Electron Reversing Device

[poynt99]

tinman,

Again, it's difficult to visualize what you are doing without a schematic of the setup, including the meters.

Is the attached diagram accurate for this latest test?

[tinman]

tinman,

Again, it's difficult to visualize what you are doing without a schematic of the setup, including the meters.

Is the attached diagram accurate for this latest test?

Hi poynt99
No that diagram is incorrect.
I will draw one up as soon as i can,but i have eliminated the DMM's now.
In this video i use only resistors of the same value,and measure the voltage across them with the scope.
The circuit is very simple now.
All current must now pass through the resistor on the input side.
I have two more resistors of the same value across each output to the LED's

There are no cap's in the circuit now,and the BPC is hooked to ground and high side LED.
Let me know what you see in the scope shots in this video.I see a very interesting effect happening here,in that we can carry the negative current over into the next positive pulse-thus increasing the voltage across the resistor.

http://www.youtube.com/watch?v=mmBUQCh9uPE

[poynt99]

OK tinman,

I await your complete schematic with the resistors, at which time I'll try to comment.

[TinselKoala]

Hmm....
OK, I'm not awake yet, but I can see that the oscillator has the same asymmetries that my "deadbug" build of it has, so at least I'm somewhat encouraged that I put it together properly.

However I was not pleased with the frequency range or control, using the only 500K pot I could find in my stash, a PCB trimpot. So I changed this pot for a 50K, 10-turn, Spectrol brand linear precision potentiometer, and I put some more capacitance in the 0.01 uF timing cap to compensate, by putting 22 nF in parallel, for 0.032 uF total. Now I can cover a range of about 400 Hz up to a bit over 8 kHz with much better adjustability. The brightness of the LEDs is better at higher frequencies, but I wanted to still be able to reach the 550-600 Hz range, so I sacrificed the HF end by using the larger timing cap.

Tinman's reported a capacitance measurement on his TB coil of around 50 pf..... but I can't get a good capacitance reading on either one of my flat TB coils with either my ProsKit cheapo LCR meter, or my Fluke 83 DMM. Both of these meters are nice and accurate when measuring marked commercial capacitors. When I break the center tap and measure the two adjacent windings on the 685 uHy coil without them being connected together I get around 2 nF.
(Incidentally this coil will light an LED, _even with the center tap open_ , when it picks up the EM from another TB coil driven at the right freq range.)

I've got some disagreements with some of the comments TM is getting on the video, but that's to be expected.....   

I haven't done any current testing with TM's  new setup yet. I think I know how it's set up from the verbal description but I'm also looking forward to seeing the exact schematic.

[MileHigh]

Tinman:

Without a schematic one simply can't discuss what you are demonstrating in your clips.  Many people try to discuss circuits without schematics and it's simply wrong so we look forward to seeing your schematic.

Some people on your other forum are offering crazy far-fetched explanations of how your circuit runs, there is one person in particular.  I assume that you have the good sense to ignore that.

MileHigh