Self running coil?

[gotoluc]

Well, it's no go with the 10K resistor on the 555 output and the mosfet gate

Back to the drawing board

Luc

[Magluvin]

Ok so we know something.  I need to get rid of my 10k resistor. lol

I wonder if you can put a pickup coil on the opposite end of that magnet without disturbing the tcore.

Mags

[Magluvin]

Heck  try the 12v in the cap. Run it all on the cap. give it an alligator clip.  the effect may be better at higher volts.

Mags

[gotoluc]

Ok so we know something.  I need to get rid of my 10k resistor. lol

I wonder if you can put a pickup coil on the opposite end of that magnet without disturbing the tcore.

Mags

I've mentioned that anything ferromagnetic brought close to the Toroid coil affects it. Seems to be an indication of a Resonant state.

Luc

[gotoluc]

Heck  try the 12v in the cap. Run it all on the cap. give it an alligator clip.  the effect may be better at higher volts.

Mags

I've also mentioned that 2.80vdc is about the maximum voltage the input can be. Anything higher and it starts to consume current from the input capacitor.

Luc

Gyula has explained this at the Energetic Forum:

The 2.8V limiting is explained by the drain-source capacitance change vs drain-source DC voltage: if the voltage is increased the capacitance decreases, hence the resonant frequency of the LC circuit created would also change. But because the input frequency does not change from the 555, the voltage on the drain side should stay where is was earlier, if it is changed by force from outside for instance then the drain-source capacitance would also change so the parallel LC resonance high impedance would suffer where the max voltage come from.

Gyula