3v OU Flashlight

[TinselKoala]

OK,  just to clarify from the attached PDF file posted earlier:

take care, peace
lost_bro

OK, using that formula I also get 48.4 kHz, which makes a lot more sense and agrees with the result Gyula posted. Units are important!

Thanks much.

However.... I am pretty sure that formula is for a one-piece toroid. The fact that we are all using multipiece cores will probably screw that up.

[Vortex1]

The schematic was derived by a couple of fellows at Overunityresearch, I may not be at liberty to post their detailed work. I will check in with them, or since they read here,  they can chime in.

I'll see if I can post you a link: http://www.overunityresearch.com/index.php?topic=2420.msg38115#msg38115

The heatsinks are just insurance should I get into a saturation condition when I hook up the inductor, never hurts to have a little extra heatsinking, besides if this doesn't work as advertised, I would like to use the driver for other experiments. I will also be driving some larger ferrites, perhaps from a power supply so I can watch the power consumption as I tune.

I used 220 ohm load resistors so that I could observe the switching without a lot of ringing etc, it is just a first step to see if everything is working correctly, then I will build the rest, including putting in some of the transient protection diodes and a properly wound and gapped ferrite core, MnZn type.

I know about LED's non-linearity, they are not necessarily the only devices I will use as a load test.

I am well aware of the limitations of a 9 Volt battery, and I do not expect any serious overunity.

The Miller clamps are specified as 2n3703, but faster devices could be used if needed.

I'm using IRF530's because I have them on hand, 14A 100V, nanosecond switching ability 0.16 ohm rds(on)

Should I perhaps not be posting here? I haven't done so in a few years but was very active in the past.

[lost_bro]

However.... I am pretty sure that formula is for a one-piece toroid. The fact that we are all using multipiece cores will probably screw that up.

Good evening TK

Yes, you are correct... It is for a Toroid.

I guess I just wanted to expose the fact that the anecdotal information of * Core self-destruction* is not based on Fantasy or Imagination but does has a * rational * explanation.

We have to start somewhere with this.....

take care, peace
lost_bro

[Cap-Z-ro]

The schematic was derived by a couple of fellows at Overunityresearch, I may not be at liberty to post their detailed work. I will check in with them, or since they read here,  they can chime in.

I'll see if I can post you a link: http://www.overunityresearch.com/index.php?topic=2420.msg38115#msg38115

The heatsinks are just insurance should I get into a saturation condition when I hook up the inductor, never hurts to have a little extra heatsinking, besides if this doesn't work as advertised, I would like to use the driver for other experiments. I will also be driving some larger ferrites, perhaps from a power supply so I can watch the power consumption as I tune.

I used 220 load resistors so that I could observe the switching without a lot of ringing etc, it is just a first step to see if everything is working correctly, then I will build the rest, including putting in some of the transient protection diodes and a properly wound and gapped ferrite core, MnZn type.

I know about LED's non-linearity, they are not necessarily the only devices I will use as a load test.

I am well aware of the limitations of a 9 Volt battery, and I do not expect any serious overunity.

The Miller clamps are specified as 2n3703, but faster devices could be used if needed.

I'm using IRF530's because I have them on hand, 14A 100V, nanosecond switching ability 0.16 ohm rds(on)

Should I perhaps not be posting here? I haven't done so in a few years but was very active in the past.

Glad You're back V...its been a while.

I look forward to reading more of your posts.

Regards...

[Vortex1]

Glad You're back V...its been a while.

I look forward to reading more of your posts.

Regards...

Thanks Cap, yes time flies......