Camera Flash

Started by BeeJ in sci.electronics.design5 years ago 6 replies

I have two Nikon camera flash units that are old but working fine. SB-24 SB-20 Need help with 1) flash shoe pinout functions? i.e. how...

I have two Nikon camera flash units that are old but working fine. SB-24 SB-20 Need help with 1) flash shoe pinout functions? i.e. how to trigger manually through the falsh shoe? 2) how to open the units without damage to clean interior dust? 3) compatibility with Canon EOS Rebel series cameras? i.e. will not damage either if attached/used? will flash on camera shutt...


Multiple Masters on SPI

Started by sms in sci.electronics.design4 years ago 11 replies

I'm working on a design where a Cortex M3 writes data to an SPI Flash memory. The issue is that I have a data acquisition device that also...

I'm working on a design where a Cortex M3 writes data to an SPI Flash memory. The issue is that I have a data acquisition device that also needs to read the SPI Flash. Both devices can only be SPI masters. The UART on the Cortex M3 is being used for something else and I2C is too slow. Essentially we're trying to make the SPI Flash into a dual-port SPI Flash with external logic. In sea...


Almost dumped the 4G Junk Flash

Started by Anonymous in sci.electronics.design10 months ago 31 replies

I usually dump these junk mails, but something fell out of it. I almost missed it, but it's a 4G USB flash drive. I guess flash is cheaper than...

I usually dump these junk mails, but something fell out of it. I almost missed it, but it's a 4G USB flash drive. I guess flash is cheaper than paper now. The drive costs me several grands, but better than the paper cert. Looking around to buy a few shares of other BK stocks.


How to reformat usb flash drive?

Started by Bill Bowden in sci.electronics.design7 years ago 15 replies

I have a 1gig flash drive with some software "U3 system" installed. All the files are read only and can't be deleted, and I get an error if I...

I have a 1gig flash drive with some software "U3 system" installed. All the files are read only and can't be deleted, and I get an error if I try to change the attributes to archive. The format option is not available. There are 3 files listed as Autorun.inf, LaunchPad.zip, and LaunchU3.exe with no free space remaining. Anybody know how to dump the files and reformat as a regular flash dis...


320F2811/2812 use part of the program flash as a data flash

Started by mook johnson in sci.electronics.design8 years ago 9 replies

Can the a section of the program flash be written to, by the embedded code, for storing things like calibration data that would are loaded...

Can the a section of the program flash be written to, by the embedded code, for storing things like calibration data that would are loaded serially once the device is in service? I need these to be loaded via the SCI or SPI and written to internal non-volatile memory. These valued may change over the life of the device so the OTP is not a clean option. It can be done of that is the onl...


compact-flash/ide adapter

Started by Hul Tytus in sci.electronics.design5 years ago 6 replies

sci.electronics.design compact-flash/ide adapter A compact-flash/ide adapter (SD-CF-IDE-A) from dealextreme.com worked well but only as a...

sci.electronics.design compact-flash/ide adapter A compact-flash/ide adapter (SD-CF-IDE-A) from dealextreme.com worked well but only as a master, not as a slave, which is a distinct bother. Anyone know of an ide adapter that works either way, either from dealextreme or another dealer? Hul


Xenon flash tube

Started by bitrex in sci.electronics.design2 years ago 42 replies

I got several of these xenon flash tubes down at Rat Shack on sale for less than 2 bucks...

I got several of these xenon flash tubes down at Rat Shack on sale for less than 2 bucks each. http://www.radioshack.com/long-life-xenon-strobe-tube/2721145.html Anyone have a design for a junk box circuit that could be used for experimenting with these, say firing them from a TTL logic output?


"Safe" way of running Flash under Firefox

Started by Don Y in sci.electronics.design3 years ago 16 replies

Hi, I tend NOT to install Flash on outward facing machines just to eliminate one more set of bugs, opportunity for advertisers, cookie jar,...

Hi, I tend NOT to install Flash on outward facing machines just to eliminate one more set of bugs, opportunity for advertisers, cookie jar, etc. SWMBO has been increasingly grumbling about not being able to view the (silly) videos her friends send her way. (sigh) So, I'm looking for options on "safe" ways to provide her with that without adding to the amount of maintenance I have to ...


OT: Optics/Physics question

Started by Tim Wescott in sci.electronics.design4 years ago 16 replies

This picture: https://en.wikipedia.org/wiki/File:Bullet_coming_from_S%26W.jpg Shows a gun being fired, using a high-speed flash. However,...

This picture: https://en.wikipedia.org/wiki/File:Bullet_coming_from_S%26W.jpg Shows a gun being fired, using a high-speed flash. However, it clearly shows detail in the flame that's blowing out sideways from the cylinder-barrel junction. My understanding of that sort of flame is that it is glowing from internal light, which means that the flash cannot stop its action. Indeed, if...


USB Flash drive repair

Started by bitrex in sci.electronics.design2 years ago 19 replies

I have a Sandisk 32G USB flash drive that someone has given me in the hope that I might be able to salvage some data off it. Looks like it...

I have a Sandisk 32G USB flash drive that someone has given me in the hope that I might be able to salvage some data off it. Looks like it was in a laptop and jammed against a wall, resulting in broken solder joints. My PC wasn't detecting it when it was plugged in at all. I cut the drive open and attempted to re-seat the pins and then reflow the solder using a heat gun on a low setti...


SPI flash and arduino

Started by gm in sci.electronics.design2 years ago 15 replies

Hi to all and happy new year! With small delay :-) Project: I will use winbond 64M spi flash memory as external memory for arduino uno....

