Joule Thief

[Mk1]

@jeanna

You know that when you put coils in series you need to test the voltage to be sure there connected in the right phase , the same is true when connecting 2 pair of coil together , like in the circuit, so make sure you send the positive of the bridge the right way in the second pair.

But for the signal pushing and pulling , the crosswind (up and down) dose that not the feedback.

The only mistake so far is to have explained it first like i remembered , but i am not sure since the drawing (schematic)is where i got the idea , and i explained it wrong , but the drawing should be good since that is what i did to get results.
Now it could also be that i did not do the connection like the drawing and got good result by mistake , probably not.

Mark

[altrez]

Wow I can hardly keep up with this thread! It looks like everyone is working very hard to move everything forward. I am still working away on my first two pick up coils and so far it seems to me that adding more pickup coils really does not give any more power.

Is that true or have I totally missed the target? I can light no more LEDS with 2 then I can with one? And in fact it seems they get dimmer on the second coil? I was planing on rectifying the AC on the very end of my LED bank back to DC and pulsing that into a battery. I have plans on switching the power from battery to battery to see if I can keep the light shining so to speak.

Has anyone else worked in that direction? My idea is simple with a micro controller I can make a switch that will read the voltage on the wire. As soon as it hits a certain voltage it will switch to the next battery that should be fully charged. At that time the old battery will trickle charge from the back end of the circuit.


Thank you all so much

[nievesoliveras]

@all
Here is my first efforts using TinyCAD to make a circuit diagram.
I need to give arknowledgement to the original circuit maker as I used his to make this one so I wrote the thanks inside the png file itself.

My thanks to those who sent in suggestions on how to convert and attatch to the forum pages.
TA

jim

I am grateful that you are my friend, but the truth is that the circuit is not mine, is @mk1's. The credit should go to him.

Hi Jesus,
I think the part that has me most confused is the ac part.

MK1 shows a load coming off the ac end of the bridge.  He indicated that is the meter. When I use the meter in this spot as drawn, I get a lower voltage than when the 4 wires are not connected to the bridge. ??

But first let me describe what I have:

Each wire pair shows about 75 to 79 volts.

Then, before I made the bridge connection, I put all 4 wires in series. Like that, I see around 108 volt. So, I believe there is some reduction from I guess phase canceling.

OK so, after I checked that, I disconnected the series connection of the 4 wires and I was back down to 2 pairs of wires each one showing 75 or 79 volts again.

I put one pair on the dc ends of the bridge and the other pair on the ac ends of the bridge.

On the + end of the bridge I get 37volts
On the - end of the bridge I get 51volts
On one of the ac ends I get 3volts
on the other of the ac ends I get 47volts.

These are readings I did over and over. Many times a wire was loose or detached and I did the reading again. I never got close to 100volts through this bridge and certainly never got the sum of the 2 separate wires which would have been 150volts.
MK1 says he gets both ac and dc from this bridge. I am interested in keeping the ac.

Have you made a MK2?
What are your results so far?

thank you,

jeanna

edit add- good drawing esp for a first one, jim.!

The sad thing is that I have not been able to understabd fully the principle @mk1 tries to explain. I am confused and tired of studying an electronics course from RS.

Wow I can hardly keep up with this thread! It looks like everyone is working very hard to move everything forward. I am still working away on my first two pick up coils and so far it seems to me that adding more pickup coils really does not give any more power.

Is that true or have I totally missed the target? I can light no more LEDS with 2 then I can with one? And in fact it seems they get dimmer on the second coil? I was planing on rectifying the AC on the very end of my LED bank back to DC and pulsing that into a battery. I have plans on switching the power from battery to battery to see if I can keep the light shining so to speak.

Has anyone else worked in that direction? My idea is simple with a micro controller I can make a switch that will read the voltage on the wire. As soon as it hits a certain voltage it will switch to the next battery that should be fully charged. At that time the old battery will trickle charge from the back end of the circuit.

Thank you all so much

That is a nice idea. The use of a microcontroller to switch batteries. If you make a schematic, please post it here.

Jesus

[nievesoliveras]

@jeanna and @mk1 and anyone that wants to join us.

Let us clarify this @mk2 toroid configuration for everybody.
Remember this will be for the future generations, and for us.

Just save this graphic as .bmp and change it on paint with your ideas. Then save it on paint as .jpg and post it. I will do the same with your answer till we get it understandable for everyone.

Jesus

[xee2]

@ nievesoliveras

I think the idea of a diagram is great. This should help a lot. But, the diodes as shown in your diagram block both DC and AC from going through the circuit. They are equivalent to an open circuit. I assume you are going to attach something to the DC outputs of the diode bridge.