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/diy/ - Do It Yourself


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File: 32 KB, 500x360, _IR_LED_Blocks_Security_Camera.jpg [View same] [iqdb] [saucenao] [google]
500928 No.500928[DELETED]  [Reply] [Original]

howdy /diy/

i'd like to assemble an infrared led kit for the purpose of dazzling cctv cameras and some cellphone camera ccds. i am not a fan of the surveillance grid, and yes i realize this would have the opposite effect against flirs.

i am interested in having the ir leds in a hat/headband/balaclava and perhaps either a backpack or a photographers type vest. the hat would be a full brimmed type, not a baseball cap.

do any of you have experience with this? any convenient links? most of my searches have led to nightvision illuminators or visible led clothing with circuitboards. not what i want.

i'd like to keep it as simple as possible. the battery compartment, on/off switch, wires, resistors, and of course the ir leds. preferably aaa batteries for size reasons but i wouldn't be opposed to something like an 18500.

i've seen a number of different wavelengths for the ir leds, does anyone know the most effective for my purpose? any brands of leds to recommend? i'd prefer zero visible light coming off them, and as little heat as possible while still dazzling the cams.

i think i understand all the basics of doing this, i just have no experience with it. i can do a bit of sewing if needed. i have a local radioshack and home depot, as well as amazon prime. i don't mind paying shipping from another internet retailer if i can get the majority of what i need all at the same time. apologies if this has been covered before.

>> No.500929
File: 70 KB, 232x233, led1208.4.jpg [View same] [iqdb] [saucenao] [google]
500929

i've found loose ir leds and premade arrays like related pic. the array would no doubt work but i think it'd be a lil too noticeable. opinions?

>> No.500937

I'm working a beanie that has a ring of 1W IR LED's embedded in the folded over brim, I'm just hunting for discreet heatsinks. Prototype was good, but pretty fucking obvious with all the sliver metal poking out of the brim.

I imagine modding pic related with IR LEDs would not be hard, and would serve as a good starting point. At least it will obscure your face.

>> No.500938
File: 58 KB, 256x263, Capture.png [View same] [iqdb] [saucenao] [google]
500938

>>500937
hurp

>> No.500944
File: 10 KB, 342x192, 41PTr+0SbJL._SX342_.jpg [View same] [iqdb] [saucenao] [google]
500944

>>500937
>>500938
yeah that's cool, it's just way too noticeable for my taste. wouldn't be bad for the vest of backpack though. i'm also considering adding some visible wavelength leds to make it seem less strange.

the hat i'm thinking of using is a dorfman. got it a size big, should be able to have the leds either under the brim or on top or both without being too noticeable.

1W leds seem overpowered to me... that's gotta be a lot of heat and battery drain.

>> No.500948

>>500944
I have seen those that sling under a brim, that's just the first I saw. But yeah, you could make a pretty low profile ring around the brim of your dorfman,

It is overkill, but I want to be sure, plus I kind of like the idea of the stupid amount of bleed it will cause to nearby photographers (if i am anywhere near in frame they're fucked) and the thought of their confusion over what the fuck caused it. I always have a sidebag on me, a small SLA pack with the appropriate DC-DC converter/PWM driver gives me several hours. Also, its cold here. Delicious toasty invisible head!

>> No.501048

>>500929
cover with dark sheer material

>> No.501095

>>500928
>dazzle CCTV cameras
So, you *want* to attract the attention of every security guard and law enforcement officer who is looking at those camera feeds, and you *enjoy* gettin stopped and hassled constantly by same? You get a thrill from being searched and having your property confiscated, namely your camera-defeating devices?

>2013
>not hiding in plain sight

You're doing it wrong, fool.

>> No.501121

>>501095
0/10

>> No.501122

>>501121
Idiot.

>> No.501124

>>501122
Second. A halfway decent disguise and a few practice sessions makes you a whole new person. Most people are too frightened that they will offend if they ask why your mustache is matted at your lip, or why your mole is a bit pale - so in most cases it does not even need to be professional-quality.

>> No.501271

>>501095
nothing of mine will be confiscated. there are no ordinances or codes against what i'd like to do. at most i'd get hassled by a cctv voyeur and in that case i could easily talk it over with the manager.

if all you have is negative comments and ad hominems take it to another board. this seems like a fun little project to do and would be a good lead in to messing around with modifying some old webcams/digital cameras to ir spectrum.

as i had said in my op this also works on cellphone ccds so it's not just for cctv cams.

