DIY Tesla Switch Guide

[pese]

@Loner
Ref:
The 8:1000 could easily
allow the impulse to go over the MAX Gate-Source voltage of the part,
so Zeners, or careful current regulation of Timer Output will be needed.

Think only that:

If you need to drive the Transiors  buse currents from 1Amp or more  than also an darlington configuration  reduce this 10 or 20 times.
Even if you need 50mA. The 8:1000 ration  (10:1000 with losses)

will you ASK  100 Times more AMPS to drive that.

This are 5 AMPS !
5 Amp with 12Volts  are 50 Watt peaks that must transferred
over the audio-transformer core.

The whole circuit is WRONG . In even ANY detail.
(belive it - i must not discussing so mutch to learn others in electronics.  I will only sen you - an little help- to use your own thinking)
G Pesé

[crowclaw]

Hi crowclaw,

Though I have been aware of the collection on Ron Cole's circuits, now that you mentioned it I recall an US patent (already referred to in this forum) which includes only 1 battery and two (super)capacitors and two or three DPDT switches and it claims the circuit more than doubles the run time for a load driven from the battery and the switched capacitors vs the battery alone.  See here:

http://www.google.com/patents/about?id=85R6AAAAEBAJ&dq=7085123 

and they have a patent application on a variant circuit too :

http://www.google.com/patents/about?id=wiWqAAAAEBAJ&dq=7085123

Unfortunately their circuit needs unipolar supercapacitors, not readily available?

rgds,  Gyula

Hi Gyula,
I'm most grateful for the information you have provided many thanks. I have linked up the circuit just using a single 12 cell and capacitors as mentioned.
I can confirm that this circuit arrangement does work. I haven't done any serious trial measurements etc as I intend to experiment further. I can say however that "tuning" seems to be critical. My initial tests are being carried out with a 10 amp relay which will be limited of course to switching frequencies. I will possibly look at electronic switching either using FET's or SCR's. May be there is something unusual that defies logical thinking with pulse circuits... inductive or otherwise!!  Once again thanks for your interest and reply.

[gyulasun]

Hi crowclaw,

Very good, and  am curious what capacitors you use now: your 18000uFs?

I also wonder if supercaps are a must in their circuit (probably this depends on the heavyness of the load) and I agree the switching frequency is critical (charge/discharge time of the capacitors and harmony with the load). 

When you turn to solid state switches, have to face with the body diode in MOSFETs, and the 1V or higher ON state voltage drops of the SCRs. Prepared for them?

...
May be there is something unusual that defies logical thinking with pulse circuits... inductive or otherwise!!
...

I wonder what you mean   
Afterall the referred patents may suggest a COP of 2 by doubling the run time for a load...  I now think the 'magic' is partly in the rechargable batteries's chemical processes.  If the battery is replaced with a charged up supercap in their patents circuits, do you think the load would still run for as long?   Well I doubt it with my common sense... though do not rule out without testing.

rgds,  Gyula

[gmeast]

Hi Folks,

The circuit in question came from John Bedini (1984 era), see Page 10 in the PDF file here: http://www.scene.org/~esa/merlib/Mueller.pdf

Also, you can find useful explanations on 1, 2, 3 and 4 battery systems here:
http://www.freeenergynews.com/Directory/Electromagnetic/TeslaSwitch/Tesla_Battery_Switch_PGFED.pdf
-------------------------------------------------
Regards,  Gyula

Hi all,

Isn't there something wrong with the fifth diagram down on this page? 

http://www.freeenergynews.com/Directory/Electromagnetic/TeslaSwitch/Tesla_Battery_Switch_PGFED.pdf

In this 4-battery config., aren't batteries 3 & 4 effectively OUT of the circuit?

If I'm wrong, please explain why because I thought I understood the Tesla Switch.

Greg

[gyulasun]

Hi all,

Isn't there something wrong with the fifth diagram down on this page? 

http://www.freeenergynews.com/Directory/Electromagnetic/TeslaSwitch/Tesla_Battery_Switch_PGFED.pdf

In this 4-battery config., aren't batteries 3 & 4 effectively OUT of the circuit?

If I'm wrong, please explain why because I thought I understood the Tesla Switch.

Greg

Hi Greg,

I think you are right, there is a misprint in that schematic. The correct way would be for the lower contact of the light bulb would connect to the common negative of bats 3 and 4 instead of their common positive shown?
Have not figured out.

rgds, Gyula