1. B

    Creating own Electromagnets & Calculating the Forces between them

    So basically I’m trying to create my own electromagnets and conduct my own experiments. I’ll have an arduino microcontroller send a current into the wire that is coiled around the magnet, thus increasing the strength of the magnetic field, which in turn will touch with other magnets. I want to...
  2. M

    Materials for electromagnets

    So I have 2 3 inch, .5 inch diameter rods of 1018 steel that I’m trying to turn into electromagnets. I know it’s permeability isn’t that great but I couldn’t find any soft iron. What gauge wire is best for making rather powerful electromagnets? What type of batteries should I use? Is there...
  3. Luiz Fernando Vieira

    PLASMONICS - Exercise

    Hi I'm having difficulties with the plasmonica exercise, I sell some books and scientific publications I came across that there are two or more ways to get the result but I don't know what the correct sequence is. Values: τ, γ and mainly ωp^(2). ωp^(2)= in most of the literature = Design and...
  4. Kadav

    Need help with Magnetism Home work

    Hello can you please help me with these questions in magnetism about ferromagnetism .. Thanks Very much
  5. 8

    Purpose of a rectifier in a positive oscillating circuit

    Hello, I found a circuit (transmitter) design that would create an oscillating magnetic field. Another circuit (receiver) would pick the induced voltage up and amplify it. Now as I understand it, the oscillating part has only positive voltage. But in the receiver part they use a recitfier. Why...
  6. K

    Mosfet not switching off with solenoid valve.

    I want to switch on a 12V 1A(peak 1.4A) solenoid valve for 0.1-3 seconds(set using a trimpot) and then switch it off. I'm using 555(operating at 5V, triggered by a IR sensor which operates on 5V only) in monostable mode to generate a 0.1-3s pulse, which is fed directly to gate of mosfet(IRF540-...
  7. B

    Novice requiring guidance on creating a XL magnetic pendulum

    hello im hoping for some guidance in creating the electronics for a XL pendulum, i bought my mum the toy one on the left and she loved it that much she tried to make a bigger one but it ws made from metal and was to heavy to work, id love to get this complete for her. untimatly id like this...