>> No.501286

>>501271
>if all you have is negative comments and ad hominems
Listen, faggot: I'm talking COMMON SENSE.
You want to do whatever felonious crap you want to do? Or you're just terminally paranoid? I'm fine with that. Learn to hide in plain sight. Your idea is idiotic and AS I ALREADY SAID it will draw attention to you like flies to shit. You want to be stupid? That's your business, but don't sit there and act like I'm full of crap and don't know what I'm talking about.

>> No.501297

>>501286
No really though. Contribute or fuck off. OP asked how to dazzle CCTV cameras, not for an opinion piece.

i'm >>500937, and i would fucking love security to ask me wtf was going on. i would in return ask why they were so desperate to capture my image. Not all of us are as scared of being questioned by, nor questioning authority as you are.

>> No.501308

>>501286
So you do know what you're talking about? What makes you an authority on the field of deciding appropriate behavior in the view of cameras?

>> No.501310

>>501297
Worst crime you can commit is to embarass or question a cop. Haven't you seen the youtube videos?

Just make it sparkle when they hit you. Wear a conductive shirt so the taser doesn't hurt so they freak out and beat you down. You'll get a lot more media time showing how evil they are if you're actually injured. If you just get tased, it doesn't really work as well.

>> No.501319

Trying to dazzle cameras for whatever reason sounds kinda faggy to me. Captcha stillas Man-worship

>> No.501326

>>501319
>1. to overpower or dim the vision of by intense light

so much negativity in my thread. why? would y'all be just as negative if i had omitted the infrared part and just inquired about wearable leds?

this has use to maintain privacy in public places overrun by cctvs and cellphones. this has use in testing and modding cameras to the ir spectrum. this can even have use as a low budget special effect for homemade movies.

i am not a felon as that one negative nancy implied. i have no nefarious purpose in mind. i think it's a cool idea and i think it would be fun. if you don't have anything useful to contribute >>>/b/

>> No.501327

get mini infrared led , mini low(not human eyesight wavelength) ultraviolet led, open hat, cut cardboard to leave openings for said led s, alternate with various stones, pins, and shit, use ribbon for wiring, lithium button batteries, TWO non-clicking press buttons in series, not right next to each other to turn on and off, put them around hat so it looks like your just adjusting it, TADAAAAA!!! Do same to jackets, make sure to use thin wires and such, no bulging or else they'll think you are a big boom fanatic.

>> No.501525

You may be better using the infrared to conceal features of your face more than trying to "block" the camera.

850 nm IR leds will be the best for CCD cameras. Any decent camera will have a infrared block filtering, though.

>> No.501527

>>501525
> decent
> Implying government contractors use anything other than the cheapest OEM shit they can scrape off their boots for great profit and callbacks in a year when it breaks.

> You may be better using the infrared to conceal features of your face more than trying to "block" the camera.
Thats the idea..

>> No.501534

>>501527

Yeah.. pointing a few high-power pulsing infrared LEDs at the nose/check bone area to obscure your face will probably be more effective than brute force camera blocking.

Search for "850 nm 5W Infrared LED" on eBay brings up some low cost IR modules.

For an IR LED with a 1.2 volt drop operating at 1.5 amps you'll need a series 1.2 ohm resistor (3 or 5 watts). This is just for one LED.

The LED module should be mouned on a little heatsink. Fender washers should do.

Power the LED from a dual AA or AAA battery pack.

Pulsing the LED will save battery power and the effect *may* help jam the AGC on the camera.

>> No.501536

>>501534
Oh wait, you're suggesting shining IR back onto yourself so your entire face is illuminated? You'd need some pretty high output to do anything other than make your face more visible than it was before, but could work. I still say doing the equivalent of shining a floodlight at a camera would be generally better though, in high ambient light the IR may not be bright enough to wash your features out.

To be clear, i'm
>>500937
>>500948
>>501297
I just forgot to name up.

> Pulsing the LED will save battery power and the effect *may* help jam the AGC on the camera.
Interdasting thought.

>> No.501538

Where did the OP pic come from?

Is that a commercial device?

>> No.501549

>>501525
Security cameras generally do not have infrared filters, to give them 'nightvision' capabilities.

