Language: 
To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

GDPR and DSGVO law

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.
Amazon Warehouse Deals ! Now even more Deep Discounts ! Check out these great prices on slightly used or just opened once only items.I always buy my gadgets via these great Warehouse deals ! Highly recommended ! Many thanks for supporting OverUnity.com this way.

User Menu

Tesla Paper

Free Energy Book

Get paid

Donations

Please Donate for the Forum.
Many thanks.
Regards, Stefan.(Admin)

A-Ads

Powerbox

Smartbox

3D Solar

3D Solar Panels

DC2DC converter

Micro JouleThief

FireMatch

FireMatch

CCKnife

CCKnife

CCTool

CCTool

Magpi Magazine

Magpi Magazine Free Rasberry Pi Magazine

Battery Recondition

Battery Recondition

Arduino

Ultracaps

YT Subscribe

Gravity Machines

Tesla-Ebook

Magnet Secrets

Lindemann Video

Navigation

Products

Products

WaterMotor kit

Statistics

  • *Total Members: 84075
  • *Latest: icew4ll

  • *Total Posts: 894629
  • *Total Topics: 15736
  • *Online Today: 44
  • *Most Online: 103
(December 19, 2006, 11:27:19 PM)
  • *Users: 2
  • *Guests: 9
  • *Total: 11

Author Topic: Need help, driver for unique coils  (Read 2442 times)

Offline peth

  • Newbie
  • *
  • Posts: 2
Need help, driver for unique coils
« on: October 03, 2009, 11:20:15 PM »
Hi  I am experimenting with various design coils using different cross section conductors (not normal round wire) I need a driver. I have a signal generator that delivers up to 2 volts and a scope but I need to construct a device that I can drive using my sig gen that will deliver amps into the coils my coil resistance is as low as .3 ohms. I need some ideas of circuits etc.

Ian

Free Energy | searching for free energy and discussing free energy

Need help, driver for unique coils
« on: October 03, 2009, 11:20:15 PM »

Offline crowclaw

  • Sr. Member
  • ****
  • Posts: 324
Re: Need help, driver for unique coils
« Reply #1 on: October 04, 2009, 12:57:39 AM »
Hi  I am experimenting with various design coils using different cross section conductors (not normal round wire) I need a driver. I have a signal generator that delivers up to 2 volts and a scope but I need to construct a device that I can drive using my sig gen that will deliver amps into the coils my coil resistance is as low as .3 ohms. I need some ideas of circuits etc.

Ian
Hi Ian, I'm experimenting with similar circuits, all you need is a power mosfet attached to a heat sink. I don't know what power source you have? or what voltages you are using! A variable power supply is ideal. First you need to identify the connections of your mosfet. I use IRF740 only because I salvaged them from a scrap inverter. The device is known as a TO220 package with a mounting hole through it's heat transfer tab. This package  is quite common. You have three connections... GATE, DRAIN and SOURCE.  connect the SOURCE to ground / common negative of your supply. Connect the DRAIN to one end of your coil to be driven, the other end of your coil will connect to supply positive through a choke coil* Next you need a preset pott arround 1K ohm and a resistor of say 200 ohm. Connect the resistor to one end of the pott and the other end to the GATE of the mosfet. The wiper connection can connect to the output of you signal generator. This arrangement will give you the oppatunity to experiment with various gate bias settings. Connect your scope to the DRAIN and monitor your wave forms. If you use multiple windings connect your scope indirectly to the DRAIN as the pulse voltage developed will overload the Y amps in your scope if not attenuated. I suggested Mosfet's as they are easy to work with for this application. The IRF740 has an internal supression diode to compensate for back EMF's when switching inductive loads, there are many other similar devices you can use. Down load a PDF of your chosen device. Another good tip... loads of scrapped PC's arround, retrieve the power supplies for useful bits! Lastly a choke is just a single coil wound on a ferrite former a value of arround 100uH should be ok this goes between your coil and positive of your supply. Have fun Regards Merv.

Offline peth

  • Newbie
  • *
  • Posts: 2
Re: Need help, driver for unique coils
« Reply #2 on: October 04, 2009, 01:15:36 AM »
Thanks, have other things to attend to just now but will go over and soak up what you have outlined  ;D
Ian

Free Energy | searching for free energy and discussing free energy

Re: Need help, driver for unique coils
« Reply #2 on: October 04, 2009, 01:15:36 AM »
Sponsored links:




 

OneLink