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Author Topic: DIY Tesla Switch Guide  (Read 90717 times)

pese

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Re: DIY Tesla Switch Guide
« Reply #45 on: March 11, 2010, 12:22:13 PM »
@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

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Re: DIY Tesla Switch Guide
« Reply #46 on: March 11, 2010, 09:55:37 PM »
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

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Re: DIY Tesla Switch Guide
« Reply #47 on: March 11, 2010, 11:52:24 PM »
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?

Quote
...
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

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Re: DIY Tesla Switch Guide
« Reply #48 on: March 12, 2010, 12:16:37 AM »
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

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Re: DIY Tesla Switch Guide
« Reply #49 on: March 12, 2010, 12:48:11 AM »
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

gmeast

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Re: DIY Tesla Switch Guide
« Reply #50 on: March 12, 2010, 12:56:23 AM »
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

Yes ... and more than that.  BOTH the + bus and - bus in this parallel connection of batts 3 & 4 must be connected to something or it's still OUT of the circuit.

Anyone else?  Thanks,

Greg

geotron

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Re: DIY Tesla Switch Guide
« Reply #51 on: March 12, 2010, 08:13:05 AM »
Quote
crowclaw meant the lower relay contact
goes directly down to the negative battery polarity, ok?

- Ok... as shown? My interpretation of GND is (-)

Quote
The 1 kOhm
and its connection is ok to the upper relay contact.

||||

The 12V
goes directly to the timer input of the Tesla switch
via the 1 kOhm
and whenever the relay is fired, the timer input
is connected to

the negative polarity instead of the +12V.

So besides my previous lower relay connection I have correctly
illustrated the correct way to time this device?


Quote
In your drawing the wire from the lower relay contact
now goes to the 1000uF capacitor,  this is wrong

that wire should go to the GND instead
of the cap.

The GND below the cap, or as I have connected below,
to the one on the timer circuit?

gyulasun

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Re: DIY Tesla Switch Guide
« Reply #52 on: March 12, 2010, 09:35:13 AM »
@geotron

Yes, that is how crowclaw meant connecting the timer output to the input of the T switch.  The two GNDs are also connected of course.

crowclaw

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Re: DIY Tesla Switch Guide
« Reply #53 on: March 12, 2010, 12:00:06 PM »
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?

rgds,  Gyula

Hi Gyula,

Yes your right of course about using solid state device types! sometimes my ideas surpass logical thought processes. The caps I have had kicking around for years and I don't remember how I came by them... they are 18000uf @ 30v with screw caps and rather large. I have three of them being used for this experiment. Yes the timing is critical as two in parallel across 12volts to charge up takes quite an initial drain... they are then discharged in series across the battery as per diagram.

If any one else wants to jump in with thoughts and suggestions please feel free. Regards

geotron

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Re: DIY Tesla Switch Guide
« Reply #54 on: March 17, 2010, 07:25:55 AM »
It's a bit crooked, but this is my working model of the
Louis Pollaehn timer.

I have labeled the components to the best of my
visual interpretation - the resistor between pin 5
of cd4011 and the 1M speed control was guessy, as
well as the one by 2n2222.

The high speed diode ? - across from the relay
is curious... Would a 1N914 work?

Groundloop

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Re: DIY Tesla Switch Guide
« Reply #55 on: March 20, 2010, 10:27:56 PM »
@All,

I have soldered my new replica of the Bedini/Brandt Tesla switch.
Next job will be mounting the board into a suitable enclosure.
I estimate to run the first tests next weekend.

Groundloop.

Groundloop

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Re: DIY Tesla Switch Guide
« Reply #56 on: March 21, 2010, 01:20:42 PM »
@geotron,

Attached is my version of the 4011 oscillator circuit.

Groundloop.

DreamThinkBuild

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Re: DIY Tesla Switch Guide
« Reply #57 on: March 21, 2010, 03:11:46 PM »
Hi Groundloop,

Professional circuit design as always. I just wanted to know the significance of keeping pins 8+9, 12+13 (on the NAND) actively low? Brings back memories of building gates with discrete components, everything now seems to be a single chip FPGA. :)

mscoffman

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Re: DIY Tesla Switch Guide
« Reply #58 on: March 21, 2010, 06:12:12 PM »
Hi Groundloop,

Professional circuit design as always. I just wanted to know the significance of keeping pins 8+9, 12+13 (on the NAND) actively low? Brings back memories of building gates with discrete components, everything now seems to be a single chip FPGA. :)

I can answer that.

That chip is a 4011 CMOS complimentary metal oxide semiconductor chip.
Spare inputs on cmos must be connected or they float to center of their
range and gate outputs can begin to switch due to the high gain of cmos
logic stages. Both hi/lo parts of a gate's output can come on simultaneously
ruining the cmos low power profile by using more power than the whole
rest of the circuit.
 
:S:MarkSCoffman

Groundloop

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Re: DIY Tesla Switch Guide
« Reply #59 on: March 21, 2010, 06:21:15 PM »
@DreamThinkBuild,

Eagle Cad always "nag" me of unused input pins. :-)
(High input impedance + static electricity = burned chip.)

Yes, the gated arrays chips is great but old school TTL is still in production.
A micro controller and some TTL's is still useful for small projects. :-)

Edit: @mscoffman is also correct. :-)

Groundloop.