>> No.501560

>>501538
>http://www.oberwelt.de/projects/2008/Filo%20art.htm
home made project that i didn't find any follow up to.
>>501534
pulsing is a thought... although i'd need a circuitboard to control that no? tryin to keep it simple. thank you for some more info regarding voltage, amperage, and resistance. at some point i'm going to order a bunch of stuff to test and those specs are something i'll need to learn more about.

also thinking now of using a mix of 850nm and 940nm leds. read the 940s are less effective at ccd saturation but totally invisible to the naked eye.

>ir filters
i've been watchin some videos on youtube to remove the ir filters from cameras to allow them to better see the ir spectrum, and even the ones with the filters can get dazzled by leds.

>>501327
>uv leds
i have a uv led flashlight which is pretty neat, and the thought of a uv led clothing for fluorescent effects is pretty cool but uv tends to be damaging to eyes, skin, and fades clothing.

>> No.501567
File: 28 KB, 620x465, FIRH3LHFHPVYB0J.MEDIUM.jpg [View same] [iqdb] [saucenao] [google]
501567

>>500928

http://www.instructables.com/id/The-Invisible-Face-Mask-/

>> No.501570
File: 24 KB, 100x138, gamepro5.png [View same] [iqdb] [saucenao] [google]
501570

>>501567
much appreciated! i see he doesn't have any resistors in that setup but that's ok, this is precisely the type of thing i was lookin for.

>> No.501612 [DELETED] 

>>501297
Criminal scum/cocksucking faggot detected.
Probably planning on shoplifting, or looting, or just spraying shitty graffitti everywhere, and is too much of a pussy to risk getting caught. I hope you get the shit beat out of you, little prick.

>> No.501614

>>501308
Why not just wear a big flashing neon sign? It'll attract less attention than buggering surveillance cameras will. Do you really think that terrorists, real criminals, people in the intelligence business, etc. do anything other than learn the skill of hiding in plain sight/blending in with the crowd and the surroundings? For fuck's sake how retarded do you have to be to not see this?

>> No.501616

>>501326
>this has use to maintain privacy in public places overrun by cctvs and cellphones
But it DOESN'T because you are drawing attention to yourself! Someone sees a big bright spot on a screen where there is obviously a person, and they're going to want to know WHY. If they're cops or security they are going to assume you are up to something illegal and they are going to physically come to you and confront you. How can you people not understand this!? You may as well go around with a gun shooting at the cameras!

>> No.501625

>>501614
>>501616
see
>>501297

I want these things because I don't want assholes like you pair who seem to have no respect of the idea of personal privacy, taking shots of me via google glass/smart phones/whatever the fuck else you morons think is perfectly ok. Considering the increasing prevalence of facial/number plate recognition software, even more so.

in I do not authorise you to capture my image. End of story. If that's a problem, its yours, not mine.

> i'm >>500937, and i would fucking love security to ask me wtf was going on. I would in return ask why they were so desperate to capture my image. Not all of us are as scared of being questioned by, nor questioning authority as you are.

At least read the thread before you shitpost points that have already been panned.

>> No.501641

Just get yourself one of those insane green laser pointers like those Egyptian protesters were using in Tajir Square. Point the beam directly into the camera lens and hold it there for 15 seconds. It will burn out or severely degrade the CCD semiconductor image device inside. Also you can try a can of automobile undercoat spray put into one of those 20' tall telescopic poles that exterminators use to take out wasp and bee nests in the eaves of houses high up. just reach up and spray the camera face lens or dome with a nice coat of 'fender well no-leak'. I have personally used this method to put Traffic Light Red Light cameras out of action at 2AM in 5 seconds! It works great!

>> No.501654
File: 69 KB, 500x750, leaping - showing off six pack.jpg [View same] [iqdb] [saucenao] [google]
501654

>>501616
>You may as well go around with a gun shooting at the cameras!
Wow, you really made a giant leap in logic with that one.

>> No.501656

>>501625
>number plate recognition
So if I just lit up my number plate, really, really bright, would it wash out the numbers to overhead cameras?

>> No.501669

>>501656
no, mythbusters have tried countless different methods to block cameras from reading your liscense plate and nothing works.

>> No.501675

>>501669
they said one thing they tried did work, but they cut it from the episode for reasons.

>resengs and

>> No.501677

>>501669
HUUR DURR its was on mythbuster so it must be true DERP.
-
Do you honestly think they to do anything without bias?

Seriously.... grow a freakin' brain.

>> No.501678

>>501124
0/10

>> No.501679

>>501271
Bro, stop feeding the trolls.

