Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Custom Search

Author Topic: DIY Tesla Switch Guide  (Read 90715 times)

geotron

  • Full Member
  • ***
  • Posts: 118
DIY Tesla Switch Guide
« on: March 05, 2010, 07:23:11 AM »
Hello everyone - I've been looking around here for a
while now and must admit it is very interesting!

I've been studying this diagram-schematic, and without entering
into a complex range of tests and whatnot would simply like to
build it the way it appears in the below pic (now a link). While in
the process of doing so, I will of course document everything and
compose a Guide that may be followed with success by anyone
with the desire and parts.

I am not totally versed in the language of electronics, but have an
eye for detail and a willingness to learn. My current range of
questions will be posed in a standard format below.

I'm glad to be here, and hope to construct many projects in my stay!

http://www.frontiernet.net/~gopatrope/OverUnity/tesla-switch-transformers.jpg

Q's

1) The Timer Input  - I realize there are solid-state timers as well
as mechanical timers. This project will utililze a solid state timer, but
as one may observe, this component is missing. I've got some other
diagrams laying around that show how to construct one, but even
still I'm not sure about how it would be attached.

2) I would like to embed photos in this thread, but it doesn't
seem to let me with the correct img tags...  ??

3) The transformers - I was trying to source these, and didn't come up
with squat. There must be something I don't know about them, like are
they handmade, or out of production?

crowclaw

  • Sr. Member
  • ****
  • Posts: 327
Re: DIY Tesla Switch Guide
« Reply #1 on: March 05, 2010, 08:56:31 AM »
Hello everyone - I've been looking around here for a
while now and must admit it is very interesting!

I've been studying this diagram-schematic, and without entering
into a complex range of tests and whatnot would simply like to
build it the way it appears in the below pic (now a link). While in
the process of doing so, I will of course document everything and
compose a Guide that may be followed with success by anyone
with the desire and parts.

I am not totally versed in the language of electronics, but have an
eye for detail and a willingness to learn. My current range of
questions will be posed in a standard format below.

I'm glad to be here, and hope to construct many projects in my stay!

http://www.frontiernet.net/~gopatrope/OverUnity/tesla-switch-transformers.jpg

Q's

1) The Timer Input  - I realize there are solid-state timers as well
as mechanical timers. This project will utililze a solid state timer, but
as one may observe, this component is missing. I've got some other
diagrams laying around that show how to construct one, but even
still I'm not sure about how it would be attached.

2) I would like to embed photos in this thread, but it doesn't
seem to let me with the correct img tags...  ??

3) The transformers - I was trying to source these, and didn't come up
with squat. There must be something I don't know about them, like are
they handmade, or out of production?
Hi Geotron:

Welcome to this site, you'll find plenty here to keep your mind occupied and hands busy with projects. Hmmnn,I haven't studied the circuit in any detail but it is certainly unusual and interesting, so at some stage I will Analise it it in more detail when I get more time. The transformers are typically valve type audio output transformers I would guess as 8 ohms was a standard speaker matching impedance for the secondary. The primary matched the higher output impedance of the valve anode circuit. (Note valve... UK term, tube US term) Valve equipment was very popular many years ago. Old valve radio's may be the best source for them. As for a timer circuit I recommend using a 555 IC. Plenty of information available and easy to construct... build one that allows a good variable frequency range and mark/space ratio. A timer of this nature will prove most usefull for many other projects too. The 555 will work on various supply voltages also. This circuit operates at low frequencies i would say as the transformers will be laminated core devices.
BTW who put the circuit together as drawn and presented in the posting?
 Have fun... Kind regards

gyulasun

  • Hero Member
  • *****
  • Posts: 4117
Re: DIY Tesla Switch Guide
« Reply #2 on: March 05, 2010, 12:01:37 PM »
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

