Ron Cole's Bipolar Switch

[Faraday88]

This thread is for discussing Ron Cole's Bipolar Switch from 1989 that was posted on John Bedini's web site.

Few questions spur in my mind...
1) John Bedini in his website did mention that he never used this circuit and also that there is something not correct about it! My immediate guess is about the 10 k pot in the emitter circuit of the 'Discharge -Transistor" why would you need a pot that high here??
2)The duty cycle control is not shown between(pin 6&7) of the 555 chip, it is essentially high ON time and Low -OFF time square wave.
3)There is an optimum value of the Resistance of the load for the circuit to work as per its principle.
4) The frequency is also critical as this changes with the given size of the battery.
5) How did Bill Nelson use Microwave frequency to this circuit? how is that a Cap as large as 30,000UF finds Resonant tuning at microwave Frequencies??
Rgds,
Faraday88.[/QUOTE][/QUOTE]

[Deuis]

If I remember the load was the universal motor.
This setup if fully mechanical, the switching is soldered into the commutators - no relays.
I will have to look back into why i designed the circuit that way.
I think the caps were there to minimize sparking on the commutators while also drip feeding back through the circuit.

I see, you can loose the diodes and caps if you do it like this:
https://youtu.be/KVdvvPDlagw?t=4m2s
there should be one more cap after the FWBR size depending on load...

[min2oly]

To be honest I cant remember, might be a typo.
Three years ago i put it down and haven't touched it since.
With a new workshop being completed it will be soon time to bring them out once again.
Problem I had with this machine is how to tune it, unless there is a simple way to find the resonance i need.

I see, you can loose the diodes and caps if you do it like this:
https://youtu.be/KVdvvPDlagw?t=4m2s
there should be one more cap after the FWBR size depending on load...

[Deuis]

To be honest I cant remember, might be a typo.
Three years ago i put it down and haven't touched it since.
With a new workshop being completed it will be soon time to bring them out once again.
Problem I had with this machine is how to tune it, unless there is a simple way to find the resonance i need.

Were you trying to produce AC with this one?

[min2oly]

Were you trying to produce AC with this one?

This was my effort at a Tesla Switch with brushes.
Driven by an independent universal motor doing up to 25,000 RPM's.
The segments on the commutator can be soldered to fit many different frequencies.
Alas very little testing was done before my break.


[ATTACH=CONFIG]5635[/ATTACH][ATTACH=CONFIG]5636[/ATTACH][ATTACH=CONFIG]5637[/ATTACH][ATTACH=CONFIG]5638[/ATTACH]

[John_Koorn]

This was my effort at a Tesla Switch with brushes.
Driven by an independent universal motor doing up to 25,000 RPM's.
The segments on the commutator can be soldered to fit many different frequencies.
Alas very little testing was done before my break.

Nice work John!

[Faraday88]

I am using 2 back to back yellow 5mm LEDs as the load. Here is the picture of my setup. The battery is 2 LI-Ion cells, connected in series and reads 7.36V battery voltage.






Well done, It is good to know that it does not make any noticeable difference, with the 555 timer circuit isolated. Now you are narrowing down the variables.

Have fun

Most
Kindest
Regards
Nityesh Schnaderbeck

Hey Nityesh,
Just a recommandation... Incandecent bulb or higher Wattage LED's should be used as the Load....
Rgds,
Faraday88.

[Deuis]

This was my effort at a Tesla Switch with brushes.
Driven by an independent universal motor doing up to 25,000 RPM's.
The segments on the commutator can be soldered to fit many different frequencies.
Alas very little testing was done before my break.

[Nityesh Schnaderbeck]

Congrats on getting your circuit running. What are you using for a load?

John K.

I am using 2 back to back yellow 5mm LEDs as the load. Here is the picture of my setup. The battery is 2 LI-Ion cells, connected in series and reads 7.36V battery voltage.

On your suggestion - yes I have run it with the timing circuit completely isolated and running off it's own battery. To be honest, I did not notice a difference.

John K.

Well done, It is good to know that it does not make any noticeable difference, with the 555 timer circuit isolated. Now you are narrowing down the variables.