>> No.501680

>>501297
THIS

>> No.501688

>>501616
>Play dress-up instead
Just out of curiosity, are you clinically retarded?
Op is clearly trying to prevent his face from being recorded with the use of LIGHT.you have no idea if he's planning to wear a disguise in addition to this.
You're adding nothing to the discussion, shitposter.

>> No.501698
File: 4 KB, 276x183, graucho.jpg [View same] [iqdb] [saucenao] [google]
501698

Incognito mode

>> No.501767

>>501297
>i would in return ask why they were so desperate to capture my image.

Repeat after me:

Why are you collecting leverage on me?

Is this intent to commit a crime?

>> No.501768

>>501297
>nor questioning authority as you are.

Damn straight.

>> No.501777

>>501326
>i have no nefarious purpose in mind

Me: I dont want the government collecting leverage on me.
You: WHAT ARE YOU UUUP TO!??

>> No.501783

>>501327
>get mini infrared led , mini low(not human eyesight wavelength) ultraviolet led, open hat, cut cardboard to leave openings for said led s

I like OPs idea.
I like it enough that i might want to make on myself one day soon.

However i want more optional power on the light source.
For ultimate trolling you might want to pretend you have no idea its doing it.

So heres an idea to work with OPs hat. To make sure you use a leather hole punch to get a clean cut through the leather. However i dont know if you can get these scissor models to wrap around the hat. But its still doable, if you have a bench to press on.

>You may be better using the infrared to conceal features of your face more than trying to "block" the camera.

Yes it might be an idea to have the infrared pointed at your face so when it chines off it blocks their view. Experimentation would be interesting.

Can anyone explain why this infrared works?

>> No.501784
File: 12 KB, 400x400, Heavy Duty Leather Punch.jpg [View same] [iqdb] [saucenao] [google]
501784

>>501783
pic

>> No.501801

>>501669
>mythbusters have tried countless different methods

IIIIm not so sure they tried this method.
http://mythbustersresults.com/episode73

Looks like they didnt try this one.

>> No.501859

The device in OP's pic looks like a headband with an infrared LED (780 nm) array and a 12V? battery pack.

Get ahold of one of those cheap white LED flashlights and remove the white LEDs.

Replace the LEDs with infrared ones.

The voltage drop of the IR LEDs will be different (1.1 - 1.2 volts), so you may have to series multiple IR LEDs then connect them in parallel.

Dropping resistors will need to be used to equalize the current between the series LED arrays.

Example: Using a 12 volt battery pack - series 8 IR LEDs then add a 22 ohm resistor in series. That should limit the current to 100 mA, which should a starting point.

Then place those arrays in parallel in increase the output power.

>> No.501860
File: 18 KB, 366x263, ccd-spectrum.jpg [View same] [iqdb] [saucenao] [google]
501860

>>501783
my dorfman isn't leather - 52% Cotton, 48% Polyester. it's also got some vent holes i could make use of, and holes for the chinstrap. i am also leaning towards having the leds mounted under the brim. i don't want to saturate the ccd to the extent half my body is a blob of light, just enough to deter facial recognition.

as for why the infrared works see related pic. most webcams, digital cameras, and non-nightvision camcorders have ir filters however they don't block it completely and for the most part cctv cams don't have the filter.

i've seen enough of the `DERR Y U NO HAID IN PLANE SAIGHT :DDDD` i don't see why my little project would fluster your clammies to such an extent.

i'm going to order some stuff soon and do some tests, which i'll post if useful.

>>501614
>buggering
you britbongs might consent to constant surveillance, but i do not. if enough of you had the bollocks to do this you might regain some of your privacy.

>> No.501864

>>501859
this is more good info for me, thank you.

figuring out how to balance the voltage, resistance, and amperage draw for battery life is one of the main things i need to learn for this project. i don't know how much voltage i'll want, i'm strongly considering the use of an 18500 or 18650 type battery as they have good life and are rechargeable... however they'd be less convenient than droppin in some aa or aaas that i could buy anywhere.

i guess i'll have to order a bunch of stuff and run some quick tests to see how many leds i'll want so i can figure out the battery aspect.

>> No.501868

>>501656
No, you'd need to dazzle the camera in the same way we discuss above, fuckhueg light source aimed right down its barrel, not illuminate your plate even better for the camera (ANPR uses IR as a light source here in ausfailia)

>>501669
Pretty sure that was in the context of speed cameras, which use visible light as their light source (This is the one where they were doing shit like spraying hairspray on to the number plate cover, shit like that yeah?

