible sparks that make the device famous.
The gist of the device is that it uses rotating belt to generate static electricity. This potential is stored in the metal collecting sphere on top until a path for discharge is provided. They’re an awful lot of fun in middle-school science class as long hair can be made to stand on end if you touch one while your body is insulated from ground. This build uses a long rubber band as the belt. The band is moved by the motor from a DVD drive tray which is housed in the PVC base. An empty prescription pill bottle bridges the gap between the base and the metal sphere.
If this one is too small for you consider moving to a 900,000 Volt version.
[via Hacked Gadgets]
Want to shoot lighting bolts from your hands to punish your enemies? You can (almost) do just that with this static electricity generator hack. Above you can see the charge jumping off of this guy’s knuckle and surging through the LED. But that’s not the only trick you can pull off when wearing just a bit of hardware around your ankle. The video after the break shows sand grains jumping around as a charged hand is waved over them.
The trick is done by powering a negative ion generator from a 9V battery. This can’t be done directly, since the ion generator is looking for an AC power source. But conversion is as easy as scrapping an inverter which is designed to plug into a car cigarette lighter. Everything is shoehorned into a glasses case, which can then be strapped on to your ankle. Why this fascination with the ankle area? One part of the answer is that this provides an easy way to interface the ion generator output with your skin. The other part of the answer is that you need to make sure the system is grounded (but you’re not) and the build includes a ring that goes around your shoe to achieve this.
Check out the demo and full build instructions in the video after the break.
Continue reading “Ankle bracelet lets you become Emperor Palpatine”