Joule Thief

[resonanceman]

@ist, look forward to any new pictures of your circuits in action!

..hehe, we're on the Pi page now.  Aww... atleast, we were on the Pi page.  Can someone clarify for me the reasoning behind bridging the terminals with a cap in this diagram?

I don't see what the point is.  If there is a newer diagram available, please link me to it.

jadaro

As I understand  it  the  JT  draws power from the battery in  very short  bursts ...... when the  battery is low  that short  time  span  would  limit  the  power  available ..........so  the  cap is trickle charged and the  transistor  gets access  to all  the  current in  a very  short  time .


gary

[innovation_station]

OMG ......  LOL




12 hours now and the darn batteries are STILL NOT DEAD    lol 

what is going on .....  lol  4.2vdc ....  a untuned coil with ou results....  i should be able to do this 20 times b4 that battery is compleatly dead ...

the supply aa 

well

cant waite till i finsh all the mk2 coils...  1 turn 2 turn 3 turn 4 turn and 5 turn ...  all with the same secondary 7x7

ist!

i will add a pic of the unit  still lit up 

oh yea i still have a fully charged jt led recovery battery   lol

[gadgetmall]

@ist, look forward to any new pictures of your circuits in action!

..hehe, we're on the Pi page now.  Aww... atleast, we were on the Pi page.  Can someone clarify for me the reasoning behind bridging the terminals with a cap in this diagram?

I don't see what the point is.  If there is a newer diagram available, please link me to it.

Here you go.. Build away . the best jt on the Planet or Internet for the Home Experimenter)as far as power consumption .and if your Into A fugi Camera Circuit i ran mine and broke my own record of running a clf for 18 hours straight and the 200 leds for another 8 hours . HHHMMM Add a Solar Panel for a day Charge and get a month or two of light not a bad Circuit if i say so myself !you can thank Everyone here for it . !!

[RAF]

sorry but i have always had a hard time with this circuit.

The numbering on the T1 block diagram do not coincide with the numbering in the circuit
diagram.

As far as any fugi camera boards that i have.
I have taken apart a transformer to count the winding but using a ohm meter can confirm this.

I have changed the numbering on the block diagram to match the circuit diagram..

[innovation_station]

progress report lol 

well guys the darn little secondary recovery batteries are STILL GOING  they are getting real dim but they are still putting out light it has been around 16 hours

sheesh ... 

now if i can cut down on my recharge time it should be no problem with a tuned unit ....  that puts out 30 vdc or more lol 

so i finished 2 more mk2 coils all on the same toroire cores   

i have the 2 turn done and the 3 turn and the 4 turn just the 1 turn and the 5 turn left to do 

i will take a group picture for everyone 

we shall call this the MK2 FAMILY  lol

ist