>> No.501887

>>501641
>Just get yourself one of those insane green laser pointers like those Egyptian protesters were using in Tajir Square. Point the beam directly into the camera lens and hold it there for 15 seconds. It will burn out or severely degrade the CCD semiconductor image device inside.

Any more information on this?

Does it work?

>> No.501895

>>501641
>>501887
i don't want to destroy any property. i don't want nor need to burn out any ccds or the lens.

i have a high powered green laser, but you have to point them directly into the lens in order to dazzle it. you'd need a tripod to hold the laser in place. this is veering way off topic, and is something that would get you in trouble as opposed to a passive infrared facial obfuscation.

>> No.501899

>>501860
A day/night security have a motorized IR filter that can react to light intensity. Usually if a light sensor sees too much light, the filter would be moved in place in a matter of seconds, so rendering this hack useless.

>> No.501906

>>501887
I very much doubt that you can burn out cameras with a typical laser.

>> No.501910

>>501899
interesting... i suppose it would depend on how common that type is as well as the threshold for activating the motorized filter before you claim it's useless. also i highly doubt any cellphone will have this.

thanks all the same though, good to know.

>> No.501943

>>501910
If you google for "day/night security camera" and probably , you can see what they looks like.

I would guess they is you put something out doors that have different lighting conditions, chances they have those. These days, they don't cost a lot more.

Cellphone cameras etc don't have selectable filters. They use CMOS sensors, so you can have some bright spots, but it doesn't affect the rest of the pixels like the old CCD. It might fool the automatic contrast to dim the overall picture.

It is one thing to cause minor/temporary damages to a property, but it is a whole different matter if the camera has a person wearing/holding it. The person might sue you or get you charge with assault charges if you happens to damage the vision etc.

tl;dr Don't do this.

>> No.501944

>>501688
This entire thread is absolute unadulterated shit. OP is a moron. I've been called paranoid, but OP takes the cake. I hope he lives in my area and I'm around when they haul him off for his 24 hours in a holding cell while they run his background for priors and for possible terrorist ties because he was so fucking stupid as to call attention to himself like this.

>> No.501945

>>501777
>Me: I dont want the government collecting leverage on me.
>You: WHAT ARE YOU UUUP TO!??
This. This, times 1,000,000.

>> No.501958

>>501944
feel better now all that sand is out of your vagina?

>> No.501960

op i was interested in this a while back, but after some research, people told me that this used to work 10 years ago, but the cameras they make nowadays aren't affected anymore.
but cap and sunglasses are pretty effective

>> No.501970

Didn't see it mentioned but there's a Kip Kay video on YouTube where he does this same idea with a pair of glasses. I'm on my phone otherwise I'd link you. It seemed pretty effective.

>> No.501990

>>500944
The hat alone will draw enough attention and has way too much recognition value.
Nobody wears hats these days.

>> No.501993

>>500928
In this day and age I'm the last person who would ever say or try to convince anyone that their privacy isn't important and that they shouldn't worry about it being invaded by CCTV cameras, people with cellphones, cameras, and new products like Google Glass, but: I have to agree with some people in this thread who are saying you're going about it the wrong way. Consider this case, especially: You're walking down the street sporting your shiny new IR LED emitter hat/collar/whatever, secure in the knowledge that no camera is going to be able to see your face clearly. However people walking down the street with their cellphones, cameras, or Google Glass, are going to notice you right away. The guy with the Google Glass? You may be blinding him. Someone is going to walk right up to you and ask you, "Hey man, why does your face just show as a big bright spot?" Now you're in the middle of a direct confrontation, they can see your face clearly with their own eyes. You may just turn and walk away from them, but they're going to *remember* you, they're probably going to post something about the encounter on Facebook or some other social media, they're going to mention it to friends in casual conversation. At this point there's literally nothing you can do to minimize how memorable you will be to this person or persons, you've already set yourself apart, you've already made yourself noteworthy in their memory, and they will tell others about it. This isn't even getting into someone who decides to press the matter with you, get in your face, demand to know why you're just a bright spot, "..and what are those, LED's on your hat? Why? What are you up to? Maybe I call the police now, how would you like that?" Is this really what you want? Seriously, what you're trying to do is going to have the opposite effect of what you want it to do. The best thing you can do in this day and age is to be as common and unremarkable as possible, blend in with the crowd.

