Joule Ringer!

[FRC]

Raff

I think Lidmotor made one with the bigger one. Check out his videos on Youtube. Looks like you got your core winding answer.

FRC

[conradelektro]

Very good video, nice way to transmit information

I have not made any new Joule ringer circuits. This is a basic flyback circuit.

YouTube - EG flyback 12V

@xee2: I like your video very much, this is the way to transmit real technical information if you chose to do it by video on YouTube.

Did you ever measure the approximate power consumption? The 50 Ohm resistor at the base? Shouldn't it be 50K?

Greetings, Conrad

[xee2]

@xee2: I like your video very much, this is the way to transmit real technical information if you chose to do it by video on YouTube.

Did you ever measure the approximate power consumption? The 50 Ohm resistor at the base? Shouldn't it be 50K?

Greetings, Conrad

The resistor I have been using is 50 ohms. I have been using batteries for power which limits current. I just bought a 2A power supply and had to go to a 5W resistor (and it still gets hot). So when using a power supply, a larger resistance values may work better. Attached is chart of current and output voltage for one circuit I tested.

[seth]

The resistor I have been using is 50 ohms. I have been using batteries for power which limits current. I just bought a 2A power supply and had to go to a 5W resistor (and it still gets hot). So when using a power supply, a larger resistance values may work better. Attached is chart of current and output voltage for one circuit I tested.

For all these oscillator type builds i find the performance depends very much on the transistor resistor combination.

I prefer 50 - 100 ohms for IRF 830
1.5K for MJE13009

and for the darlington pair of TIP31Cs i prefer much higher Kohm resistors. I get the best performance in a joule ringer using a neon lamp which is in the megaohm range (i think) with this darligton pair.

I know this info is really scrappy, but i hope it helps a builder out there who is having trouble getting an exciter or joule ringer or flyback oscillator working. I promise that when i move back home to good old england (in less than a month) ill get my experiments more organised and have some results based on a far more scientific approach.

Thanks @ everyone for all the help that gets dished out for free here.

[seth]

double post oops!

[ratul]

D400 transistor for JT/JR

2SC6081, KSD1273 seem to work similar to the fuji camera transistors with slight changes in resistance or capacitance. 2n4401, and even 2n2222 work if you drop the resistance further, but they seem to have a greater power draw and the light cuts out sooner.

I found good result in JT or JR ckt with D400 (2SD400) Transistor. D400 very cheap and used on Radio's AF-AMP Stage.

[skaght]

flyback...

@xee2

Thanks for posting the flyback schematics! These circuits have provided hours of fun experiments (along with the original joule ringer). I find I need to use higher resistance values to minimize current (150-800 ohms, instead of 50). I even made a PNP version that produces a high voltage negative charge instead of positive by swapping all the flyback pins, flipping the diode and using a PNP.

Does anyone know if flybacks have a built in diode? I was also wondering if a flyback can run open circuit for long periods without burning out.

Thanks all, this has really been an awesome thread!

[xee2]

Does anyone know if flybacks have a built in diode? I was also wondering if a flyback can run open circuit for long periods without burning out.

Most new flybacks have diodes built in. Some of the very old ones did not. They were made to work in TV sets and computer monitors which means they should run for hours and hours.

[xee2]

I even made a PNP version that produces a high voltage negative charge instead of positive by swapping all the flyback pins, flipping the diode and using a PNP.

What flyback are you using? The built in diodes prevent the high voltage terminal from being negative, thus the negative voltage would need to be taken off one of the pins. This normally produces arcs between the pins.

[FRC]

Seth

For all these oscillator type builds i find the performance depends very much on the transistor resistor combination.

I prefer 50 - 100 ohms for IRF 830

Were you using the IRF 830 with a flyback transformer ? I just happen to have a bunch of these kicking around.

FRC

[skaght]

@xee2

I'm using the goldmine flyback. If I up the supply voltage too much or drop the resistance too far, it does arc over on the pins, but that could be solved simply by mounting the flyback in mineral oil. Even without the oil, I can get quite a high negative voltage before it starts to arc over. I've been running a xenon flash tube with it currently.

[Muon]

Hurray -- I have the transformer out of a Fuji AA camera now... But I can't figure out the pins that lasersaber and others used to make the Joule Ringer work. It's probably here on this long thread somewhere -- but can someone show me the pin arrangement, which pins to hook up to get the Joule Ringer? Also, a schematic diagram would be helpful..

If you do, promise I will try it!

[Muon]

Ps -- I also finally received a flyback transformer from ElectronicGoldmine.
Can someone show me which pins to use on this to get a Joule Ringer -- also, which is best, the flyback transformer or the Fuji flash circuit xformer??

I'm new at this, but enjoying the effort.

[FRC]

Muon

Ps -- I also finally received a flyback transformer from ElectronicGoldmine.
Can someone show me which pins to use on this to get a Joule Ringer -- also, which is best, the flyback transformer or the Fuji flash circuit xformer??

I'm new at this, but enjoying the effort.

Here is xee2's flyback circuit.

I have not made any new Joule ringer circuits. This is a basic flyback circuit.

YouTube - EG flyback 12V

[Muon]

Thanks, FRC!

Now, I'm wondering if any of you might be familiar with Tektronix scopes enough to tell me if any of the following can do the MATH function multiply, for channel 1 and channel 2 inputs --

Tektronix 2445, or 2215 or 2213

And if so -- does it have a way to then calculate the RMS or the average for the product? (In this case, it will be V*I = Power)

It would be great to see the power waveform and calculate the RMS or the average (for both input and output power).