How to get energy from resonance

[Johny70]

I made resonant transformer (BOCAF, transvereter) and get nice saturated core with high voltage from resonance (~400V, input 25V/200mA) in secondary coil. I tried to build circuit for drawing energy from resonated coil (shown on many web sites, with capacitors, transistors, SCR, ...) but they don't work. Resonance stop whenever I try to get even a mA from it.

Question: Does anybody built a circuit for drawing energy from resonated coil?

Thanks in advance,

Johny

PS Sorry if I missed some post with similar answer.

[andrea76]

charge your cellphone with resonance transformer:
https://www.youtube.com/watch?v=mpfHnCW3hUc&list=UUAGxGhwMAk0xI3YTZPQHcnQ

[gauschor]

Cool cellphone charger. A picture of the circuit would be nice. Also how long it takes and how often this works and if the battery is killed by this circuit (similar to Hectors experiments) etc. etc.

[Magluvin]

I made resonant transformer (BOCAF, transvereter) and get nice saturated core with high voltage from resonance (~400V, input 25V/200mA) in secondary coil. I tried to build circuit for drawing energy from resonated coil (shown on many web sites, with capacitors, transistors, SCR, ...) but they don't work. Resonance stop whenever I try to get even a mA from it.

Question: Does anybody built a circuit for drawing energy from resonated coil?

Thanks in advance,

Johny

PS Sorry if I missed some post with similar answer.

Read the first few pages of this pdf.

Mags

[centraflow]

Nice pdf Mags,


you can also look at RF transformers, there are some very exotic transformers made by Hams if you look on the net, they are designed not to interrupt the primary even if step up or down, I have a push pull design I use a lot between oscillator and preamp, also preamp to linear running at a kw, 28Mhz, the right ferite of coarse for the frequency is important.


regards


Mike