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 1 or 2 watt CFL Driver from Garbage
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kcarring
Moderator


Canada
1057 Posts

Posted - March 19 2012 :  03:42:36  Show Profile Send kcarring a Private Message  Reply with Quote
A while back I played with a circuit by Tony Van Roon off the sentex.net site, and I made some mods to it, tonight, and I was surprised, I took a pretty good shock off it and though hmm, that's some pretty good high voltage spike, now, so I hooked up a gutted CFL.. works not bad at all, most notable points are it can be made from garbage, no special CT transformer needed, with the only hard to find component being a 555 timer chip. It can be driven at the 1 or 2 watt level and is dead quiet, no heat - if not incredibly efficient, it's still another way to "use that spike" and has low draw, AC capabilty for wiring. I'm sure someone has done it, so I won't call it mine, but I did stumble into it, having played around with many variants, flipping current potentials, looking for inversion to AC from easily found "wall wart transformers", as they are so easily come by for free, and RV/Camp CFL lights are bit pricey.

Check it out, see what you think.

This is the 1 watt illumination, I'll post another vid of it running at 2 watts. To make it 2 watts you simply add another 103 cap on the Pin 2 to ground, in series, effectively halving the capacitance. Draw jumps up to 130 mA, with my transformer, which is a very typical 6V 300 mA wall wart, run backwards for step up.



~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!

Edited by - 49er on March 19 2012 09:41:20

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49er
Administrator



USA
4426 Posts

Posted - March 19 2012 :  08:52:40  Show Profile Send 49er a Private Message  Reply with Quote
Hi kc

Can't see the Ytube box to touch on it.

Doug
The sky is not the limit...There are footprints on the MOON.
Your only as DUMB as where your standing.
No matter where you go there you are.
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Magneticitist
Senior Member



USA
681 Posts

Posted - March 19 2012 :  09:34:41  Show Profile  Visit Magneticitist's Homepage Send Magneticitist a Private Message  Reply with Quote
^ edited to fix link =)

[on the gravy train with biscuit wheels]
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49er
Administrator



USA
4426 Posts

Posted - March 19 2012 :  09:42:14  Show Profile Send 49er a Private Message  Reply with Quote
Hi Mag

Thanks I didn't know that

Doug
The sky is not the limit...There are footprints on the MOON.
Your only as DUMB as where your standing.
No matter where you go there you are.
You must be logged in to see this link.
SKYPE bxx49er
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TinMan
Advanced Member



4082 Posts

Posted - March 19 2012 :  17:52:09  Show Profile Send TinMan a Private Message  Reply with Quote
Hi kcarring
Nice simple setup there-kinda like a small invertor
What frequency are you running at? and do you have a scematic for it ?


swim at 90 degrees to the current and gain speed in two directions

skype-thetinman.69
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kcarring
Moderator



Canada
1057 Posts

Posted - March 20 2012 :  01:00:07  Show Profile Send kcarring a Private Message  Reply with Quote
@TM Heya! Still wondering what parts you'd like, shall I box up that distrobution block in a small package and get a shipping quote? Maybe send me your postal address, if you like. I rather doubt the motors are worth the shipping costs, as they are heavy...

The circuit is a small inverter, a strange one, but can be made from junk, which is why I like it. It's nice way to have a small outdoor like run 40 or 50 feet from the battery. Maybe even 100, I don't know. I fried a lot NPN's trying to make it go on those... gave up, FETs work better. At the 4 watt level, though I started frying stuff again, FETs. Seems best suited for 80-230 mA loads.



~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!
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kcarring
Moderator



Canada
1057 Posts

Posted - March 20 2012 :  01:07:15  Show Profile Send kcarring a Private Message  Reply with Quote
Xee2vids pointed something out to me:

quote:
If I understand what you are doing, when the capacitor is discharged the mosfet is shorting the power supply to ground and this energy is not doing anything (just wasted). With this circuit the energy goes through transformer and builds up magnetic field. I think this will give more brightness for the same current. However, I do think your circuit will give AC whereas this one does not (but it sort of does).


His adaptation (with 555 oscillator assumed to be set up the same as mine, and thus not show):



I tried this but couldn't get it to run?

This is the best setup I have, so far, overall:

Driving a (normally) 23 watt CFL
IRF610
.02 uF capacitance on the drain to positive connection (2 103's parallel)
.05 uF capacitance on pin 2 to ground (2 103's series)
.01 uF on secondary leg
Same 1k & 2k resistors
100 uF electrolytic on the rails
12.75V @ 140 mA (~1.8 watts)
about 480Hz operation



(Still Uploading)

~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!

Edited by - kcarring on March 20 2012 02:45:06
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