Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Custom Search

Author Topic: Screw winding idea  (Read 5758 times)

aleks

  • Hero Member
  • *****
  • Posts: 673
    • DC Acoustic Waves Hypothesis
Screw winding idea
« on: March 23, 2008, 11:22:08 AM »
OK, this is funny of course, but is cheap and precise.

You should use double helix construction screws. A longer ones are preferred than the ones shown on the image.

Longer screws can be screwed into a metallic base (the screw shown is a metal corrosionless self-cutting screw capable of penetrating metal). The head of the screw should touch another base (screw can be screwed through it first). Bases thus should work as "+" and "-".

The wire is taken from a standard UTP5 (twisted pair) cable. It is 200MHz insulated copper wire capable of carrying at least 200W load I think.

You may run pulses on both coils or use one coil for constant DC current and the other for pulsing.

The construction (even with dozens of such screws) is dirty cheap.

(you may read my other postings from my profile to get the idea of what I'm talking about)
« Last Edit: March 23, 2008, 11:42:44 AM by aleks »

aleks

  • Hero Member
  • *****
  • Posts: 673
    • DC Acoustic Waves Hypothesis
Re: Screw winding idea
« Reply #1 on: March 26, 2008, 12:47:20 AM »
Here are step-by-step assembly I'm trying. This one depicts wooden bricks used as a frame.

aleks

  • Hero Member
  • *****
  • Posts: 673
    • DC Acoustic Waves Hypothesis
Re: Screw winding idea
« Reply #2 on: March 26, 2008, 12:48:58 AM »
Assembled frame.

aleks

  • Hero Member
  • *****
  • Posts: 673
    • DC Acoustic Waves Hypothesis
Re: Screw winding idea
« Reply #3 on: March 26, 2008, 12:51:42 AM »
This picture shows screws in the frame. Well, since I've used hand screwdriver and drill, the screws are not that much parallel in this assembly - but that's not that important anyway. Note the aluminum foil used as "+" and "-" contacts (well, there is a lot of resistance between the contacts exist).

aleks

  • Hero Member
  • *****
  • Posts: 673
    • DC Acoustic Waves Hypothesis
Re: Screw winding idea
« Reply #4 on: March 26, 2008, 12:53:28 AM »
Double helix winding on each screw - takes a lot of time if you ask me. Last 3 screw windings are not finished. In a finished "scheme" there are 24 coils available.

aleks

  • Hero Member
  • *****
  • Posts: 673
    • DC Acoustic Waves Hypothesis
Re: Screw winding idea
« Reply #5 on: March 26, 2008, 01:03:11 AM »
Previous picture zoomed in.

I'm not an EE myself, but I'm talking to an EE I know and we'll probably try to pulse this scheme in different variants. I plan to use frequency-adjustable sawtooth waves (10MHz is max) and DC voltage in various combinations (@ 12V peak).

Since a single screw has two "halves" (two coils), variants I want to try are:
1) sawtooth in both halves, in the same current direction;
2) sawtooth in both halves, in opposite current direction (I have my hopes on this one as this should create "kicks" twice as powerful).
3) sawtooth in half 1, DC in half 2.

Beside that coils can be run parallel or serial, so this adds additional variants. If possible I'll try inverse sawtooth as well. Spark gap is also possible, but is not as interesting to me.