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/diy/ - Do It Yourself

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1269 No.1269 [Reply] [Original]

run all my lighting needs with this

>> No.1417

what's so special about that?

>> No.1452

Maybe blue/white leds normally need around 2 volts to light?

>> No.1983

what is that donut thing and what does it do?

>> No.2027

>>1983
It looks like a transformer, but that makes no sense with a DC circuit like this...

>> No.2041

>>2027
transformer... and transistor

>> No.2042

>>1269
>>1269
Want to clue us in, here? Looks like a 3-terminal voltage regulator, but I have no idea why you're bothering with the EMI filter.

>> No.2045

inb4 /diy/ invents "troll electronics"

>> No.2061

On second thought it looks like it's just an NPN transistor being used as a switch, but still doesn't explain the inductor.

>> No.2081

This circut is called a. Umm fuck I forgot, but it can use every last bit of juice from a battery

>> No.2098

>>2081
Oh! A joule thief! http://www.instructables.com/id/Make-a-Joule-Thief/

>> No.2112

>>2081
it's a joule thief, you jizz biscuit

>> No.2118

>>2061
Also, the gate terminal of the transistor seems to be wired to the side of the battery. I don't think it's being used as a switch, it's just there for kicks.

>> No.2128

>>2098

So this means no one here knows how this thing works even thought it is relatively simple?

>> No.2131

>>1269
if you add three more you can have A BATTERY STICK MAN

>> No.2161

http://www.emanator.demon.co.uk/bigclive/joule.htm
http://www.talkingelectronics.com/projects/LEDTorchCircuits/LEDTorchCircuits-P1.html

>> No.2169

>>1269


thats it i'm going to make one.

>> No.2205

Ah, I see, it's a very simple, basically unregulated boosting switching power supply circuit.

>> No.2212
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2212

>> No.2220
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2220

Is that... a MICRO ARC REACTOR?!?!

>> No.2288
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2288

>>2220
sure it is. Let me just get rid of that old, clunky one you've got lying around there, so i can put this in your suit.

>> No.2519

Troll Electronics

>> No.2833

how can it use all the energy of a battery if it has to have enough voltage to overcome the forward voltage drop?

>> No.3094

why not just tape the neg and pos ends of an led to to the respecting parts of a button cell battery? i've done it before in xmas light projects. no where near as complicated as OPs image and it they power the LEDs nonstop for fucking weeks.
got the idea from an "LED throwie" "graffitti" video on youtube.

>> No.3133

DAT JOULE THIEF

>> No.3363
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3363

>> No.5013

>>3094
joule thief circuit will power the led (white leds won't light with a single 1.5v cell) using a "dead" battery. so all those batteries you've been tossing can still power a led with that circuit. put 2 cells together for even more brightness.

>> No.5038
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5038

>>2045
>troll electronics

excellent. let's do it

>> No.5051

>>5038
No.