However see Peter Lindemann explanations in this Forum in his Reply#16 and #18:

http://www.energeticforum.com/renewable-energy/962-use-tesla-switch.html

This latter link started in August, 2007.  John Bedini appeared in it last  November too, you may wish to read him too from Reply#447:

http://www.energeticforum.com/renewable-energy/962-use-tesla-switch-15.html

Regards,  Gyula

starcruiser

  • Hero Member
  • *****
  • Posts: 693
    • Starcruiser's Place
Re: DIY Tesla Switch Guide
« Reply #3 on: March 05, 2010, 03:11:23 PM »
The transformer in question is a standard audio transformer that can be found at Radio Shack here in the US I bought several of these recently for another project, they were like $3.00 USD if I recall

crowclaw

  • Sr. Member
  • ****
  • Posts: 327
Re: DIY Tesla Switch Guide
« Reply #4 on: March 05, 2010, 10:37:07 PM »
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

However see Peter Lindemann explanations in this Forum in his Reply#16 and #18:

http://www.energeticforum.com/renewable-energy/962-use-tesla-switch.html

This latter link started in August, 2007.  John Bedini appeared in it last  November too, you may wish to read him too from Reply#447:

http://www.energeticforum.com/renewable-energy/962-use-tesla-switch-15.html

Regards,  Gyula
Hi Gyula,

Thanks for putting up these links they make very interesting reading and provide a sound understanding of the schematic in question. Regards

geotron

  • Full Member
  • ***
  • Posts: 118
Re: DIY Tesla Switch Guide
« Reply #5 on: March 06, 2010, 04:08:12 AM »
----------------------------------------------------------

http://www.energeticforum.com/renewable-energy/962-use-tesla-switch.html

Dr.Lindemann states in reply #2 that the "SG 1524 dual flip-flop"
timer was used.  How does this one differ from a 555 IC?

Also, the diagram I've attached has me curious as well.
I haven't much clue on how these work - battery powered?

----------------------------------------------------------

Well I guess that besides the various component parts for this
project, the only things I will need to source are -

1) A suitable board to solder things onto.
2) A test meter
3) Soldering Wire
4) A set of four 12v batteries
5) High-Voltage Cables

Additionally I am open to suggestion in this area.

I've had plenty of experience working with metal in a
welding fabrication environment, so perhaps some of it
will bleed through into my work here.

I was kind of thinking that to start out with, perhaps
a set of rechargeable NiMH AA batteries might simplify
things a little... although I have no idea how this
might change my set of required component parts - besides
maybe having smaller diodes.

My plan will remain the same throughout to precicely
duplicate the schematic as presented... After which
providing it works (which I don't much doubt), I will
likely be in a much better position to handle the
construction of different models without so many
questions.

geotron

  • Full Member
  • ***
  • Posts: 118
Re: DIY Tesla Switch Guide
« Reply #6 on: March 06, 2010, 09:22:52 AM »
Here's a nice analog one I'm considering...

Perhaps small individual meters would
prove to be of unique convenience. I know
I've seen them somewhere...

geotron

  • Full Member
  • ***
  • Posts: 118
Re: DIY Tesla Switch Guide
« Reply #7 on: March 06, 2010, 09:25:43 AM »
I see that this might be something I could wire up
by myself.  If so, I may just forgoe ordering one. (edit: make that six)

A local source would be nice - are these commonly found in
at audio shops?
« Last Edit: March 06, 2010, 09:53:47 AM by geotron »

gyulasun

  • Hero Member
  • *****
  • Posts: 4117
Re: DIY Tesla Switch Guide
« Reply #8 on: March 06, 2010, 05:20:01 PM »
Hi Geotron,


http://www.energeticforum.com/renewable-energy/962-use-tesla-switch.html

Dr.Lindemann states in reply #2 that the "SG 1524 dual flip-flop"
timer was used.  How does this one differ from a 555 IC? 

Here you can see SG3524 incl SG1524 and 2524) data sheets, they are still available.
http://www.datasheetcatalog.com/datasheets_pdf/S/G/3/5/SG3524.shtml
The type number difference denotes commercial, industrial (temperature) ranges, no problem for tinkering, you can use SG3524 as the cheapest type, most component sales have them like farnell.com  digikey.com  futurlec.com  etc 
I do not think you would need to replace the SG3524 with a 555 timer, the former is available for $ 2-3 apice.

