My Replication of Bedini Solid State SSG without any trigger coil or Pulsing circuit

[Wistiti]

Hi Wistiti,

The simplest high current reed switch could be "mimicked" by using two MOSFETs in series and controlling their tied together gates and sources by the low current reed switch. The series MOSFETs constitute a bidirectional switch because the channel resistances (when they are ON) are able to conduct current in both directions so AC currents would not be problem but the body diodes would still be a problem. To solve the latter problem, two MOSFETs are used which are connected in series, with their sources in a common point. this way any one of their body diodes are always reverse biased for any AC polarity, see my drawing attached to this post here: Shorting coil gives back more power
The MOSFET types are two N-channel ones (IRF640, 200V 18A, max drain-source ON resistance is 0.18 Ohm). Of course there are many other types you can choose from. There are several types with less than 0.1 Ohm ON resistance and still with over 200V drain-source breakdown voltage (these values add up due the series connection).
IF you use this bidirectional switch in a mains AC circuit, make sure to use a galvanically isolated DC voltage source for the gate-source control circuit where a 9 or a 12V battery is shown in the schematic. Of course in such cases an opto coupler could also be used, together with a MOSFET driver IC.

Gyula

Thank you Gyula for your input!
I will give it a try. Yesterday i rebuilt the circuit as shown in the begenning of this tread. At the start. it work like a charm; but i let it run without surveillance for about 1 hour and when i look at it the reed switch have stick close and it burn some component in the circuit and drain down the source batt...

So for everyone how try this circuit, alwais keep an eye on it if you dont whant to start a fire!!

[gyula]

I am looking for better "evey duty" reed switch...
If some one have some sugestion...

Hi Wistiti,

The simplest high current reed switch could be "mimicked" by using two MOSFETs in series and controlling their tied together gates and sources by the low current reed switch. The series MOSFETs constitute a bidirectional switch because the channel resistances (when they are ON) are able to conduct current in both directions so AC currents would not be problem but the body diodes would still be a problem. To solve the latter problem, two MOSFETs are used which are connected in series, with their sources in a common point. this way any one of their body diodes are always reverse biased for any AC polarity, see my drawing attached to this post here: Shorting coil gives back more power
The MOSFET types are two N-channel ones (IRF640, 200V 18A, max drain-source ON resistance is 0.18 Ohm). Of course there are many other types you can choose from. There are several types with less than 0.1 Ohm ON resistance and still with over 200V drain-source breakdown voltage (these values add up due the series connection).
IF you use this bidirectional switch in a mains AC circuit, make sure to use a galvanically isolated DC voltage source for the gate-source control circuit where a 9 or a 12V battery is shown in the schematic. Of course in such cases an opto coupler could also be used, together with a MOSFET driver IC.

Gyula

[Wistiti]

I am looking for better "evey duty" reed switch...
If some one have some sugestion...

[Wistiti]

i have re-built the circuit with a new reed switch tonight and i am still amaze with it...

[Wistiti]

does someone else play with it??

[maxc]

So far i'm finding out that you do not need diodes for a spark gap sg moter. If the battery has the same voltage tomorrow morning the Newman thread will begin.
So far ac amps tested with Fluke 115 average .020 too .025 going back too battery, same going to moter. dc amps bouncing all over.

Can't go by dvm meter it lies with all the spikes. Been working on more important projects.
I made up a simple self rocking switch. My batterys were dead. I They came back too life from 6 volt(that's 3 6 volt 7ah 1 (4.6ah)too 10 volt as i type. I keep turning the frequency down( best 15cps) as the voltage gos up.
NO BS!
mark

[HansKammler]

Conrad Style Bedini Reed Charger



yep, it works like a charm.
quick glued togheter with parts i found in the junkbox.
4007 diodes, BD243C, NE2 neon lamp, a coil of wire (100 meters) and some
croco plugs.

Its charge the leaded seal battery from 10.41V to 13.7 in just 45 mins.
impressive.

the magnet should be moved towards the reed but stop before NE2 is lit.


outstanding !


Yes I know the wires are too small for efficient charging, but it was just a test.
the final one will be made of a Litz Wire coil and big supply wires to/from battery.

thanks Conrad for the parts

[maxc]

This weekend I'm testing my thoriated tungsten/ carbon graphite reed switch. No spinning magnets too impede flux change.
I had 100 volt+ across the reed switch when turning on the transister.

[HansKammler]

explanation of the reedswitch effect

wow ! nice project. Thanx for sharing !

you got this awesome radiant spikes because the reedswitch is small,
the spring contact very light (weight) so they can switch faster than a car relais or similar.

The effect you descibe depends on the Resistance of your switch,
you build as I can see a small magnetically driven transistor

[BroMikey]

Keep me up to date on your progress.

I like to hear all results of your hard work.

This is valuable to all members.

[maxc]

Hi Max

I like your post but I do not understand it. Could you explain to
me what you might be experimenting with. Do you have a Bedini
wheel? Moter?

Mikey

Bedini wheel moter. It stop at 5 am. Respun going again.

[BroMikey]

So far i'm finding out that you do not need diodes for a spark gap sg moter. If the battery has the same voltage tomorrow morning the Newman thread will begin.
So far ac amps tested with Fluke 115 average .020 too .025 going back too battery, same going to moter. dc amps bouncing all over.

Hi Max

I like your post but I do not understand it. Could you explain to
me what you might be experimenting with. Do you have a Bedini
wheel? Moter?

Mikey

[maxc]

So far i'm finding out that you do not need diodes for a spark gap sg moter. If the battery has the same voltage tomorrow morning the Newman thread will begin.
So far ac amps tested with Fluke 115 average .020 too .025 going back too battery, same going to moter. dc amps bouncing all over.

[BroMikey]

Works great on my 3000 foot #20 gauge wire Newman coil.
It lite up both of my thoriated tungsten/ carbon spark gaps. An inch and a quarter long and 0.020 wide.
The coil backkicks 2200 volt threw a 2meg load when measured on scope.
Just wait till I start a thread on this.

I have heard very little about the newman. Glad to see someone
did it. Like the very very very long twisted wire coils, such as a
window motor of SSG as compared to running a very short coil
resistance changes the action of the circuit.

I am new and what I see is that the longer the wire coil is, the less
power needed to reach resonance. Of of course my 100ma coils don't
do much work but they resonant at 100ma.

AND the longer wire coils give back such high voltage spikes the
transistors have to be changed out to high voltage transistors.

The internal resistance of a high voltage transistor is much higher
thereby burning up extra power I thought I might be gaining.

However I hear that the spike/event makes it worth it all if it can
be properly harnessed on the back end.

Other than this short discourse, I do not understand the goals.
Newman like Bedini's work was suppressed and still is today. These
inventors did the best that they could.

Beyond that making a new thread might give enough detail to
understand the rational of why your design works or doesn't.
Naturally we all would like it to work.

Understanding the goals and strategy used to get to the desired
end of extra energy is difficult due to terminology viewpoint.

Some call it BEMF some say CEMF, and the list goes on for a while.

One inventor I know says that the key to getting the extra is
the capture of the collapsing field so he says fast diodes, one
behind the other helped him a great deal.

Have you ever used fast diodes?

Mikey

[maxc]

reed self oscillating

Works great on my 3000 foot #20 gauge wire Newman coil.
It lite up both of my thoriated tungsten/ carbon spark gaps. An inch and a quarter long and 0.020 wide.
The coil backkicks 2200 volt threw a 2meg load when measured on scope.
Just wait till I start a thread on this.