>> No.502002

>>501993
Who the fuck would call the police over a white spot and LEDs? And how are they going to tell anyone about you? "Some guy walkin' around here, he's a big white spot! Look at this picture of a big white spot!"
"Nice photoshop faggot tone down the lens flare"

>> No.502008
File: 40 KB, 654x349, stop-facial-recognition-software-from-finding-out-who-you-are-camera.w654.jpg [View same] [iqdb] [saucenao] [google]
502008

>>501993
>blend in with the crowd

>> No.502011
File: 61 KB, 650x366, 141816-facial-recognition1.jpg [View same] [iqdb] [saucenao] [google]
502011

>>501993
>blend in with the crowd

what part of i don't care about your opinion unless you adding constru

>> No.502012
File: 33 KB, 511x369, Long_Distance_Face_Recognition_Software_for_CCTV.jpg [View same] [iqdb] [saucenao] [google]
502012

>>502011
ctive ideas or help regarding building?

i'll say it again. idgaf about your opinions. i welcome tips on the building side, the electronics theory, but if all you have are insults and `HURR DON'T DO DIS` then you can cram it with walnuts in some other thread.

>> No.502015

>>501970
>http://www.youtube.com/watch?v=eaIIswjQ8OA
found it, thank you! too bad i already wear glasses... though the prescription is a bit old and i'm due for a new pair...

still saging my own thread. don't want to clutter up page 0 with so many negative nancy's shittin up the place.

>> No.502028

>>500928
i read like 3/4 of the way thru thread till now, but no time so here are my ideas/crontribs
1.) if you have no IRLEDs then u can use normal leds and put a layer or 2 or 3 of developed, but unexposed, film covering the leds and only invisible and ir light will go through it. i used this for my diy nightvision camera out of a cellphone camera or nonnightvision or other cheap cameras without IR filters, though some light/heat is wasted. at least ur head will be warm and wont have to pay extra $ for special LEDs

2.) Remember, CCD/CMOS cameras will have a frame-rate of like 30 to 60 max(usually) frames a sec. which means if you use a joule thief(little advanced, but simple DIY circuit instructions online) to power the led you could power it for days on end with a near dead aa or aaa(thats not even at the LEDS required voltage). the idea is that a transistor switches it on off several hundred to thousands of times a second. highly efficient because its only on half of the time, but it goes on and off faster than any monitor refresh rate or slo-mo camera can pick up. entirely variable depending on the parts u use. with a potentiometer u can dial it to what ever frequency you want. aaaannnnd since its on half of the time u can use a higher voltage on the LED in a cycle that it is rated because it can cool off the half of the time its not on. making the LEDS BRIGHTER blinding and efficient as hell. joule thiefs are the shit. the appropriate name for a Joule thief would be a fly-back oscillator or fly-back oscillating transformer. super easy to build with instruction. Tesla was a fuckin G for figuring out the shit he did.

>> No.502029

>>502028
ha went back and read (god forbid) glad i dint read befo me post i mighta gotten stupider befo i explained my ideas

>> No.502030

>>502029
hahaha hurr durrr cuntribute fail

but yea the reason a dead battery works even if the voltage is too low for an LED is because of a failing magenetic field you turn on and off with a transistor. when the magnetic field fails it induces a highvoltage low current spike which will turn on the LED each cycle. and there are thousands of cycles a sec

>> No.502033

Be sure to document and post here your project works out...

>> No.502077

>>501095
>people sit around all day watching CCTV cameras like in the movies

>> No.502078

>>502028
Joule thief is pretty useless on dead batteries. While it could generate an output, its efficiency sucks in general.

A bipolar transistor saturation voltage has high losses when you are already at low input voltage.

A low battery has high internal resistance. dr;tl you get a very faint light output when battery is near dead. Since a bright light is what you hope for, that's not helping.

I think if you want to make a social statement, a flashing FU in IR might be more effective.

>>502002
Meant to reply to people that suggests a laser. If someone shines you with a laser, it can damage your vision. So yes, a big assault charges. Beside the person has capture the picture with a bright light in it, so the cops will trust the person more than you.

