PULSERs ONLY

[EMdevices]

That's correct Stefan, no DC-bias current,  only AC.

I posted the circuit to these blocking oscillators in another tread a while back.  It's the same circuit, except the coils are now on a ferrite.

EM

P.S.  Here's the circuit.  Also I forgot to mention, it does saturate when the magnet cancels the earth's magnetic field, but I have to bring in the magnet even closer.  If you read up on the theory of the blocking oscillator it will become clear why its affected by saturation, since it triggers based on those coils and how fast or slow the current changes.

[EMdevices]

Here's a chart to try and explain what I'm thinking.

Note the slope change.  The steeper the higher the inductance.

There is more to it, but in a sense its the bias point that changes.  But it's not excluded other phenomena might be occuring.

[nong]

Hello Grumpy,

Please recommend what is the circuit for mosfet driver,"7Mhz Astable Multivibration" or "Emitter follow driver" figure 27 ?

Now, I'm stuck using TC4428 (the best I found here)  !!!

Thank you
nong

[EMdevices]

 

[gyulasun]

Hi EMdevices,

Nice experiment. You induce current in the (floating) multiturn, shortcircuited ring by the long (pinkish-red) solenoid and the created flux in the ring repels the the flux of the ring magnet.

What is your purpose with this setup?

Gyula