About This Site

Electromagnetic Links

Here are some Web resources I found useful while researching these projects. Please tell me if any links are broken! Also let me know if you know of anything additional that might be useful.

More Links

Levitation

Coilguns

Discussion Areas

  • .HV Community has very active discussions of high voltage and linear accelerator topics. This is where I hang out.
  • eGroups Femm Board is where users can share ideas about FEMM, the finite element magnetics modelling package.
  • eFusion Consortium is a top-notch marketing and communications company that I've been involved in.

Parts

  • MWS Wire provides all kinds of magnet wire, and has even written me to say they are eager to sell small lots to hobbyists like us!
  • WireTron manufactures wires for electromagnets and other applications. They offer a handy piece of free software to help understand and choose magnet wire. Get it!
  • National Semiconductor describes the 555 timer chip here: http://www.national.com/pf/LM/LM555.html
  • The general-purpose 2N2222 (or the plastic-case MPS2222, as Motorola produces it) is spec'd on the Fairchild site at: http://www.fairchildsemi.com/ds/PN/PN2222A.pdf
  • Capacitor Testing and Safe Discharging by Samuel M. Goldwasser has a great deal of practical information about capacitors.
  • Hart Scientific and INSCO is the calibration laboratory for all types of measurement devices. They provide ISO accredited calibration services for research equipment, laboratory equipment and measurement weights.
  • Tribology: Rtec Instruments specializes in design and manufacturing of high tech instruments such as tribometers, 3d profilometer, stress tester and atomic force microscope etc.

Finite-Element Analysis Programs

  • FEMM, a free package supported by Dr. David Meeker, is an excellent choice for coilgun modelling.
  • The FEMM Tutorial by David Meeker (based on Ian Stokes-Rees tutorial) is an essential introduction to using FEMM.
  • QuickField by Tera Analysis does magnetic field plots for user-defined configurations. Highly graphical and relatively easy to set up 3d configurations. The student edition is a free 3MB download but the limit of 200 nodes will prevent you from solving real problems.
  • Solenoid Physlet is a Java applet for a novel visualization of the magnetic field around a solenoid. This is part of the Web Physics pages by Davidson College.
  • Field Precision creates 2D and 3D finite-element programs for electrostatics, magnet design, thermal transport, charged-particle devices, electromagnetic analysis and radiation transport in materials. The programs are moderately priced for consultants, universities and small companies. Their web site also features several educational items available for download at no charge, including an educational version of 2D software for electrostatics and magnetostatics, a complete package for 3D time-domain electromagnetic simulations, and textbooks on charged-particle acceleration and physics.

Inductance Formulas

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