Flash Definition and 146 Threads

These two websites: http://www.increa.com/reverse/dc/ and http://thesignalpath.com/blogs/2011/06/12/camera-flash-circuit-and-nixie-tube-tutorial/ have very similar circuits for a standard camera flash circuit...and overall do a decent job explaining them. There is one question I...

I am working on trying to get a .bin file from a flash memory module. Am29BL802C I have attached a picture of the chip I am working with, the datasheet, and the pinout of said chip here --> http://forums.hackaday.com/viewtopic.ph ... 994#p10994 I need this file in order to reverse engineer...

This experience happened to me, my uncle, and 2 cousins several years ago. None of us have a logical explanation for it. I'm not saying it was anything paranormal, or not; I'm just wondering what all of your thoughts are: Myself, my two cousins, and my uncle were camping in western South...

Hey guys, I would like to create a mixture out of two liquids with an ideal flash point of around 70ºF. The liquids I have to work with are 200 proof (100%) isopropyl alcohol (2-propanol) and aliphatic hydrocarbon mixture (aka hydrotreated petroleum distillates). What I'm looking for is the...

Hi all, I think there is a post on this somewhere that is accessible via google but somehow too hard to find on this site. Anyway, if a nuclear explosion went off in deep space, I think the following would happen: There would be a large burst of energy. All photons from Gamma to Radio...

Hi everyone! First post on this really awesome forum! I'm thinking of an AC-adapter for hot-shoe flashes, which are usually powered with batteries. Here a guy describes his unsuccessful attempt: he built a wooden battery pack with contacts at the right place and connected to a universal...

Not sure if this is old, but it's an interesting little animation! http://scaleofuniverse.com/

when i pressed the power button on my imac g3 desktop computer, there was a bright flash from inside the computer (it has a transparent blue top), and a burning smell such as when a fuse blows i tried using a different power lead a few hours later, the same thing happened again everything...

...set it up in some kind of circuit in which I can press a button/ hit a switch and have the flash go off? I need to create and electric device of some sort, and seeing as I have a bare minimum supplies, I thought this may be plausable. I also need to draw circuit diagram to this. I am...

Hello! I have accomplished creating the USB boot able flash drive, That boots with DOS, I had thought this would be the perfect way to take control over the hard disk when my Operating system is corrupted.. But it's not. On the Dos windows drive c: is shown but I don't think that's my hard disk...

I think someone needs to make a short flash game where you input your favorite fish and are then slapped repeatedly by it. The bigger the better!

Hi, I am trying to build a high-speed flash, based on the PCB from a disposable camera, with the aim of producing a flash with a duration of 5μs - 20μs. The main circuit works, firing four xenon flash tubes from a 330v capacitor (charged to 300v). This is the schematic for the disposable...

A body moves at 0.9999 c, in my FoR i have placed two devices one light second distance apart. As the body passes right next to each device it (body or device) flashes a pulse of light. Would it look like this from my FoR?

Homework Statement how is flash created? The Attempt at a Solution flash makes images caught on a camera brighter and the background dark. why does this happen? what exactly is flash made up of? how do you explain the effects of flash?

I'm a math major with lots of theorems/definitions to know by heart. I regularly use flash cards so I can study while I walk and wait. Basically, I quiz myself on if I can fully remember and perfectly state the definition/theorem. I have used summary sheets in the past, but find that they take...

So suppose in frame K at x_1 a photon is emmited and its absorbed at x_2= x_1+L so, the photon in K has traveled a total distance of L. Now suppose we have frame K' moving at some velocity Beta*c. Why is it that in K' the distance traveled by the photon is different than L if the speed of light...

I was reading "The physics of superheroes", and it mentioned The Flash being able to increase his kinetic energy to tunnel though walls. I tried to find out how fast he would have to go, assuming he is vibrating (as shown in the actual comic) so will have several tries at trying to tunnel though...

We discussed this yesterday in chat. http://news.yahoo.com/london-rioters-battle-police-shooting-protest-054921704.html It seems the riot was fueled by social media, people that had no interest in what happened came in from other areas. Looks like a new trend in mobs and riots caused or...

i was just wondering how light comes to be, from light bulbs or flash lights... is it energy transferred through the particles in the air? I'm still new to physics and am curous about this :-p

I have a unique problem in that I would like to test out an operating system on a PC (M1400 Tablet) that has no Hard disk. Before I had the tablet I had assumed I would be able to boot it up using a thumb drive to test out the Linux support for the stylus. Anyway, the Bios doesn't expressly...

So our continental guests expressed the desire to witness a maritieme sunset. And they certainly did not complain about our efforts to forfill such. This is what you only can hope for The sunset was exceptionally brilliant, you could not look directly in the sun for a long time...

This looks interesting, but I am not sure I understand it. Does it resolve the nonlocality issues of quantum mechanics that arise in the viewpoint of relativity? “Roderich Tumulka (Department of Mathematics, Rutgers): “The GRW Flash Theory and the Conway-Kochen ‘Free Will’ Theorem.” In...

Hey guys, I'm so glad I found this forum as I been going nuts trying to get a good flash video recorder for my web site. I have searched all around the web, but didn't found what I'm looking for ... Does anyone know of any good flash tool that allows users to record short video messages and...

hello everyone, :smile: when i use my usb flash drive in some internet cafe or school lab it become infected. especially lab's computers are full of viruses. is there some software which i can have on my flash so that it protects flash from viruses. do you understand what i try to say? i want...

