Resonance Circuits and Resonance Systems

[tinman]

Well i can confirm that in a resonant state or frequency,you do get more out for less in.

Below is a scope shot of two LED's being run while the inductor is in a resonant state.
If the frequency drop's by more than 100Hz either side of the 8.5KHz,then the LEDs dull off,and the power consumption go's up.

Each scope trace is across each LED-->there are 2 LED's in the circuit.


Brad

[Belfior]

Hi!

I'm trying out some coils for the first time and I want to get resonant coupling going on https://en.wikipedia.org/wiki/Resonant_inductive_coupling

I am trying to find the simplest circuit to test some "tesla" coil arrangement and they are hard to find. People seem to be working with ignition coils and arcs mostly.

Would something like this work to drive the primary? My secondary could just be a coil with a cap for tuning. Then near field transmission from secondary to load.

https://www.circuitlab.com/circuit/y9wuxmsmf697/tesla-driver-circuit/

I got TL494 for the square wave and 2N3055 for driving the coil. I got IRFP260Ns coming, but that might take awhile and I want to try try this out already

I am just starting my electronics hobby and I want to get a feel for coils and resonances before going into kapanadze replicas

[Magluvin]

Hi!

I'm trying out some coils for the first time and I want to get resonant coupling going on https://en.wikipedia.org/wiki/Resonant_inductive_coupling

I am trying to find the simplest circuit to test some "tesla" coil arrangement and they are hard to find. People seem to be working with ignition coils and arcs mostly.

Would something like this work to drive the primary? My secondary could just be a coil with a cap for tuning. Then near field transmission from secondary to load.

https://www.circuitlab.com/circuit/y9wuxmsmf697/tesla-driver-circuit/

I got TL494 for the square wave and 2N3055 for driving the coil. I got IRFP260Ns coming, but that might take awhile and I want to try try this out already

I am just starting my electronics hobby and I want to get a feel for coils and resonances before going into kapanadze replicas

I checked out the wiki. Those are interesting proposals they show in pics below. Ive only ever seen coil loop to coil loop in transmitting and receiving like TK has shown in his vids. Would there be a difference by having a separate LC next to the receiving coil vs just having the receiving loop as the L of the receiving LC? And then they show a separate LC with the transmit coil also.  Is worth looking at.

The other link is not working for me.

Are you looking to go Tesla for the high voltage aspect?

Mags

[TinselKoala]

Resonant inductive coupling:

http://www.youtube.com/watch?v=MhBgAAJUPsw
http://www.youtube.com/watch?v=gi-hl2W86yk

Resonant capacitive coupling:

http://www.youtube.com/watch?v=JaPvdN75dl4
http://www.youtube.com/watch?v=kndYHIHSAE8&t=337s

[TinselKoala]

Hi!

I'm trying out some coils for the first time and I want to get resonant coupling going on https://en.wikipedia.org/wiki/Resonant_inductive_coupling

I am trying to find the simplest circuit to test some "tesla" coil arrangement and they are hard to find. People seem to be working with ignition coils and arcs mostly.

Would something like this work to drive the primary? My secondary could just be a coil with a cap for tuning. Then near field transmission from secondary to load.

https://www.circuitlab.com/circuit/y9wuxmsmf697/tesla-driver-circuit/

I got TL494 for the square wave and 2N3055 for driving the coil. I got IRFP260Ns coming, but that might take awhile and I want to try try this out already

I am just starting my electronics hobby and I want to get a feel for coils and resonances before going into kapanadze replicas

I would recommend "backing up" one step and going for the auto-resonating circuits like the Slayer Exciter using your 2n3055 to start with.
(You should also know that not all 2n3055s are created equal, there are many fakes out there that cannot take the HV, so try different manufacturers and sources for your transistors if possible.)

The reason for using auto-resonating circuits is that the actual resonant frequency of the coil set will change due to changing environments like proximity of your hands, other metal objects, supply voltage and so on. So if you are using an oscillator circuit like the 494 you will constantly be retuning to keep the setup in resonance and may miss the true resonant point altogether. Autoresonating circuits are much easier and simpler to work with when you are starting out.

There are many different types of autoresonators. The TKoil X circuit demonstrated above is an antenna-driven E-field feedback circuit but is more complicated (and less safe)  than the direct base-driven Slayer Exciter circuits as shown below. More sophisticated auto-resonating SSTCs use phase-locked loops (CD4046, etc.) to lock into resonance and these can produce great results but are not for the raw beginner.

Good Luck!

This will work with 2n3055:
http://www.youtube.com/watch?v=c6uQUxC7DS8