Dr Ronald Stiffler SEC technology

[Lidmotor]

Slider---  I was thinking of using a transistor to isolate the function generator.  I will probably try a fast diode and a cap on the way to the transistor base.  I plan on just lighting up a few leds so maybe that is not even needed.  I would hate to zap the thing in the first 5 minutes.

Good news today!  I built up that simple one transistor crystal circuit you showed a ways back and got it to work using a 7MHz  2 pin crystal.  I had to fiddle around with cap values and several different  L3 coils but finally got it light leds down one wire.  Pretty cool.  Ran it off a 9v battery.  I will play around with the neat little circuit more tomorrow. I wish more people would try it.

---Lidmotor

[SkyWatcher123]

Hi all, I'm trying some different leds with the same exciter setup.
I picked up a 4 pack of Utilitech 14 watt 1600 lumens, led tube lamps or linear lamps, the ones meant to replace those flourescent electronic ballast lights.
On clearance for 5 bucks, and they are encased in glass.
So, after hooking one up, realized it must have circuitry inside.
I then proceeded to break the entire glass envelope and slice all the glass off, that was attached with some silicone to a strip of aluminum backplate.
It's just one long led strip of 52 leds, though i cut one off and another shorter strip of 24 leds, cut another one off also.
I separated the two strips and they both light up very well with this exciter.
The 24 led strip is blinding at 520 milliwatts.
I had to scrape a couple spots to solder wire connections.
I will test the 52 led strip tomorrow.
The nice thing is, i essentially have 4 strips of 24 leds in series and 4 strips of 52 leds in series for only 5 dollars, with only a little work to get those strips, cutting off the circuitry and also being careful, use gloves.
peace love light

Edit: another interesting thing, when you touch the aluminum back plate strip, i can see the leds light up slightly, with the circuit not oscillating.

[mikrovolt]

Lidmotor happy for you, arbitrary, sweep, frequency counter, precision signal.

Slider good one, There are a lot of diodes on the SEC 18 the remote idea with opto coupling is interesting.
The circuit for fiber optic transmits and receives of sine in the radio frequency over a few meters or less of fiber cable turns into pulse... the turn-on voltage of the led is received at the photo transistor at the led turn on voltage.
It is an interesting shape because it has rounded edges and a narrow triangle offset above base line gives a narrow pulse. A sine into AV plug, the half wave into photo transistor should be slightly more narrow, arbitrary function could simulate that. The signal generator can be placed behind while the photo transistor and final amplifier stage could be on the bench keeping a distance for delicate circuitry might be helpful.
There should be some results coming up on the 13W led light. (not my video)
https://youtu.be/me3kPvrOLi0

[NickZ]

Slider---  I was thinking of using a transistor to isolate the function generator.  I will probably try a fast diode and a cap on the way to the transistor base.  I plan on just lighting up a few leds so maybe that is not even needed.  I would hate to zap the thing in the first 5 minutes.

Good news today!  I built up that simple one transistor crystal circuit you showed a ways back and got it to work using a 7MHz  2 pin crystal.  I had to fiddle around with cap values and several different  L3 coils but finally got it light leds down one wire.  Pretty cool.  Ran it off a 9v battery.  I will play around with the neat little circuit more tomorrow. I wish more people would try it.

---Lidmotor
  end quote.


   Lidmotor:   I am also looking into building a crystal oscillator circuit. I've pulled out several crystals from my junk pile.
So, I have the following crystal ready to test, the 3.5k, 4K, 7,2K, 8k, and the closest to the 13.45K that the Doc tunes to, is a 12k crystal. I also have a 20k, if needed, and I can further tune the crystal oscillator by the ferrite rod inside the Tesla secondary coil. 
   However, as Gyula mentioned, the main L3 type coil needs to be at the same frequency as the running oscillator frequency for the best effects. This I will try to do afterwards.
  I have also managed to make the 120v reflector led bulb that I had previously shown a picture of, to light by capacitance. By placing the two diodes on it, and placing the whole bulb on an aluminum base, so that it lights up now. May not work as well as the right led bulb with the aluminum back plate, but it lights up pretty well, in any case.  So, I'm looking into just what crystal oscillator circuit to use, one the can output enough power to properly light the bulb(s).
  Any ideas are welcome...
   BTW: I have never had any problems with my 2MHz SG being affected by HV, it's old, but still works fine. It's just too low powered for this project, as the output has to be able to light neon bulbs when connected to an oscillator, not just leds.

[NickZ]

   Here's some pics of the bulbs that I'm using. I got the round led 120v reflector spot light bulb to light off of capacitance. It's ready for the crystal oscillator circuit.

   The filament bulb lights the brightest, (bang to the buck), but I can only make it light with a single wire connection to it, to one side of the filaments. It's a 40w equilavent, and it lights quite bright.