Joule Thief

[Artic_Knight]

Do they not the need a lot of current to work? And what application would you use it for? I know heat sinks for PC but can other things be done with them?

Thanks!

-Altrez

well you could take to seperate closed loop radiators and put a Thermo electric cooler between them, one will make a area cold and the other hot. depending on if you want it cold or hot you may need to reverse the current and your good!

the problem with these devices is they consume many watts, some 10watt small modules some 80 watt larger modules.  they are not as effecient as a compressor and thats why they have not been more widely accepted yet.  if we can reduce the power required then that might give them a broader range of applications,

[altrez]

well you could take to seperate closed loop radiators and put a Thermo electric cooler between them, one will make a area cold and the other hot. depending on if you want it cold or hot you may need to reverse the current and your good!

the problem with these devices is they consume many watts, some 10watt small modules some 80 watt larger modules.  they are not as effecient as a compressor and thats why they have not been more widely accepted yet.  if we can reduce the power required then that might give them a broader range of applications,

I noticed that using the Seebeck effect they generate power! to me that is really cool! I ordering one this weekend.

-Altrez

[altrez]

@all

My friend the EE explained to me and showed me what he ment by empty voltage. To test we took a battery charged to 1.1 volt from my JT charging system. And also took a battery charged to 1.1 from a wall charger.

My battery ran 70 leds for less then 7 minutes and not very Bright. His ran for over 1 hour at what looked like full brightness before we stopped the test. He did say that it would work but it would never have as much charge as one that has been charged from the wall.

I said that may be true but I can keep going from my system and keep charging from the JT without needing to plug back into the wall.

He said that was untrue and that in 1 month no matter how much voltage I have pulsed through it the battery's would all be dead.

He then went off talking about laws of this and that.

I plan to prove him wrong the LLA1 is still humming right along

I will keep updating.

-Altrez

[resonanceman]

[quote author=resonanceman link=topic=6123.msg183980#msg183980

I am thinking that if  a resistor is selected to  just  start to light the LED   .....then   a discharged  battery is  put in its place it should  charge strongly  until the LED comes on steady . 
It seems clear to me that  the  battery is slowly  charging  the  cap   until  the base  reached  its turn on point .......the cap is then discharged  .....and  the cycle starts over .


gary
[/quote]

It turns out that it is not  quite that simple

The  LED does not  exactly  turn off  with high capacitance in the  tank    It just  blinks slower.

I put  a charged battery in
Then I set the pot so that the voltage on the  battery stayed the same for over 10 minutes .

THe  old  battery  was .974 V  when  I started the test .
It is now 1.044 V
So  far no need for readjustment

gary

[resonanceman]

@all

My friend the EE explained to me and showed me what he ment by empty voltage. To test we took a battery charged to 1.1 volt from my JT charging system. And also took a battery charged to 1.1 from a wall charger.

My battery ran 70 leds for less then 7 minutes and not very Bright. His ran for over 1 hour at what looked like full brightness before we stopped the test. He did say that it would work but it would never have as much charge as one that has been charged from the wall.

I said that may be true but I can keep going from my system and keep charging from the JT without needing to plug back into the wall.

He said that was untrue and that in 1 month no matter how much voltage I have pulsed through it the battery's would all be dead.

He then went off talking about laws of this and that.

I plan to prove him wrong the LLA1 is still humming right along

I will keep updating.

-Altrez

Alrtrz

Go for  it   



I hope  you teach him a lesson.


One concern
You said something about changing  your batterys when they reach 1 V
What kind of  batterys are they ?
The batterys I am using  are 1.2 V but  full charge is  1.3 to 1.4
If  you are   only charging  to 1 V   you are underccharging  your batterys  every time .........if the battery has   any memory efffect   ......the memory effect itself will  prove your friend right .

Keep in mind that  you ARE charging with higher than normal voltage .......so  it seems to me that the   battery voltage will lead  the  actual  charge more than with a conventional charger .

SO  ........I sugggest that  you let  your battterys  charge longer .
WHen  reconditoning Lead acid batterys  the  voltage  goes up ...in the case of  a car battery  around 15V then  the vlotage starts dropping as the internal  resistance of the battery   drops . ( this drop  not big ..... only a volt or to ......to maybe 13,5 to 14 V )

I am not sure that  your battery will  react in a similar way .........but if  they did ....... your friend  may not  only be wrong ....he may  have his facts completely  backwards .


```````````````````````````````

charger  voltage  1.055 V   no  need for adjustments

tomorow  I want to try to add  the  Jesus charger part  to it .


gary