Extending the range of my off-camera flash radio trigger

Started by Peabody in sci.electronics.design10 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 ...


Flash Kyle Rittenhouse found dead!

Started by Anonymous in sci.electronics.design6 days ago 1 reply

He knew too much. Is it April 1st yet...

He knew too much. Is it April 1st yet...


Handing Out USB Flash Drives Like Business Cards

Started by Anonymous in sci.electronics.design8 years ago 27 replies

https://www.customusb.com/

https://www.customusb.com/


Debugger recommendation wanted

Started by garyr in sci.electronics.design8 years ago 22 replies

I'm designing a board with a Cortex M3 on it. I need something to program the flash and enable debugging. I'm considering the J-Link EDU. What...

I'm designing a board with a Cortex M3 on it. I need something to program the flash and enable debugging. I'm considering the J-Link EDU. What would you recommend? Thanks in advance for your comments.


Flash and Dazzle LED Technology Set to Music

Started by Anonymous in sci.electronics.design4 years ago 8 replies

I doubt these are neon- have to be LEDs https://www.youtube.com/watch?v=3oUMkoKEcyc

I doubt these are neon- have to be LEDs https://www.youtube.com/watch?v=3oUMkoKEcyc


OT: 32G SD scam

Started by Anonymous in sci.electronics.design8 years ago 6 replies

I got it two months ago. My friend got it a month ago. These e-bay 32G SD cards are actually reprogrammed chip with holely flash beyond 8G. ...

I got it two months ago. My friend got it a month ago. These e-bay 32G SD cards are actually reprogrammed chip with holely flash beyond 8G. Anybody else got it?


Tubes are back, the penthode flashdrive

Started by Jan Panteltje in sci.electronics.design8 years ago 24 replies

Penthode flashdrive: http://www.etsy.com/de/listing/156353007/32gb-pentode-usb-flash-drive ;-)

Penthode flashdrive: http://www.etsy.com/de/listing/156353007/32gb-pentode-usb-flash-drive ;-)


SEC Consult SA-20181130-0 :: Multiple Vulnerabilities in Siglent Technologies SDS 1202X-E Digital Oscilloscope

Started by Jim Whitby in sci.electronics.design3 years ago 7 replies

Just got a news flash on this: https://seclists.org/fulldisclosure/2018/Nov/68 Apperantly it uses Telnet for the network connections, Easy...

Just got a news flash on this: https://seclists.org/fulldisclosure/2018/Nov/68 Apperantly it uses Telnet for the network connections, Easy root access to anyone.


Raspberry Pi 2, Camera Shy

Started by amdx in sci.electronics.design7 years ago 9 replies

It seems some camera flashes can cause Raspberry Pi 2 to crash. Just an interesting effect. ...

It seems some camera flashes can cause Raspberry Pi 2 to crash. Just an interesting effect. http://www.raspberrypi.org/xenon-death-flash-a-free-physics-lesson/ Mikek


WTF Xilinx...

Started by Fred Bartoli in sci.electronics.design9 years ago 3 replies

For a customer I have to install some xilinx SW to flash an FPGA design of theirs. D/L their last release of labtools... 1.1Go, no...

For a customer I have to install some xilinx SW to flash an FPGA design of theirs. D/L their last release of labtools... 1.1Go, no less. Well, I expect be able to select the programming tool I want, so lets go for the install. Crap, it barfs 4Go on my HD. Morons... -- Thanks, Fred.


dumb cell phone question

Started by John Larkin in sci.electronics.design6 years ago 42 replies

I have a Casio Rock flip phone that I really like, mainly because it's indestructable. I think they demoed it by running over it with a...

I have a Casio Rock flip phone that I really like, mainly because it's indestructable. I think they demoed it by running over it with a jeep. But the charging connector is flakey. If I buy another one on ebay or something, can I pull the microSD flash chip from the old one and poke it into the newer one, and have everything work like before, same phone number and provider and all that? Is...


