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: Second Stage Joule Thief Circuits  (Read 476929 times)

jadaro2600

  • Hero Member
  • *****
  • Posts: 1257
Re: Second Stage Joule Thief Circuits
« Reply #345 on: December 02, 2009, 09:32:32 PM »
how many 100 thousand aa can be charged .. from 1 bang .. that big ... ?

How many 100 thousand AA go bang with that one big bang?

Hi Gagdetmall is it better maybe to run the heater circuit with a 12v battery so that the cap will get faster charge than a 1.5v?
Thanks

12V source will damage the Cap unless regulated with a zener or unless there are 6 or more caps in series ...and this divides the capacitance to 1/6th if they're all the same.  I know this wasn't the question..  but the zener WILL shunt current back to ground ( source negative ).

Pirate88179

  • elite_member
  • Hero Member
  • ******
  • Posts: 8366
Re: Second Stage Joule Thief Circuits
« Reply #346 on: December 02, 2009, 09:58:40 PM »
Correct me if I am wrong here but, can't you charge the b-caps with whatever voltage you want as long as you do not exceed the 2.7 volt "full" level?  I have to look back over my experiments with these b-caps to see if I ever did that...I don't remember.  I will check but I am pretty sure I have charged my 2.7 volt 650 F b-cap with a nine volt bat. at least once.  You do NOT want to over fill one of these, that would be dangerous.

Bill

innovation_station

  • Hero Member
  • *****
  • Posts: 5134
Re: Second Stage Joule Thief Circuits
« Reply #347 on: December 02, 2009, 10:15:20 PM »
indeed ... 


now what if the 100 000 aa's were replaced with a device  to produce HEAT ... to keep you warm or light so you could see ..  or flight so you could fly ... my my 
or power SO YOU CAN WATCH TV LOL .....


thank you


w
« Last Edit: December 02, 2009, 10:52:59 PM by innovation_station »

nievesoliveras

  • elite_member
  • Hero Member
  • ******
  • Posts: 1996
Re: Second Stage Joule Thief Circuits
« Reply #348 on: December 02, 2009, 11:52:26 PM »
Thank you @gagetmall and @jadaro!!

We have a simple comparator voltage decision to solve as simple as possible on our hands here.

The need is to have the device to give a shot to fill the 1.5v and then stop and wait for the next shot.

I think that the solution is to build a circuit parallel to the bcap circuit, sharing only the negative.  It will have its own flash cap to give it its one shot and stop.

You know that it can be make to work four different ways of turning on an led with the same 1.5v. I did it once with three.

http://www.overunity.com/index.php?topic=6362.msg148135#msg148135

With that idea in mind, the circuit to be added can be designed.

Jesus

MrMag

  • Hero Member
  • *****
  • Posts: 754
Re: Second Stage Joule Thief Circuits
« Reply #349 on: December 03, 2009, 12:03:10 AM »
Correct me if I am wrong here but, can't you charge the b-caps with whatever voltage you want as long as you do not exceed the 2.7 volt "full" level?  I have to look back over my experiments with these b-caps to see if I ever did that...I don't remember.  I will check but I am pretty sure I have charged my 2.7 volt 650 F b-cap with a nine volt bat. at least once.  You do NOT want to over fill one of these, that would be dangerous.

Bill

I know these are are different beasts then the regular caps but the voltage indicated is usually the working voltage. You do not want to charge them with a voltage that is higher. I would think that charging these with the JT may reduce the life expectancy of the cap. You are sending the cap voltage spikes from the JT that may eventually break down the cap. I keep saying "May" because I am not totally sure. Even though you are charging it with high voltage spikes, the current in these spikes are relatively small so the overall result is ??????

Groundloop

  • TPU-Elite
  • Hero Member
  • *******
  • Posts: 1736
Re: Second Stage Joule Thief Circuits
« Reply #350 on: December 03, 2009, 12:03:44 AM »
@nievesoliveras,

I have been thinking and I think we can solve the circuit by using op-amps
as comparators. A 741 can operate down to approximately 2 volts so this
should be possible. (The component values in this drawing is not the real one yet.)
The left circuit is for discharge to load. The right circuit is for feed back to AA battery.

What do you think?

Alex.
« Last Edit: December 03, 2009, 12:16:45 AM by Pirate88179 »

nievesoliveras

  • elite_member
  • Hero Member
  • ******
  • Posts: 1996
Re: Second Stage Joule Thief Circuits
« Reply #351 on: December 03, 2009, 12:08:21 AM »
This one is with four.

If you take this idea and make two circuits doing two different things with the same voltage. It is possible to solve the problem at hand.

Jesus

nievesoliveras

  • elite_member
  • Hero Member
  • ******
  • Posts: 1996
Re: Second Stage Joule Thief Circuits
« Reply #352 on: December 03, 2009, 12:12:34 AM »
@nievesoliveras,

I have been thinking and I think we can solve the circuit by using op-amps
as comparators. A 741 can operate down to approximately 2 volts so this
should be possible. (The component values in this drawing is not the real one yet.)
The left circuit is for discharge to load. The right circuit is for feed back to AA battery.

What do you think?

Alex.

It seems that we were thinking the same thing with different methods.

Jesus

Edit:::

I think that your idea is good!

