Electron Reversing Device

[tinman]

@TM: Your inductance and resistance results seem reasonable, you've got a lot more wire in your bf coil than I do. 
For your timing cap: Caps in series add up like resistors in parallel: 1/C₁ + 1/C₂ + ... + 1/C_n = 1/C_total, so you can build smaller caps by adding larger ones in series. So if you put another 2.2 nF in series with the one you've got you should get another step up in frequency.

I hope you get to feeling better soon, don't stress yourself in the heat.

Hi TK
No-no stress here.
If i get to hot,i just go hop in the pool lol.
But it's only 39c here today-so not to bad.

And in reguards to the cap's-yep,i know about paralle and series-but thanks all the same.
You said you were getting a cleaner wave when you went up in frequency.Mine is getting messy at about 37KHz-and the higher i go the worse it get's.
I start to get a clear ringing threw the wave at about 50KHz onward.
I placed a .22uf cap across the coil and the ringing got larger-but this seems to drop the current draw down on the input side.

If nothing else,im haveing a ball with this simple little circuit,and i now know how to get the inductance of a coil-thanks to you.
The other thing i tried was adding a couple of small incandecant bulbs in series with the led's,and they would light up quite well.

Anyway,i look forward to your findings with the circuit.

Brad

[conradelektro]

@tinman and TinselKoala:

May be I am totally stupid, but I do not get the point? What are you two trying to show? In case you have the time and patience, could you explain in layman terms?

The circuit and your measurements do not make any sense to me. But this is not surprising, because I am not an electronics specialist. I really would like to understand the gist of it and why you get excited about your measurements?

I am not criticizing, I am just curious and confused.

Greetings, Conrad

[poynt99]

Thanks for the coil values tinman.

I'll plug those into the sim when I get home tonight.

btw, how did you measure your coil capacitance of 50pF?

[gotoluc]

Another thing i noticed when i changed the 10nf cap to a 2.2nf cap on the SG,is it now draws 32ma from the battery with nothing conected to the output of the SG ?.
The SG as it is seems to be a fairly inefficient unit.
Maybe a better one could be made.Something that covers from 30KHz to 100KHz.

Hi TinMan,

Thank you for sharing your interesting effect.

Wouldn't a CMOS version of a 555 timer not be more efficient and also capable of higher frequency?

Luc

[e2matrix]

After reading TK's post about not seeing much diference in the light output of the LED's,i decided to place a solar pannel with a 1k resistor across it and test the voltage output from the pannel as we lifted the frequency.

The setup is now running at a top frequency of 74KHz.
The diference between the input and output meters is very large now.
But it seems that that is what the ma draw would be with those LED's running at 4 volt's.

I tried my analog meter ,and that read about 2ma less than the DMM.
Another thing i noticed when i changed the 10nf cap to a 2.2nf cap on the SG,is it now draws 32ma from the battery with nothing conected to the output of the SG ?.
The SG as it is seems to be a fairly inefficient unit.
Maybe a better one could be made.Something that covers from 30KHz to 100KHz.
https://www.youtube.com/watch?v=v7MbkgMehNQ

TK was using Ultraviolet LED's.  I'm not sure you can really track the brightness very well on those.   
I had built a 555 square wave gen a couple weeks ago that was hitting over 500 KHz.  I think they say 1 MHz is max but usually anything over 300 KHz is difficult to achieve.   There are a whole lot of circuits out there for the 555 but got mine from an old radio shack engineers book.