20mA at 12V one wire circuit

[sucahyo]

This is a slight modification of my hv triggered joule thief:
http://www.energeticforum.com/renewa...ead.php?t=4938

I found out that I can oscillate the NPN by triggering the PNP with HV spike only. Brighter neon can be made by conducting the free leg to ground or large conducting material. Frequency will reduce with grounding, to the point it stop oscillating.

The circuit is made oscillating by reconnecting the negative from source. Once it osccilate the coil will sing. If the driving circuit is touch by hand, it will stop oscillating. A bit similar to Aromaz circuit, 3055 driven by 2n2222, unless this do not has as much power. I smell ozone though.

YouTube - 20 mA one wire neon

[redeagle]

Just built a similar one

I just built a similar circuit to yours. I used a small npn transistor to switch a slightly larger one that can handle the current. my small npn only has one leg of the transformer secondary connected. i am using that transistor to connect the base of the larger transistor to its collector to switch it on. Runs quiet as far as i can tell and I have gotten the input down around 6ma at 10.5 volts. Not sure about the output yet. But it's a neat circuit though.

[sucahyo]

I just built a similar circuit to yours. I used a small npn transistor to switch a slightly larger one that can handle the current. my small npn only has one leg of the transformer secondary connected. i am using that transistor to connect the base of the larger transistor to its collector to switch it on. Runs quiet as far as i can tell and I have gotten the input down around 6ma at 10.5 volts. Not sure about the output yet. But it's a neat circuit though.

. I think this circuit efficiency would be similar to joule thief but will still work with much lower input. If we can add another secondary with much higher voltage multiplication, this has potential of powering flourencent with low input power.

[redeagle]

I have a couple 42kv ign coils. I do have four other wall wart xfmrs in series with the driving trasformer. With their secondaries dumping back to the input battery. I just recently put my bedini coil in series with it to increase the inductance and thus the radiant spike. I haven't put the ign coils in yet but i'll get around to it sooner or later. though i'm sure they don't have a high enough turn ratio or enough inductance to get the bulb lit at this low of current. maybe i can find some smaller flouro tubes to work with.

[sucahyo]

Ok. Someone mention that we only need voltage to light up flourecent, but it seems we need current too. I guess I have believe them too much.

[morpher44]

you need watts

Ok. Someone mention that we only need voltage to light up flourecent, but it seems we need current too. I guess I have believe them too much.

After you strip away all the electronics of an off-the-shelf CFL (thank you Aramoz),
you'll find that you can light them with far less power than
had you powered them off-the-shelf.

Its as if these products are designed to WASTE power -- intentionally.

Also, the notion of a dimmer on a CFL -- to adjust the brightness
and power consumed is absolutely doable.
Dimmers should be provided for CFLs too .. not just incandescent.

Yes ... wattage is the focus.

[redeagle]

After you strip away all the electronics of an off-the-shelf CFL (thank you Aramoz),
you'll find that you can light them with far less power than
had you powered them off-the-shelf.

Its as if these products are designed to WASTE power -- intentionally.

Also, the notion of a dimmer on a CFL -- to adjust the brightness
and power consumed is absolutely doable.
Dimmers should be provided for CFLs too .. not just incandescent.

Yes ... wattage is the focus.

There are dimmable CFLs now. As well as threeways. One thing to keep in mind about the circuit that drives a CFL is that it contains a filimant heater to heat the gasses in the tube so that they conduct current easier and are brighter at a lower voltage. Without the heat you have to have a higher voltage to get the same amount of watts through the tube. That it why they take a while to get to full brightness too. They literally have to warm up

[redeagle]

Weird effect: When I applied resistance between the base of the small transistor and the trigger coil, my input current went up and frequency of oscillation dropped. All of the other oscillators I have worked with the frequency increases with resistance on the base.

[sucahyo]

There are dimmable CFLs now. As well as threeways. One thing to keep in mind about the circuit that drives a CFL is that it contains a filimant heater to heat the gasses in the tube so that they conduct current easier and are brighter at a lower voltage. Without the heat you have to have a higher voltage to get the same amount of watts through the tube. That it why they take a while to get to full brightness too. They literally have to warm up

Thanks for the info. The opposite happen when you use very high voltage multiplication with coil collapse current. Since coil collapse current voltage increase when the resistance is high, utilizing the filament will reduce resistance and in turn reduce voltage and in turn reduce brightness considerably:
YouTube - CFL lighting, with or without filament?

Its as if these products are designed to WASTE power -- intentionally.

Yes, that is sad .

Weird effect: When I applied resistance between the base of the small transistor and the trigger coil, my input current went up and frequency of oscillation dropped. All of the other oscillators I have worked with the frequency increases with resistance on the base.

I found similar effect on the closed loop version. The circuit work without resistance but adding resistance will reduce input current and INCREASE output current up to 10K ohm where the output current wil be reduce along with input current.