Self Running Micro TPU, with closed loop.

[plengo]

@Groundloop
cool man. Very nice. Yea, it will be helpfull if you watch my video http://www.youtube.com/watch?v=LXtafVgJW_M. There I show that it is a little tricky to make it run "right" where there is a balance where it will run and not run down. The interesting thing is once you get it right you can disconnect the battery and connect it again and it will "remember" that last setting. I know, it is craizy but again, thats monkey science, I am only stating the facts.

Another thing that happend to me was, as I am trying to create new designs I notice too that using the same specs I got totatly different results concerning that "sweet spot" where it runs good. I tried about 5 mosfets already only one worked. (I am not trying to trick anyone here, sorry for the difficulty).

Fausto.

[Groundloop]

[EDIT] Deleted.

[gyulasun]

Hi Ground,

I cannot see a 10-12cm long piece of wire connected to the gate of your MOSFET (maybe you have it under the circuit board?)   what can be seen in Fausto's video he refers to touching it to start (this is connected to the gate electrode of the MOSFET if I am right?). 

I think it is somehow an important part and may function as an antenna to the otherwise open circuit  of the gate and may modulate the gate / or keeps the MOSFET in a just switched on state by feeding its gate by some input voltage picked from the stray field coming from the big  bifilar air core coil.  And when you first touch the gate, you charge up its gate-source capacitance to open the drain - source channel.

So I think it would be worth experimenting with the length and the position of this wire with respect to the bifilar coil.

Gyula

[Bruce_TPU]

@ Plengo
I was figuring total wattage, not amp hours.  I think that wattage is more accurate.  we know the total wattage of said battery is 1.26 watts.  150 ma X 8.4 volts

You are using .02 ma at a total of 4.12 volts.  .002 X 4.12 = .01 watts per hour

1.26 watts/.01 wph = 126 hours run time

Someone please correct this figure if it is not correct.  Thank you.

@ All

I have unplugged my battery from the oscillator (until tonight!).  It had gone up to 7.18 volts

I took my drained battery that had shown a recovered voltage of 7.11 volts.  I hooked it to my mini motor and it did not run it, at all, not for a second.  As I suspected, no amperage, or not enough to move the motor. 

Now I have plugged that same battery into the oscillator.  When it reaches 7.11 volts again, after having been on the oscillator, I will try again the mini motor.  If it moves, I will be convinced that it is receiving a charge from the circuit and that it is not battery recovery.  We will see...   

[plengo]

[edit: my computer crashed as I was typing]

@Groundloop
I am impressed that my monkey science can intruigue and Engineer. Iam an engineer myself just of a different kind (computer software). I glad you have some toys to play. 

I have an excellent news. I have finally reproduced my best baby and it is the same circuit but it is running 20+LEDs and voltage is going up. Oh boy, thanks to you Groundloop I forgot that I must use the D2s correctly because they drop the voltage just right so that the battery will not drain to death but just enought to light the LEDs and the oscilation (I think) does the trick of "tricking" the battery. Later tonight I will spec the differences.

@gyulasun
the gate of the mosfet on my original circuit is not connected to anything (see the pic). But in the new one I do connect to the base of the PNP transistor. Again, science monkey here trying until I find the "sweet spot".


Fausto.