>> No.502252

>>502078
Then dont use a dead battery with a flyback oscillator, i was jus sayin it will last longer. You can set it in the MHZ there will be no detectable flash with any equipment you use natural or artificial, even slo-mo cameras. The peak voltage will be only for a small amount of time. if you want the cycle to be on a higher voltage (to saturate the LED) over more than 20% of the cycle then use a lower voltage diode than the source or higher voltage source, with a zener diode to protect the LED from over-voltage.
Sooooo, A joule thief would be brighter and more efficient then saturating the LEDs 100% of the time. Your welcome

>> No.502258
File: 96 KB, 1024x768, F8LYV5AHEI3WN3T.LARGE.jpg [View same] [iqdb] [saucenao] [google]
502258

>>502252
change your Vin to a lower voltage and you can saturate it for 1% of the time and waste most of ur battery for a high brightness peak flash or raise it to higher and use a zener, and make it so its on 20% of the time still wastes a percentage of energy. but were talking a few batteries who cares they'll last at least 3 days how long is OP gonna be out dazzling the dystopian society he lives in. If it dazzles the cameras better because the LEDS are brighter than who cares.
Do more research before putting down circuits you dont fully understand. plus this is thoeretical. if can have MANY different qualities depending on the transformer and transistor, and their relationship. Idont know everything about this circuit but I know what i just said to be truth, and demonstrable.
the pic isnt from what were talking about but the cycle will look like it but in a pulse form and not as sinusoidal

>> No.502261

>>502077
that's exactly what I was thinking,lol.
That guy probably wears a tinfoil hat under his "wig"

>> No.502405

>>502261
tinfoil is obsolete, better to use a fine mesh of silver on top of a fine mesh of copper.

but hey, 10 years ago when i used to tell people that government agencies were spying on everything they'd retort, much like you, `you're just a tinfoil wearing conspiracy theorist! take your meds!`

it's quite clear now how all pervasive the spy grid is.

>>502077
most places wouldn't have their cctv camera room manned, however these things are often networked and with facial recognition it is possible to track people around. /diy/ isn't about doing things you HAVE to do, it's about doing things you CAN do for fun.

>> No.502408

>>502252
>>502258
would using some sort of pulse system affect the batteries in a negative way? if i use aa/aaa that wouldn't matter, but something meant to last like an 18500 - are those able to handle that without wearing out faster?

>> No.502568

>>502408

A Joule thief is a shitty circuit for pulsing LED if that's what you want to do. Look at what the guys that do solar power beams robots for ideas, but you will have to up the pulsing frequency. Those guys knows that a good capacitor across the power source can help a lot to supply the current during the pulse which the Joule thief fanboys crowd completely missed.

You can't beat the efficiency of directly driving the LED with 3 batteries instead of trying to boost it from 1. There is always an efficiency lost from a circuit.

>> No.502618

>>502405
>10 years ago when i used to tell people that government agencies were spying on everything they'd retort, much like you, `you're just a tinfoil wearing conspiracy theorist! take your meds!`
>it's quite clear now how all pervasive the spy grid is.
All governments monitored their people since the dawn of time, no one is debating this.
There's been hundreds of movies thousands of books written on the subject, some fiction and non-fiction.
The concept is not new and it's far beyond common knowledge.
Unfortunately, suspecting something and having factual proof are two completely different things.
I'm not debating the existence of video cameras, I'm just saying that you're an idiot.

>> No.503470
File: 76 KB, 500x369, 1323946300927.jpg [View same] [iqdb] [saucenao] [google]
503470

>>502011
instantly thought of this pic

>> No.503489
File: 81 KB, 500x369, yep.jpg [View same] [iqdb] [saucenao] [google]
503489

>>503470
And of course the logical conclusion.

>> No.503500

>>503489
shooped

>> No.503564 [DELETED] 
File: 130 KB, 521x225, cvdazzledavidbowie.png [View same] [iqdb] [saucenao] [google]
503564

>>501993

Reminds me George Orwell's commentary in 1984 on everyone being a spy for the government. Your argument sounds like that of a defeatist. Passivity and generally blending in with the crowd legitimizes the police state, anon. We should seek interaction with people; make them question why individuals like OP are doing what he's doing. That's the whole point of counterculture. If you're that worried about the possible consequences of drawing attention to yourself in a manner such as this, maybe you're just better off confiding within yourself as usual.

