Joule Thief

[innovation_station]

xee2,
I have been wanting to ask you about halogen bulbs.
What is required for a halogen bulb to turn on?
I looked it up and all I found was places to buy one!
I am sure they are made to work at 120vac, but is there not a transformer of some kind?


thank you,

jeanna

stop peeking in on me .... 

i have a unit right here ... 

want a picture of it ....  lol

ist

[Thaelin]

Jenna:
   Hallogen is another type of filament type. You can run them on ac or dc. I have them for headlight in my van. Brighter than normal lights. Draw a lot more amps too. The old fog lamps were halogen too. Now they have GD or gas discharge.

thay

[WilbyInebriated]

@jeanna
you can get 12V halogen lamps in the auto section of most superboxmarts. off the top of my head i think they need about 4-5 amps to 'fully' light. hope that helps.

[jeanna]

Thanks Thaelin and wilby,[

quote author=WilbyInebriated link=topic=6123.msg190053#msg190053 date=1247015982]
@jeanna
you can get 12V halogen lamps in the auto section ..
[/quote]
Right, but will they blow with more?
...or is there a resistor for the 12 volt?
I am thinking of trying one in a jtc of course, but there would be no learning if I just popped the bulb at the first shot, you know like about 24 of the leds in my trash bucket.  ... so I am asking first. I will try, I guess. My son had one he liked for reading which was low wattage, but I suspect the high pitched hum was a ringing coil of some sort...

thank you,

jeanna

I need to go to a birthday party so bye for now. I will check back at 9 or 10 PST...

[the_big_m_in_ok]

xee2 said:

Neon bulbs are DC devices. ... Glow is caused by electrons jumping between states in the neon gas.
Only the negative electrode glows. ...

Okay, now I know.  It was never explained to me.

I have some parts I bought at Radio Shack and found some more.  But, I'm still without a job and the freedom and privacy in an apartment of my own.  But that could always change.

If it does, I was going to take one of the many schematics on this lengthy       thread (800 pgs. and counting!) and try to observe the effects of several---or many---toroids have on EMF in a low voltage circuit (for safety reasons).  I've felt only a moderate line voltage shock in the past and that still didn't feel good!!!!

Low voltage should give a fairly good indication of what's going on in terms of power generated or consumed.  I have a digital VOM to measure with, although I've never experimented with one before.  I only used analog ones in the past.

--Lee