Quote
Also, the diagram I've attached has me curious as well.
I haven't much clue on how these work - battery powered?   

The CD4011 is a quad CMOS NAND gate and a simply RC oscillator is formed with it, the oscillator frequency is adjustable by the potmeter. Yes it needs a DC voltage source like a battery or a small power supply like a wall-plug-in with DC output voltage of 8-12V, depends on the relay coil too.
The MC7805 is a DC voltage stabilizer with a fixed 5V output, the CD4011 is fed by it, helps stabilize the RC oscillator frequency vs input DC voltage fluctuations.


Quote
I was kind of thinking that to start out with, perhaps
a set of rechargeable NiMH AA batteries might simplify
things a little... although I have no idea how this
might change my set of required component parts - besides
maybe having smaller diodes.

My plan will remain the same throughout to precicely
duplicate the schematic as presented... After which
providing it works (which I don't much doubt), I will
likely be in a much better position to handle the
construction of different models without so many
questions.

Well, regarding the four battery type I do not know if NiMH is ok or not, in 1984 the used types must have been lead acid batteries.  The diode type surely depends on the currents involved and the currents depend on the battery AmperHour capacity first, this is the main focus with diodes (and cables). No much need for HV cables, rather for high cross section area ones between the batteries but as I indicated it all depends on AmperHour capacity.

Re on you analog multimeter, it seems ok and it is able to measure DC (and probably AC) currents too. 

rgds,  Gyula

Groundloop

  • TPU-Elite
  • Hero Member
  • *******
  • Posts: 1736
Re: DIY Tesla Switch Guide
« Reply #9 on: March 06, 2010, 09:13:35 PM »
@geotron,

All the parts needed to build a close replica of the Tesla Switch can be bought from:

http://www2.mouser.com/Home.aspx

Here is the hard to find parts:
   
Mouser No:    511-SG3524N    
Mfr. #:    SG3524N
Manufacturer:    STMicroelectronics
Desc.:    Voltage Mode PWM Controllers Regulated Volt Mode

Mouser No:    863-MR852G    
Mfr. #:    MR852G
Manufacturer:    ON Semiconductor
Desc.:    Rectifiers 200V 3A Fast

Mouser No:    42TL013-RC    
Mfr. #:    42TL013-RC
Manufacturer:    Xicon
Desc.:    Audio & Signal Transformers XFMR 1KCT/8CT

Attached is the circuit that Mr. Bedini and Mr. Brandt made back in August 1984.

@gyulasun,

I think Mr. Bedini did use NiCad AA batteries for the "Sigar box" test circuit.

Regards,
Groundloop.

gyulasun

  • Hero Member
  • *****
  • Posts: 4117
Re: DIY Tesla Switch Guide
« Reply #10 on: March 06, 2010, 09:54:52 PM »
Groundloop,

Thanks for the info,  I was 'blind' and did not notice the 5V AA NiMH battery label written in the same schematic I also referred to in my first answer above in this thread.

There is another issue you may be able to comment, that is the pin numbering of the SG3524 in the schematic: if you take a look at the schematic you uploaded, then the pins start from the upper left corner of the IC symbol as 1, and downwards as 2 and then comes a 9?  I cannot make it out as a 3 as it should be if it were in an increasing order. 
Pin 9 is the Compensation output and pin 3 would be the oscillator output which latter has no much sense in this circuit's case but there is sense for the compensation with the RC members tied to pin 9 as shown.
So I think the third pin under the 1st on the left side is really pin 9 and not a misprint.  Agree?

Thanks,  Gyula

Groundloop

  • TPU-Elite
  • Hero Member
  • *******
  • Posts: 1736
Re: DIY Tesla Switch Guide
« Reply #11 on: March 06, 2010, 10:22:32 PM »
@gyulasun,

Attached is a crop from my Tesla switch project. I think I have got
the correct pin outs. I think the biggest problem is to get the audio
transformers orientated the correct way. The 1K impedance must be
between the base and emitter and the 8 Ohm impedance out to the IC.

But what ways must the transformer "dots" be orientated?

