Step 9: Charge Shuttle Asembly

   Drill a 1/4" hole in each 1" dia sphere. Insert spheres onto each end of the pen cartridge; secure w/glue. Locate and mark the balance point of the assembly. Carefully stick a push pin through this point to make the shutle axle entry hole.

   Straighten a paperclip to make the charge shuttle axle. Insert one end of the clip perpedicularly through the hole. I made bases for the shuttle mounts from 1/2" x 1/2 dia wood plugs cut from a dowel and inserted into one end of each straw.

   Important Note: the shuttle assembly must be equidistant from upper and lower electrodes so that each sphere of the shuttle contacts a stationary sphere simultaneously (it's embarrassing to say how long it took to [almost] achieve this requirement!  :> o). Once you determine the optimum shuttle height and repositioned the stationary electrodes as needed, hold the mounts in position and mark the location; drill a 1/16" hole in each straw to accommodate the axle. Glue mounts to the base. Lastly, insert the shuttle-axle assembly between the mounts and lock the in place by bending axle ends at 90 degree angles.

<p>Hi wanted to make this for science project but have no idea of air ionisers, checked on net and they look without an output lead, so how do we make that a power source and connect to the click clack.</p>
<p>Once you have a suitable ionizer, attach an insulated wire to the HV output terminal (the point where ions are generated). A return wire connected to the ground of the ionizer is optional; or you could attach the return to an earth point such as a metal cold water pipe.</p><p>B'08</p>
<p>Thanks a ton :)</p><p>Padma</p>
<p>Good places to find negative ion generators are yard sales or Good Will outlets. Small units that operate on 12 volts DC are safer. When the click-clack is balanced properly, you won't need a high wattage power supply; even a tabletop Van de Graaff will work.</p><p>Good luck w/your science project. </p>
This is going to be a great help for my next science fair. This is cool!
Good luck w/your project!
Why can't we use AC current there? Can you explain me?
&nbsp;&nbsp; If you switch the input polarities manually to simulate <em>very low </em>frequency AC, the project still works. Higher frequency AC would change too quickly for a simple mechanical shuttle to operate properly.
How much voltage and current is needed for the whole project? Does normal supply of 220V works?
The input for the air ionizer is 12V at 125 mA, supplied by an AC adapter. Ionizer output is around 7,000 VDC in the microAmp range. An ionizer that runs directly from 220V mains would work, but there is a shock risk.
An intro to your Instructable is now on my Blog:<br>http://faz-voce-mesmo.blogspot.com/2011/05/um-instructable-dum-lusofono.html
Thanks for featuring my project!
Anytime, keep those projects coming...
Could you use the plastic mirror style christmas tree ball instead of tin foil?
Be sure these ornaments are conductive; some are just silver or gold colored plastic.
couldnt you just use tennis balls instead of paper wads?<br>
Try ping-pong balls; tennis balls would be too heavy.
You could possibly use a CRT TV as a HVDC source.. Just put a sheet of aluminium foil on the screen (it'll stick) and that will be your +, a wire to a water pipe or something and you're done
Don't recommend that, I did that and touched it with an aluminum rod in hand. Really bad idea, but didn't hurt, it did when I touched the tinfoil though. The tv shut off and restarted once and then I noticed that the screen would go goofy behind the tinfoil when I drew an arc, it would produce a good spark too especially for me as the negative thing, whatever it is called, can't think of it right now.
Very good, well written instructable. Love the science behind it!
Thanks for the + feedback!
Thank you for publishing this. Our high school had a Van de Graaf static generator and a Wimshurst static machine back in the 1960s, but I had never seen one of these. It would have been a good addition to the science demonstrations.
The project has generated alot of interest at jr &amp; high school science fairs. Thanks for viewing this i'ble.

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