Jesus
« Last Edit: December 03, 2009, 12:38:34 AM by nievesoliveras »

gadgetmall

  • elite_member
  • Hero Member
  • ******
  • Posts: 1733
    • Alternative Energy
Re: Second Stage Joule Thief Circuits
« Reply #353 on: December 03, 2009, 01:24:14 AM »
Hi Gagdetmall is it better maybe to run the heater circuit with a 12v battery so that the cap will get faster charge than a 1.5v?
Thanks
/ No . I have abandon the Coil as it is a waste of good energy and tested with a Thermal pelitier Module . It can also Produce "COLD " and well as HEAT Way more Efficiently than Nichrome and last a great deal longer , Many hours until the bcap reaches 1.4 volts where it should begin another cycle . So its the worlds first AA powered Air conditioner also  :) 




@Alex  Looking good  using Ic's I think also .
Albert

innovation_station

  • Hero Member
  • *****
  • Posts: 5134
Re: Second Stage Joule Thief Circuits
« Reply #354 on: December 03, 2009, 01:28:10 AM »
/ No . I have abandon the Coil as it is a waste of good energy and tested with a Thermal pelitier Module . It can also Produce "COLD " and well as HEAT Way more Efficiently than Nichrome and last a great deal longer , Many hours until the bcap reaches 1.4 volts where it should begin another cycle . So its the worlds first AA powered Air conditioner also  :) 




@Alex  Looking good  using Ic's I think also .
Albert

you know gadget if more of the world was like you .....  we as a human race ...  would long ago know the cosmos ... 

you make me smile ... can i say more .... 

looks like your tackion eyes burnt the wall down ...   lol

peace bro!

DreamThinkBuild

  • Hero Member
  • *****
  • Posts: 574
Re: Second Stage Joule Thief Circuits
« Reply #355 on: December 03, 2009, 01:34:45 AM »
@Gadgetmall,

You might want to look at robotic solar engines. They might have the switching effect you are looking for.

From Solarbotics site:
"...The purpose of a solar engine is to act like a power "savings account" -- a small trickle of incoming energy is saved up until a usable amount is stored. This stored energy is then released in a burst, in order to drive some useful (if only sporadic and incremental) work..."

http://www.solarbotics.net/library/circuits/se.html

http://www.elecfree.com/electronic/the-t3se-type-3-solar-engine-by-2n39062n3904/
http://faq.solarbotics.net/oscillate.html
http://www.elecfree.com/electronic/mini-zener-based-solar-engine-by-2n3904/
http://www.jcminventures.com/chlorplast_instructions.htm
http://www.imagesco.com/solar/1381.html

I've been also trying to find ways to switch high current for the 1500's other than buying a $30K transfer switch and robotics is looking good. A small 3v 45ma solar motor can easily make a servo style wire contact on/off or through magnetic switching. Also look for battery monitoring chips for cell phones, they have a very small draw of power.

MCP100-270DI chip VTrip range 2.55V-2.70V
45ua draw, The reset pin is kept low until voltage threshold is reached.
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010684

innovation_station

  • Hero Member
  • *****
  • Posts: 5134
Re: Second Stage Joule Thief Circuits
« Reply #356 on: December 03, 2009, 01:44:06 AM »
IST to the rescue ...

AGIN...

lol

look at my picture ......  do do do la la la

30 bucks ...

ist

it needs a supply  pulse to trigger it ..

gadgetmall

  • elite_member
  • Hero Member
  • ******
  • Posts: 1733
    • Alternative Energy
Re: Second Stage Joule Thief Circuits
« Reply #357 on: December 03, 2009, 01:51:23 AM »
Another thought . ,To regulate the Shot into the battery we could run it threw a 1volt flashlight bulb to absorb some of the current and also produce some  light rather than use resistor but still the problem of turning off that circuit . If we can nail that one part of that circuit then Controlling the out put controller could be devised later . For now the Big problem is keeping the circuit in self run mode after the Bcap reaches Above unity of the Source . .
 
@Dreamthinkbuild
 thank you for the links . we will read on ! Alex if your in here that is kind of what we are looking for . Lets see  if the Volts are in our range .




broli

  • Hero Member
  • *****
  • Posts: 2245
Re: Second Stage Joule Thief Circuits
« Reply #358 on: December 03, 2009, 01:55:58 AM »
Another thought . ,To regulate the Shot into the battery we could run it threw a 1volt flashlight bulb to absorb some of the current and also produce some  light rather than use resistor but still the problem of turning off that circuit . If we can nail that one part of that circuit then Controlling the out put controller could be devised later . For now the Big problem is keeping the circuit in self run mode after the Bcap reaches Above unity of the Source . .

This problem is an engineering problem which can be solved by some electronics, no? I think the big focus now is amplyfing this effect. From hours for charging the bcap to a few seconds. Then these can start heating homes. There's no need to hold back or be shy. IST seems to be heading into this direction too.

DreamThinkBuild

  • Hero Member
  • *****
  • Posts: 574
Re: Second Stage Joule Thief Circuits
« Reply #359 on: December 03, 2009, 02:03:25 AM »
Quote
IST to the rescue ...

Ist that is pretty nice, 3v trigger too. Makes my $1.25 solar motor quiver in fear. ;D