Turning on and off a Pernament Magnet Field

[romerouk]

Anyone can replicate this setup and I hope I will get some confirmations soon. Do the simple testing, first from the instructions in the picture below and I am waiting for someone to replicate it soon.

[aaron5120]

Dear Romerouk,
I am willing to replicate your idea. Can U please provide a little bit more data of the setup? How many turns and gauge of the magnet wires used in the Mumetal core, and number of turns and gauge in the pickup coil?
Also if you can give hints about the frequency used for the pulsing, is it all right a 30% duty cycle of 50KHz square wave pulse? 5V peak to peak?
Aaron5120

[e2matrix]

Good to see you around romerouk.  As far as frequency goes it would probably be best to take any advice romerouk has but if he doesn't get back around here soon you might try something around 180 Khz as I had some info saved from someone else that this frequency worked in turning off a magnet.  Although at 180 Khz it was likely a different setup using solid state switching.  It appears the setup above uses a relay which I'm sure can't turn on and off at that frequency. 

[romerouk]

Dear Romerouk,
I am willing to replicate your idea. Can U please provide a little bit more data of the setup? How many turns and gauge of the magnet wires used in the Mumetal core, and number of turns and gauge in the pickup coil?
Also if you can give hints about the frequency used for the pulsing, is it all right a 30% duty cycle of 50KHz square wave pulse? 5V peak to peak?
Aaron5120

Hi,
I have used different gauge and different size of wire. All depends of the magnet used also the size of your mumetal core.Better is to try yourself with different turns and size, depending of what u have. Build only one coil only and after attaching the magnet to the core make sure that the magnetic field is not penetrating the core.Hang a small piece of metal at some distance from the coil(eg. 1cm) then power the coil.Use small voltage, starting with 1 volt and see what you need to transform the core into an electromagnet but just enough to allow the magnet field to pass thru.Too much voltage will cancel the effect.
I am attaching below a picture that can explain more.
Success all!

[luishan]

Thank you for your efforts to share with us about the device.
Would show us working prototype on Youtube with explain.
Thanks.