Self Running Micro TPU, with closed loop.

[4Tesla]

Hi all,

I'm very interested in this circuit, but I need to get the components to build.  I joined this forum to get involved with this project.

Here is a test circuit that takes out the coil.. this can be used to measure the efficiency of the coil, by measuring the time the LED will flash with and without the coil.

Replace the coils with a 470 ohm resistor.

4Tesla


Edit: I was looking at the circuit.. might have to turn the LED around... This hasn't been tested.  The circuit might need to be modified, but we need a test circuit without the coil for a reference.  If someone gets one working can you please post.  Thanks.. 4Tesla

Edit #2: EM pointed out the circuit won't work.. I believe there needs to be another resister in series with the transistor.

[EMdevices]

4Tesla, welcome to the forum.

I suggest you simulate your circuits before you try and build them.Ã,   You may find your circuit burns transistors.    Might be cheaper for you.  LOL 

EM

[4Tesla]

LOL.. 

I don't have a simulator.  Yea, that would be a direct short.. maybe add a resistor in series.  I know basic electronics, but my knowledge is not as advanced as you and has been quit a few years since I've played with electronics.  Do you have a working circuit without the coil?  What I am trying to get is the efficiency of the coil.  What gauge wire did you use on the coil?

Thanks,
4Tesla

Edit: Any recommendations on an inexpensive simulator. - Thanks, 4Tesla

[BEP]

@Folks

If you connect a simple NPN tranny backwards and leave the base open you have the beginnings of an NRO (Negative Resistance Oscillator).

If I remember correctly a flashing LED is basically that but includes the 'Light Emitting' part.

Now lets say you have a flashing LED and a common transistor oscillator working together and what do you get? In most cases two frequencies. We all know what happens when you have two frequencies along the same path (generally speaking of course!). The result is a third and very likely more frequencies.

Now if you have a two freqency oscillator it is most likely performing as a Van der Pol oscillator.

I can't say EM's circuit is all of the above but a Van der Pol is quite fun and has very interesting results and so do NRO's.

Things that may be worth considering ^

[hartiberlin]

@btentzer:
Please put your LEDs all in parallel instead of in series. This  should increase the running time.
Good luck.