@nievesoliveras,

Thank you for the drawing.

Here are the design criteria:

A battery capacitor is being charged by a JT via a single germanium diode.
The battery capacitor is sharing the "ground" (e.g. minus pole) with the AA battery.

When the battery capacitor is charged to 2,6 Volt then:

1. JT is disconnected
2. Some feedback from the battery capacitor to the AA battery to keep it topped up.
3. Battery capacitor is discharged into load.
4. The discharge circuit must withstand a LOT of ampere.
5. When the battery capacitor reaches 0,5 Volt then stop discharging
6. Connect JT
7. Repeat from above.

Another design criteria must be that the circuit does not load the battery capacitor or the battery
during the charging cycle.

If anyone can make such a circuit then I'm all ear. I was very close with my circuit solution but
it did not work on 2,6 Volt. It was also unstable due to the relays. I will look more into this the next
weekend if I find time.

Alex.

@Jesus . We are trying to adapt this circuit to a JT  for the prize . Can this circuit be adapted to a normal JT ? . The purpose Of Alex's Circuits are to monitor the run battery and top it off what the Charge Bcap is above the battery in both volts and amps. . There are other ways to charge these bcaps . If you could and have built the circuit you describe could you measure the volts and current on the out put . the cap is basically a dead short in any circuit so an amp meter will represent the bcap as it is also a short . .

Albert

@nievesoliveras,

Thank you for the drawing.

Here are the design criteria:

A battery capacitor is being charged by a JT via a single germanium diode.
The battery capacitor is sharing the "ground" (e.g. minus pole) with the AA battery.

When the battery capacitor is charged to 2,6 Volt then:

1. JT is disconnected
2. Some feedback from the battery capacitor to the AA battery to keep it topped up.
3. Battery capacitor is discharged into load.
4. The discharge circuit must withstand a LOT of ampere.
5. When the battery capacitor reaches 0,5 Volt then stop discharging
6. Connect JT
7. Repeat from above.

Another design criteria must be that the circuit does not load the battery capacitor or the battery
during the charging cycle.

If anyone can make such a circuit then I'm all ear. I was very close with my circuit solution but
it did not work on 2,6 Volt. It was also unstable due to the relays. I will look more into this the next
weekend if I find time.

Alex.

I have not built the circuit. But I got it from a Nebo flashlight I opened to see how it charged the running battery when you move the hand crank without disturbing the light. It uses the battery and charges it at the same time. The battery is a 3v flat battery like the ones inside a computer motherboard.

I made a schematic of the working and pulled out just the part I posted which can be run with a joule thief to charge a cap and after the 1.5v is reached on the capacitor and the zener senses it it will fire the transistor wich will short the cap and discharge its contents onto the source battery.

This circuit can work apart from the circuit of the 650F cap.

Jesus

This is a simpler solution but the parts must be of a quality to withstand the amperage you mentioned.

This is used on the wind turbines as a shunt regulator. Maybe it works on your project.

Jesus

ok i get it . so i could put a 2.5 volt zener on the cap output and when it reached that it would fire the cap into the battery . Well i could go further and put a 1.6 volt zenar in series with the battery to keep it from over charging . I see the problem and the Bcap not wanting to release the scr  after it reaches 2.5 volts because it is so much higher and wont take that long before the battery fries with that amount of amperage across the AA cell . It Might work on a cap to cap system thought . I will see if i can build this and report whats it doing . Anyway Very Good Suggestion and Alex will probably consider this one or maybe already has .

Thanks . I admire your Schematic skills

Albert

Lets imagine that the amperage going through the transistor is 850A at 2.7v
The transistor uses a small current to move a large one. 100 to 1 I think.

850A/100=8.5A

The formula to get the resistance is R=V/I so:

2.7V/8.5A=0.317647 ohm

So something is wrong here. Is there anybody that can help on this?
I think that that one is a too small resistance for the task.

Jesus

I think it is more like 30 milliamps becomes 3 amps. But before you do that you need to go around the circuit and subtract all the things that take 1 volt like the resistors and diodes.

I do not know if this will help, and
I cannot do it, but I think this is where to look.

jeanna

@Jesus
         I tried your circuit and it Engages however it wont let go once it started . I also did not want to pull anything from the bcap at all until it was ready to do work . 2 volts and over . The reason is it takes a long time to charge with a standard JT . Thus this is why i need Improvements for faster charge time ,a better winding and better transistor . This works as a demonstration as is however I want to push it a bit harder and might decide to use a c or d cell instead and also  a darlington to test this . . And a two inch toroid . Cost for this project  May indeed be the maximum allowed . I think Three hundred ,and now with the only outlet for an ultracap being Maxwell dealers including Mouser Electronics  they alone will be 100+ each .  I have way too many things going on ,Christmas is right around the corner and i need to pay more attention to My daughter's  Love and put up our Tree and Get into the Spirit. Also i have so many orders i will probably shut My site down until after Christmas so i can catch up . Right now i am two weeks behind on two Machine device orders .All others have been Shipped . Pulling from the battery is no concern because it has a recharge source while pulling from the bcap is precious and must be reserved at all cost  to do two functions One to recharge the battery after it gets to 2 volts and the other is power a load be it thermal couple module or Lights and be able to switch off when that work has drained it to under unity of the battery supply . Also anyone with Supercaps as high as 10f to 30 f Might replicate this experiment using a smaller battery than an aa cell . AAA should work with a 10-30f supercap although i don't know . I have some coming to test and see if they come anywhere near the power of an aaa battery . I don't know If a 30farad Supercap will output a continuous source of 2.5 volts at a given amperage or not . From little Cubes that i made i do know they can last over 27 hours powering a Jt and lighting a super bright led so if the little Scap can run that long then it makes since that the led can be replaced to charge a larger supercap to do exactly what  we want the large Ultracap to do ? Ok back to work / l8r . We need a lower powered auto switch that can handle the large current from the Bcap . Its over 3000amps . I hate to wast that thru a resistor trying to dampen it down  ,although this might be filtered thru the thermal heat device to add to the 1 watt needed . Be it heat energy cold energy Light of what ever . It dosnt necessarily have to be all in one place this 1 watt . Many things going on should be added together in the calculation  to complete he final power it produces including simple Heat from components . 

ok

the reason for the b cap starter .. is cuz stage 2 uses some grunt... this is why i tryed to get people to NOT BE CHEEP. as much as you hate to spend money ... you will have JUNK  other WIZE..

lets assume i use 2.6vdc 100 amp as input to stage 2 ... RECONNECT TRANSFORMER .. STYLE 

stupid simple ... but still you want mili amp draw ... I DONT GET IT ... ? ! ? ! ?


w

how many 100 thousand aa can be charged .. from 1 bang .. that big ... ?