>> No.503565
File: 130 KB, 521x225, cvdazzledavidbowie.png [View same] [iqdb] [saucenao] [google]
503565

>>501993

Reminds me George Orwell's commentary in 1984 on everyone being a spy for the government. Your argument sounds like that of a defeatist. Passivity and generally blending in with the crowd legitimizes the police state, anon. We should seek interaction with people; make them question why individuals like OP are doing what he's doing. That's the whole point of counterculture. If you're that worried about the possible consequences of drawing attention to yourself in a manner such as this, maybe you're just better off confiding within yourself as usual.

>> No.503654 [DELETED] 

>>503565
HIDE IN PLAIN SIGHT DON'T ATTRACT ATTENTION YOU CAN'T ORGANIZE PEOPLE TO DO ANYTHING IF YOU'RE IN A JAIL CELL, GENIUS! THIS IS REAL LIFE NOT A GODDAMNED MOVIE OR BOOK!

>> No.503657 [DELETED] 

>>502012
I hope you get arrested, body cavity searched, beaten, raped, your assets and posessions confiscated, declared a terrrorist, framed for murder, rape, child molestation, sedition, treason, deported, shunned, and left to die in the wilderness. Cocksuckers like you are what are really wrong with the world: you're violently stupid, you won't listen to anyone about anything, you're a useless pain in the ass, probably can't hold a job because you won't do as your asked by your boss, had nothing but trouble in school, got beat up constantly and claimed it was all their fault (when in fact you provoked people with your shitty attitude) and will always be a drain on society in general. I'd rather go join the fascists and oppress people than have a world full of faggots like you, I'd rather push the goddamned Red Button and blow it all to kingdom come than let it get full of scum like you. Go die of pancreatic cancer alone in pain you piece of shit.

>> No.503663

>>503657
What the fuck did you just fucking say about me, you little bitch? I’ll have you know I graduated top of my class in the Navy Seals, and I’ve been involved in numerous secret raids on Al-Quaeda, and I have over 300 confirmed kills. I am trained in gorilla warfare and I’m the top sniper in the entire US armed forces. You are nothing to me but just another target. I will wipe you the fuck out with precision the likes of which has never been seen before on this Earth, mark my fucking words. You think you can get away with saying that shit to me over the Internet? Think again, fucker. As we speak I am contacting my secret network of spies across the USA and your IP is being traced right now so you better prepare for the storm, maggot. The storm that wipes out the pathetic little thing you call your life. You’re fucking dead, kid. I can be anywhere, anytime, and I can kill you in over seven hundred ways, and that’s just with my bare hands. Not only am I extensively trained in unarmed combat, but I have access to the entire arsenal of the United States Marine Corps and I will use it to its full extent to wipe your miserable ass off the face of the continent, you little shit. If only you could have known what unholy retribution your little “clever” comment was about to bring down upon you, maybe you would have held your fucking tongue. But you couldn’t, you didn’t, and now you’re paying the price, you goddamn idiot. I will shit fury all over you and you will drown in it. You’re fucking dead, kiddo.

>> No.503664

>>503657
See;
>>501958

>> No.503690 [DELETED] 

>>500928
It's too late for you, OP. Just by posting this on 4chan you have drawn enough attention to yourself to be surveilled in everything you do for years to come. Everyone knows that the FBI watches 4chan, and in fact Moot is only allowed to continue operating this site because it's a honeypot trap for the FBI and any other government agency that might be interested in what "anonymous" people posting here might be up to. By declaring to the entire internet your intention to actively try to hide your activities you've announced your intention to commit crimes and will now be scrutinized. I hope you sleep well at night knowing that some nameless, faceless government drones are going through your email, listening to your phone conversations, opening and reading your mail, perusing your bank statements, analyzing your purchases, noting when you start using cash only (sure sign of a terrorist!) and uselessly try to hide your illicit purchases. They'll be bouncing laser beams off your windows so they can hear your private conversations, attaching GPS trackers to your vehicles, watching your movements via tracking of your cellphone, going through your trash, mining every available source of data on you to create a profile of you more accurate than you even know yourself. Your friends will likewise be targeted the same ways (because they might be terrorists or criminals too) and it is YOUR fault that's happening to them. God help them all if they're actually doing anything even remotely illegal, they're going down for it now and it is YOUR fault it's happening to them. Your life as you know it is over. Enjoy being an animal in a zoo, constantly being watched from outside the bars.

>> No.503691

>>503690
Oh, and I forgot to mention: I'm one of the "nameless, faceless government drones" assigned to your case. Many thanks for making my job so easy.