Here is a link to my Tesla project (zipped file with all documentation):
http://home.no/ufoufoufoufo/
plus images of the circuit drawing and pcb.

I have not started to build this yet, need to know if I got the transformers the right
way around first.

Groundloop.


gyulasun

  • Hero Member
  • *****
  • Posts: 4117
Re: DIY Tesla Switch Guide
« Reply #12 on: March 06, 2010, 11:31:36 PM »
Hi Groundloop,

I agree, your IC pin outs are correctly connected.

And I think also your present connection for the transformer pins are
also correct.  Here is a data sheet for the 42TL013 center tapped audio
transformers: http://www.dspradio.org/files/42TL013-RC.pdf

It shows a phase reversal between primary-secondary and if you connect the dotted pin 4 of its secondary directly to pin 14 of the SG3524 and the signal waveform at the IC pin 14  ,say, goes positive, with respect to transformer pin 6 which is AC grounded via C8, then the transformer pin 1 on the primary side (also dotted) is correctly connected to the base of the npn switching transistor to open it with the positive pulse with respect to primary pin 3, connected to the emitter.
Regarding the other emitter output of the IC, pin 11, it also seems correctly connected but you used the undotted trafo pins, this is not a problem of course.
I believe the rule would be: if a dotted secondary trafo pin goes to IC output pins 11 or 14, then the dotted primary pin of the trafo should go to the base of the npn transistor and the same is true for the undotted secondary pin if you choose that way. 

I did not check your printed circuit board wrt the transformer connection but the schematic only.
Hopefully all the transformer pinouts are uniformly manufactured.

rgds,  Gyula

Groundloop

  • TPU-Elite
  • Hero Member
  • *******
  • Posts: 1736
Re: DIY Tesla Switch Guide
« Reply #13 on: March 06, 2010, 11:42:03 PM »
@gyulasun,

Thanks for taking time to check my circuit drawing and also for the data sheet link.
I have checked that the pcb is correct vs. the circuit drawing. So now I will order
some pcbs and parts to this project. I have designed the pcb to fit inside a Hammon 1455L1601
metal box.

Thanks,
Groundloop.

geotron

  • Full Member
  • ***
  • Posts: 118
Re: DIY Tesla Switch Guide
« Reply #14 on: March 07, 2010, 03:50:34 AM »
Concerning the 1N914 rectifier diodes, GroundLoop - I see
the one you have listed is a 200V 3A 300ns, while the specs for
the 1N914 are 100V 4A 4ns.
http://www.mouser.com/Search/ProductDetail.aspx?R=1N914virtualkey51210000virtualkey512-1N914

#######################################

I've sourced the 1000MF capacitors at a few different
stores, and have found quite a price range to choose
from. At Ralph's they've got 1000MF 50V Aluminum ones
for 1.66USD with +/-20% tolerance....
http://www.ralphselectronics.com/ProductDetails.aspx?itemnumber=SPRA-516D108M050QS6A&source=googleps

While at AllElectronics.com they've got something
by the name of '1000MFD 50V Radial' with no additional
information - http://www.allelectronics.com/make-a-store/item/1000R50/1000MFD/50V-RADIAL/1.html

Groundloop - I see that your capacitors are labeled with
the uF designation Vs. MF - are these two designations interchangeable?

###########################################################

Additionally I will need a board for all of these things to
reside on, and was considering the selection over at AllElectronics.com
again. They've got a small range of different sizes to choose from,
most being about 6 x 4in -
http://www.allelectronics.com/make-a-store/category/455/Perf-Boards/1.html

Would one of these provide enough space by itself for the
Tesla Switch circuitry and Timer, or should I get a smaller
board as well for the latter?

I still haven't drawn out the timer schematic, so over the next
day or two I'll be finishing that. My work will result completely from
drawings made by hand, so as to avoid any guesswork.

Groundloop - in the original schematic from my first post, there
is a single connection from the Timer into the first series of
rectifier/transformer/transistor apparatus, while in the version
you have posted with the addition of the SG3524 this is not the
case. Forgive my ignorance, but I must ask why...