Self Running Micro TPU, with closed loop.

[abassign]

@btentzer

"I have added two more 1000 mf caps in parallel with the first one.  So two are electrolytic and one is not.  I do not know if this is "cheating" or not,  Grin  but it increased my run time from 18 minute 2 seconds to my new record for no battery as 38 minutes 5 seconds."

This is a problem... If do you duplicate the capacity and duplicate the runngin time, there is the suspect that energy is drain from the caps...

- You can communicate me what the frequency of pulsation is.
- Do you last every cycle, which is the time in which the LED has turned on?

Can you measure the tension to the heads of the condenser from the 1000 microF?
- How vary the tension to the heads of the cap ?

My questions are evident, if the cycle is brief, but the LED does only a brief flash, here justified the longer time of operation.

[hoptoad]

i think if you look hard enough you will find a unit verry simple and far more powerful already posted
isteam!!

How about posting a link ?!

[Bruce_TPU]

Hello All,

Well, I need to report that I hooked up a second LED in series with the first, and both worked with one capacitor for 17minutes 52 seconds.  This was with my double transistor configuration in parallel.  These are wired the right way.  In reverse, only one works.  one proper and one facing each other, if the one facing is added after LED starts to blink, and then two in parallel wired according to diagram.  Please disregard any other statements.  I went back and rechecked and this is what works.  Three transistors in parallel will not work. 

My next step is to add as many LED's as possible in series and time it.  Then to add a second ferrite, like a tuning fork and see if I can receive any oscillations on it.

Cheers,
Bruce

EDIT:  Third LED in series added.  Total run time for all three was 16 minutes, 40 seconds

[duff]

EDIT:  @ Duff
it says NPN Type switching transistors (pkg of 15)
Silicon:  NPN
typical hfe      200
Vce    30V
Ic       800ma
Power dissipation: 1.8W

ALSO, I now have one transistor facing one way and the other facing the opposite direction in parallel and the LED is blinking away.     I don't know what this means, either, but it is fun.  LOL

Bruce,

If you have two facing each other then only one is doing the work.

As far as the circuit working with one transistor connected backwards I don't see how.
Recheck you inductor connections and be sure it is wired like you think it is.

Maybe the attached schematic will help...



@all

I get the sense some think this circuit is doing more that it really is.

It is a simply an efficient pulser circuit.

The operation depends on two oscillator types in one circuit:  

   1)   RELAXATION type oscillator  (RC time constant determines interval between pulses), and   

   2)   BLOCKING type oscillator, for a one time flux driven triggered pulse (Monostable operation)

Uses for this can be quite varied.  But I'm sure most agree it's a neat simple and efficient way to generate timing pulses for driving other circuits, or just as a fun blinker.  However, since it's so efficient, I believe that it will alow us to find OU operation due to it's sensitivity.

EM

-Duff

[Bruce_TPU]

@ Duff

I pulled out both transistors from the bread board.  I took one transistor, turned it around and replaced it in the same three holes.  I fired up the board and off it pulses.  But now with three LED's, it only worked for about 1.5 minutes.

@ All
I agree with Duff.  No one claims this is OU.  But it is simple to build for us who are not electronic engineers, and honestly, it is fun to experiment with. 

My next goal is to see how many LED's I can hook in series.  Then add the additional ferrite.

Cheers and Happy Thanksgiving to everyone,
Bruce

P>S  Duff,
My L1 and L2 are exactly equal as to number of turns. Also my C2 is 1.5uf