Self Running Micro TPU, with closed loop.

[Bruce_TPU]

@btentzer


WW Grainger #6A852 is 'J' type thermocouple extension wire. It is composed of a positive leg of iron and a negative leg which is 45% nickel and 55% copper.

Select 'Grainger item number where 'keyword' is shown and put the 6a852 under that and click 'go'.

Interesting use of T-couple wire. Never thought of that! Might be interesting. Other types may be more interesting 

Thanks as always BEP!   

Holiday Cheers,
Bruce

[Thaelin]

Hi Hakware:
   You have based your calculation on LC and you have to add the R. I think if you use a calulator and run your values for all three, you will see a difference.

thaelin

In regards to 7.5Hz resonance, an LC circuit to resonate at that frequency with a toroid core of the sizes were using
would be around 200 winds of wire and about a .4F capacitor. So there must be some other mechanism at work here.
we don't have near enough wire or cap size for it to have the resonant frequencies that it appears to be exhibiting here.

just my .02

@EMdevices

Do you have a part number on that core your using? numbers printed on the outside circumference?

[Bob Boyce]

As Stefan mentioned, please do not overlook the contribution of distributed capacitance of bifilar or trifilar windings in EMdevices original 2X15T series'd winding.

[wattsup]

@Bob

I was just thinking of that when looking at one of my coils. I will put these two in bifilar and wind one over this to try.

[Bruce_TPU]

@ All

Well, tonight I hooked up my barium ferrite coil core and fried nearly all of my LED's and my brand new transistor.

Found one working LED, a blue one, and decided to test a bit slower.  First test with LED and a different transistor was 35 minutes.

Earlier, I had wound a seven turn trigger coil on top of the barium ferrite.  I hooked one lead from the bottom winding, to the anode side of the LED's, in parallel with the power input from the toroid.  To the other bottom lead, I hooked a 1 yard (meter) 20 gauge wire, and left hanging.  I also left the trigger winding leads open (until tomorrow night!   ) 

The LED blinked VERY brightly and went for 37 minutes, 29 seconds before stopping.  (new best time, and this without my good transistor!  )My thinking, is that this is part of SM's secret, an open end on the collector, which was pulsed and then the control wires were the output, and could be fed back to the collector.  I see the bottom coil on the barium ferrite as the collector.  When this was hooked up tonight, I read between 25 and 83 38 mv DC on the top trigger wires.  This was pulsed, as the cap/oscillator discharged into the LED.  Tomorrow night I want to feed back those top trigger wires and see what happens.  Maybe nothing, maybe another few minutes.  The quickest way to stop a charge is to end the wire.  The electrons then radiate perpindicular to the wire, and end up on the control wires.  Perhaps we should indeed be pulsing the collectors of our cores, open ended, and look on the control wires for inductive power.

@ Bob
Thank you for the reminder.  I think a trifilar winding would be interesting.  I hope to try it when I finish my present course of experimentation.

Happy Holiday Cheers,
Bruce