When I point a camera at the sky and use the flash, it brightens up all the stars I'm looking at (not just the ones on the screen). Does anybody know why this is?

Hello, PF community. Past wednesday I was visiting the National Astronomical Observatory, which is located pretty close to my home, in Chile. It was about 10 pm, and I was waiting for my turn to see through the main telescope, while some astronomers were teaching us about the common stars in...

My wife and I are currently staying in a holiday apartment in France and a couple of days ago we think we started seeing the same white flashes in our baby's room at night. We know there's no possibility of external light sources as our baby's room is completely blacked out at night with...

Ok so last year I went way over my head and tried to build this http://makezine.com/04/strobe/" . Which ended up being a huge failure, now I want to try doing something simpler. I went to CVS and they handed me 12 disposable camera's then which I figured out that if apply 5 volts to a pin and...

Hello, I have a Nokia 6300i cell phone with double flash camera. The camera's flash was just working fine in the begining, then in one day I tried to capture a photo in the night with flash turned to automatic and it did not work. Then, I turned the flash to be on all the time, but useless...

So, if i use this ready boost feature, will i be able to pull my drive otu when I'm done without it have any random crap on it?

Iam trying to revive my old ASUS TUSI-M 1.1Ghz board, its bios needs to be flashed, it can only boot asking for a floppy, I created a bootable floppy in XP on my other machine and copied flash programs in it at ASUS website, i tried booting my floppy startup disk on the other machine and it...

Hi All, What is the working mechanism in photographic machines that allows for obtaining High voltages from two ordinary 1,5 V batteries, using capacitor(s). In principle, charging a capacitor with two 1,5 V will preserve the 3,0 V between the terminals of this (these) capacitors. Thank...

I know there's PortableApps.com and U3. What other ones are there? What's the best?

I created an led flasher using a 555 IC, 2 1k Ohm & 1 100 Ohm resistor, and 1 1000uF and 1 .01 uF capacitor. If you need to know exactly how it's wired up I can make a schematic. My question is how would I increase the flash rate? I need a flash of about 3(up to 5) per second. As you can tell...

Hello, I am familiar with the basic concept of XHTML web design. However, I would like to learn how to incorporate basic videos on my webpages. I've designed a http://pubpages.unh.edu/~jmm42/FINAL/main.html" that is nothing more than simple text and background images. So I was wondering if...

Hi, I going to interface a microcontroller with SD flash memory card for data log. How to caculate the needed memory capacity? Thanks

Good morning. Woke up this morning around 5:45 am. When I got up and walked to the hallway from my bedroom, I noticed a very quick bright white flash above my loveseat in my living room area. Kinda shocked me for a few seconds. I stood still trying to figure it out. The area was too far from my...

Hi, Last night my girlfriend and I were lying in bed talking. We were facing each other and our faces were about 1m apart. The room was dark. Suddenly we both jumped because we experienced a very short lived but bright flash of white light that seemed to emanate from a point about 50cm above...

I have a small problem with Internet Explorer. When I try to run many videos I get the message "You need to obtain Flash or JavaScript is not enabled." I have the latest Flash, so it is assumed that JavaScript is not enabled. I never had any reason to disable JavaScript, so I assume that it...

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i have a a board and i want it divided into 6 parts. 1 part is equal to the size of the stage. when the mouse moves to the left of the screen i want the current part to tween into the left part. same for right and down and up. what i have so far is for the bar on the left, right, bottom...

macromedia flash Professional 8 loaders and scroll panes help -------------------------------------------------------------------------------- i put this in programming but no one replied and i don't know how to move threads so I am just reposting it here. im using macromedia flash...

Why does my flash drive not have enough space when it DOES!? I am trying to copy a folder that contains an .iso to install a program. When I right-click the program folder, the properties tab says that size=4.0 GB. When I right-click my flash drive, the properties tab says free space=7.97...

Although photomultpliers are the most sensitive light detectors, are there any other radiation counters that utilize photo-transistors, or other means, to detect photons emitted form a scintillation crystal when hit by incoming radiation?

Hi i have any idea in physics 'i'm a game programmer who needs help i have this flash file http://www.knowingames.com/test_ik_06.swf" the original idea is that i can click any opint on any shape and it'd move as in the flash exmple i have no idea what is the name of this physics action...

Some teens asked me a "what if" question here it is Lets say a person is travel at the speed of light of holding a flashlight behind him could he see the light coming from the flashlight? My logical answer was no because the person would be in front of light Where as my friend who...

I am involved in a legal case and I need to know some things about flash drives. 1. Does anyone know if it is possible to find out for sure exactly when a file was saved onto a flash drive? I know that you can acess the "Date Created" and "Date Modified" information through by right...

It is a Veritech 2GB flash memory.. I tried it on some computers.. they recognize it, but when I double click it to open it, it doesn't open and a message box says that it's not formatted, do you want to format it?... I tried to scan it by antivirus but nothing appeared... I tried to format it...

Last night we had the most bright and beautiful sunset I ever saw look at the color of the clouds The start of a green flash? And later in the evening:

I have an external Western Digital 320gb hard drive that has never given me problems. However the only thing i can think of that has caused sudden problems for this external SATA drive is the bios flash that i recently updated. The drive is recognized in mycomputer, however it doesn't say how...