Have fun

Most
Kindest
Regards
Nityesh Schnaderbeck

[John_Koorn]

Hi Nityesh,

Congrats on getting your circuit running. What are you using for a load?

On your suggestion - yes I have run it with the timing circuit completely isolated and running off it's own battery. To be honest, I did not notice a difference.

John K.

[Nityesh Schnaderbeck]

I have have this circuit up and running.



So far the battery voltage has remained frozen, (12hours later), With this circuit the battery is either charging of discharging, not both.

Hi Nityesh,
John_Korn Have you tried to completely isolate the 555 timer driver circuit, from the battery switching circuit, and run the 555 timer driver circuit on it's own power supply, with your Ron Cole Switch.
John K.

John_Koorn, I didn't explain the reason for my suggestion. The reason is, so that you have the most contrast between charging and discharging of the battery. The 555 Timer circuit is a small load, and it may reduce the contrast between charging and discharging of the battery. I would try to isolate the 555 timer circuit and run on it's own power supply. Then connect it back to how it was, to see if it changes your results.

Happy experimenting with your circuit board.

Most
Kindest
Regards
Nityesh Schnaderbeck

[John_Koorn]

Ah yes, there were some minor changes . These were mainly due to the fact that I had the parts on hand. I'm still experimenting with resistor values, just about across the board.

The "innovations" I have planned are mainly to do with the timing circuits - SG3524N or PIC based. However, I do like the way Ron has the optos connected.

Thanks for the tips on tuning the bias for the opto LEDs. that will come in handy

Anyway, I must get on to making the board. I'm a bit slower these days - got to make sure the bills are paid and the family is happy first

John K.

[Nityesh Schnaderbeck]

Hi Nityesh,

Not yet with the Ron Cole switch, but yes with previous experiments.

At the moment I'm still in the "replicate, don't innovate" mode

John K.

Remember that you changed some components from the original Ron Cole Bipolar Switch.

-: Replaced 10V zener diode with LM7812
-: Repalced 2N4919 with MJE2955T
-: Replaced MJ15022 with MJL21193G
-: Replaced MJ15003 with MJL21194G
-: Replaced 2N6306 with MJL21194G
-: Replaced 4N26 with H11D1

With the 4 battery Bedini Tesla Switch it was suggested to power the SG3524N circuit with an adjustable voltage regulator from 5V to 8V. I believe this is to adjust the brightness of the LEDs inside the H11D1 opto-couplers.

With my Tri-Symmetrical 3 Battery Tesla Switch I had to use the correct value of resistance in series with 3 opto-coupler LEDs for clean switching. My driver circuit with the supply voltage of 5V, a 200ohm resister worked the very best. If I went to 100ohm = very bad switching, 300ohm = bad switching & 200ohm = good switching.

The 4N26 and H11D1 are different opto-isolators. You can check the voltage drops across the collector and emitter, of each transistor to check if they are fully saturated, when turned on, and an open circuit when switched off. So start with tuning the bias of the LEDs, either from adjusting the voltage to the 555 Timer driver circuit, or adjust, the series resistor (in series with the opto-isolator LEDs).

I just wanted to tell you about my experience of getting the H11D1 to switch the best, and hope this info is useful.

Most
Kindest
Regards
Nityesh Schnaderbeck

[Gary Hammond]

.............The concept of the switch is fairly simple:-
1. Charge two capacitors in parallel through the load from the battery.
2. Discharge the same capacitors in series through the load to re-charge the battery.

The idea being that you can power the load for longer than if you just ran the load "normally".

John K.

Oscillating power between a source and a storage device, while making it do work in both directions! Sort of reminds me of Jim Murray's SERPS device.

[John_Koorn]

Hi James, it's similar to a TS - but with one battery. The name (Ron Cole Bipolar Switch) comes from the name of the schematic that John Bedini has had on his web page for years, which is post #1 of this thread.

The concept of the switch is fairly simple:-
1. Charge two capacitors in parallel through the load from the battery.
2. Discharge the same capacitors in series through the load to re-charge the battery.

The idea being that you can power the load for longer than if you just ran the load "normally".

John K.