Hi to all and happy new year! With small delay :-) Project: I will use winbond 64M spi flash memory as external memory for arduino uno. Now, the idea is to use this memory for data logging and also for running sketch etc. Basically i want to free arduino on board memory as much as possible because now am using cca 90% of it. On the other side i want to expand the program with addition...


Reprogramming a uC FLASH while running code - STM32F

Started by John-Smith in sci.electronics.design4 years ago 26 replies

I have used a variety of different micros (Z80 onwards) since about 1980 but all the PROM or FLASH based ones (e.g. H8/300 or Atmel 90S1200)...

I have used a variety of different micros (Z80 onwards) since about 1980 but all the PROM or FLASH based ones (e.g. H8/300 or Atmel 90S1200) were programmed externally, via a spring-contact adaptor. We have one product using an H8/300 with an external 28C256 32kbyte parallel EEPROM for extra code, and we quickly found this could not be written with code running in it! No sh*t Sherlock, as t...


Xenon flash tube SPICE model

Started by Tim Wescott in sci.electronics.design5 years ago 7 replies

Anyone have any pointers to SPICE models for Xenon flash tubes? Or at least data sheets that have the I-V characteristics described or...

Anyone have any pointers to SPICE models for Xenon flash tubes? Or at least data sheets that have the I-V characteristics described or graphed? (This is for a hobby project involving discarded photoflash units, a 19 year old kid, and various web pages on building coil guns, by the way). Thanks in advance. -- My liberal friends think I'm a conservative kook. My conservative friends...


S99-50198 NOR Flash info needed

Started by Sergey Kubushyn in sci.electronics.design4 years ago 6 replies

Does anybody know what chip is it? Spansion S99-50198, FBGA, made for a "big OEM" that told Spansion not to give specs to anybody? I do know...

Does anybody know what chip is it? Spansion S99-50198, FBGA, made for a "big OEM" that told Spansion not to give specs to anybody? I do know it is 128Mbit NOR Flash kinda like their S29GL128P so I can figure out most of its specs with regular CFI query but may be somebody know more so I wouldn't have to waste my time reverse-engineering those? I don't care about their "Top Secret" data or...


Could LED xmas lights be made to look like the old Incan Flasher Bulbs?

Started by Anonymous in sci.electronics.design1 year ago 7 replies

During the holiday, I saw a tree with the old C9 incan flasher bulbs. Those are the bulbs which have an internal bi-metal contactor which causes...

During the holiday, I saw a tree with the old C9 incan flasher bulbs. Those are the bulbs which have an internal bi-metal contactor which causes that bulb to flash on and off. I was thinking that the modern LED light strings can do all sorts of effects, such as chaser motions, color changing, and much more. But I dont see any way to make individual LEDs to randomly flash like these old C7...


Reliability of microcontroller silicon die glue on top of another die

Started by Anonymous in sci.electronics.design6 months ago 43 replies

Hi I have been looking into the GigaDevice GD32 Cortex M3 microcontroller It has a REALLY nice price performance ratio So I dug a little...

Hi I have been looking into the GigaDevice GD32 Cortex M3 microcontroller It has a REALLY nice price performance ratio So I dug a little deeper, and found that they do not integrate the flash and microcontroller on the same die as a normal microcontroller, but instead they use a single die variant of logic and core, and glues a serial flash on top of that Link to picture: h


FLASHING BULB CIRCUIT WANTED.....

Started by Steve in sci.electronics.design8 years ago 37 replies

This is a multi-part message in MIME format. --------------030902040607020204010102 Content-Type: text/plain; charset=us-ascii;...

This is a multi-part message in MIME format. --------------030902040607020204010102 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Hi all, I'm looking for a circuit, either a kit, or built that will flash low wattage 12 volt lamps AT RANDOM. I need to flash about 25 bayonet bulbs, a bunch at a time but completely random. Like if I just used ol...


SSD/Flash card blows up harddisk or part of motherboard ?!

Started by Anonymous in sci.electronics.design2 months ago 2 replies

Hello, One of my harddisks just failed ? I am not sure yet, but it remains undetected, or partially damage to motherboard. I think what...

Hello, One of my harddisks just failed ? I am not sure yet, but it remains undetected, or partially damage to motherboard. I think what happened was as follows: 1. I may have had haste, I pushed a flash/ssd card into the card reader, but it was stuck in diagonal. Because it has long metal plates on the SSD card, these plates may have caused a short circuit ?!?!?!?! 2. Other possibil...


Design your own NAND FLASH Die

Started by mook johnson in sci.electronics.design5 years ago 7 replies

Gents, I wondering if any of you have information on companies that can perform this service. We are looking for a SLC Nand flash that can...

Gents, I wondering if any of you have information on companies that can perform this service. We are looking for a SLC Nand flash that can operate at high temperature reliably (near 200C) Turns out the older SLC NAND chip would do this regularly but as the die shrinks and density increases have occurred, the high temperature performance has fallen off. I'm looking for a company...


Extending the range of my off-camera flash radio trigger

Started by Peabody in sci.electronics.design6 years ago 3 replies

I have a radio trigger for off-camera flash, and would like to extend its range. It's the CowboyStudio NPT-04, which is dirt cheap and works...

I have a radio trigger for off-camera flash, and would like to extend its range. It's the CowboyStudio NPT-04, which is dirt cheap and works very well, but the range is only about 25 feet. I found a blog post showing a mod to a similar 433 MHz device: http://jerryphpics.blogspot.com/2008/07/004-cactus-v2s-modifications.html He added a 1/2 wavelength antenna, but it was wound into a ...