Simple Inverter

[SkyWatcher]

Hi flumen, thanks for the reply and kind words, hope you have success and look forward to anything you wish to share.
Hi aaron5120, thanks for the reply and kind words, was hoping the pics would show the benefit of this setup, glad it is clear to see.
Hi gene gene, thanks for the reply and kind words, look forward to seeing your setup, hope it goes well.
Hi totoalas, don't have any 220vac led bulbs, only have a color changing 110vac led bulb, though do have a bunch of gutted cfls, which is one of the reasons for this line of experimenting and to be able to use burnt out cfls.

Well it has been a very fruitful day, in regard to finding things on the street to salvage for parts, hehe.
A house had 3 CRT televisions for free at the end of driveway, thing is, the man said they all worked fine, so took a 27" and a 13".
So kept the 27" for home, then gutted the older 19" had at home and also gutted the 13" TV, have many nice parts now and a couple of those ferrite yoke shaped cores to try.
Also, a sony dvd handycam was donated to me, so will take a video showing the 40 watt incandescent versus the gutted 13 watt cfl, so maybe the difference can be better seen with this higher quality camera.
Going to see if these ferrite yokes can be cleaned off, seems to be a lot of glue or something on them.
peace love light
tyson

[Flumen]

SkyWatcher, I'm a noobie and don't quite understand how to make the 'bifilar' primary. Is it two wires twisted or wound together somehow? Thank you.

Flumen

[SkyWatcher]

Hi flumen, bifilar is just 2 wires wound side by side in this case, meaning wind 2 wires at the same time, did not twist them with this inverter.
peace love light
tyson

[Flumen]

Thanks for your reply, SkyWatcher.
Are the ends of each wire joined? Like, in parallel?
Thanks for your patience.

Regards
Flumen

[SkyWatcher]

Hi flumen, the super joule ringer variant circuit posted, (a modified joule thief) shows that one end of one wire is connected to the opposite end of the wire next to it, then one of those free ends is connected to the collector of transistor and the other free end is connected to the base of transistor, with the capacitor/diode in between.
More than happy to help and try to answer any questions.
If that explanation is not clear, let me know, can draw something that might make it clearer.
Holy cow, will be getting 2 more large broken televisions to gut for parts, they have nice flybacks to use the ferrite cores and ferrite yokes and all sorts of other parts, such as high voltage transistors, etc.
peace love light
tyson

[SkyWatcher]

Hi folks, here is a video using the new dvd handycam that was donated.
This should give a little better idea of how much light is being output by the gutted 13 watt cfl, by comparing to the 40 watt incandescent.
13watt cfl to 40watt incandescent light comparison - YouTube
peace love light
tyson

[SkyWatcher]

Hi folks, forgot to mention, the first part of the video shows the gutted cfl being lighted, then when it gets dimmer and you hear the wall switch, that is the 40 watt incandescent bulb.
peace love light
tyson

[SkyWatcher]

Hi folks, desoldered a flyback transformer today from one of the TV circuit boards.
Broke one side and reglued it on, will not make that mistake again.
Also showing a couple TV yoke assemblies, ferrite is buried under all that copper.
Though have a feeling this flyback core may work well, we will see.
Probably going to wind similar number of turns and wire sizes as last setup.
Here is a couple pics.


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And this is the flyback transformer, before it was gutted of its core.


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peace love light
tyson

[Flumen]

Skywatcher: "Hi flumen, the super joule ringer variant circuit posted, (a modified joule thief) shows that one end of one wire is connected to the opposite end of the wire next to it, then one of those free ends is connected to the collector of transistor and the other free end is connected to the base of transistor, with the capacitor/diode in between.
More than happy to help and try to answer any questions.
If that explanation is not clear, let me know, can draw something that might make it clearer."


Ahh... I get it!
Many thanks! And I look forward to seeing what you do with those TV parts.


Flumen

[SkyWatcher]

Hi flumen, glad the explanation made sense.
Finished winding the flyback, around 1560 turns of 30awg. magnet wire and 38 bifilar turns of 24awg. magnet wire.
Will be wiring it up tomorrow, we'll see how it goes.


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peace love light
tyson

[Dave45]

Good looking setup, how did you dissolve the glue to get the core out of the flyback transformer.

[SkyWatcher]

Hi dave, thanks for the reply, used exacto knife to cut through reachable glued areas and then used a flat screwdriver in the right places to pry out the ferrite, though since it was first time doing this, broke one end, though it glued back together just fine.
Testing the transformer, may need more bifilar windings or thicker gauge, will find the right combo.
peace love light
tyson

[Gav]

ive just built your circuit and it works great i did not manage full brightness but nearly
1 thing though, the bulb im using created a blue and then purple glow at the base of 1 of the tube and i noticed there is a hot spot in the area, is this normal? could the bulb explode?
also looking forward to seeing your flyback transformer set up, i have 1 sitting here and will replicate if it works well

Gav

[Dave45]

Just a suggestion for your core.

[SkyWatcher]

Hi folks, Hi gav, thanks for the reply, glad it 's working for you.
When the bulb is illuminating brightly and efficiently, meaning high light and low heat in transistor, there is no overly visible arcing in the lower part of tubes and not too hot to touch or hold.
What capacitor are you using across base resistor.
In the process of trying to get the flyback core to perform like the ferrite bead core, not any luck as of yet.
One thing is known for sure, from experiment, that an open core has much greater impulse spike potential than the closed cores or even small gap cores, as is the case with this ferrite flyback.
Will be trying some different variables to see if this can emulate or improve the bead core results.
peace love light
tyson