Intel microcode

Started by Tom Del Rosso in sci.electronics.design4 years ago 9 replies

The Spectre and Meltdown exploits bring up a few things that are extremely surprising to me. Flabbergastingly* surprising. What about...

The Spectre and Meltdown exploits bring up a few things that are extremely surprising to me. Flabbergastingly* surprising. What about you? That their microcode is in flash and not ROM. That you can change it with software instead of requiring connection to a programming device. That their microcode, which should be very hardware specific, has so much code in common that every CP...


OT?

Started by gray_wolf in sci.electronics.design2 years ago 41 replies

I need to send 40GB of photos to several people. My upload speed is .230 MB/s. It seems to me my best bet is to mail them a flash drive. Any tips...

I need to send 40GB of photos to several people. My upload speed is .230 MB/s. It seems to me my best bet is to mail them a flash drive. Any tips on mailing them 1st class mail? Any problems mailing them to Mexico and Canada? I live in Texas. Nothing illegal just common family type images. Thanks


Pulling firmware from consumer devices

Started by bitrex in sci.electronics.design10 years ago 23 replies

I have a little media player box that I'd like to be able to pull the firmware from and run through a disassembler. I'm fairly certain that...

I have a little media player box that I'd like to be able to pull the firmware from and run through a disassembler. I'm fairly certain that one of the chips on the board is an SPI flash memory; the trouble is that I can't pull up anything resembling a datasheet on the Web based on its markings. So to do what I'd like to do, assuming I'm not able to identify the chip, I have to a) con...


Building an LED microflash

Started by Zephod Beeblebrox in sci.electronics.design8 years ago 15 replies

I am having a little fun thinking around corners. I have a huge array of LEDs and I want to pulse them on and off quickly (on= ce). A trip...

I am having a little fun thinking around corners. I have a huge array of LEDs and I want to pulse them on and off quickly (on= ce). A trip switch will trigger the LED flash briefly.=20 I need help with the circuit design. I'll try to show what I need done... The LEDs are all in parallel and are 3v. The input voltage will be from a 3= v DC supply (a coin cell). A capacitor will c...


Proposed way to topple North Korean leadership

Started by amdx in sci.electronics.design4 years ago 31 replies

I added this to another thread but no one picked up on it. I basically comes down to bringing information to the N. Korean people about the...

I added this to another thread but no one picked up on it. I basically comes down to bringing information to the N. Korean people about the rest of the world in a non threatening way. It can't be just straight western propaganda, but entertainment stories with a background that is normal life in most democracies. I don't know why we can't flood the country with flash drives, Micro SD c...


Identification of modules

Started by Piotr Wyderski in sci.electronics.design5 years ago 21 replies

My system will be composed of a number of free slots which can be populated with some modules (mostly containing power electronics). The...

My system will be composed of a number of free slots which can be populated with some modules (mostly containing power electronics). The simplest the module is, the better, don't want to use a micro to do the job because of its limited FLASH/EEPROM retention time. The module must be able to report its identity to the main controller (one from the closed universe of, say, 32 possibilities ...


Freelance sites (lol!)

Started by bitrex in sci.electronics.design3 years ago 27 replies

A solicitation for the design a pulse-detector which has to measure the precise duration of high intensity visible light flashes on the order of...

A solicitation for the design a pulse-detector which has to measure the precise duration of high intensity visible light flashes on the order of 10 nanoseconds, plus digitally record flash intensity during the pulse - "using Arduino." and constructible using only off-the-shelf components commonly available for purchase in Pakistan. Budget: $50


non-pipelined fast ADC

Started by John Larkin in sci.electronics.design1 year ago 79 replies

Does anybody know of one? I'd like to digitize 6 bits or so, really fast. Most fast ADCs take 3 or 4 clocks to process the data. Even 4 bits...

Does anybody know of one? I'd like to digitize 6 bits or so, really fast. Most fast ADCs take 3 or 4 clocks to process the data. Even 4 bits might work. Classic "flash" ADCs were fast, but needed 2^N comparators.


"scrubbing" below the FTL

Started by Don Y in sci.electronics.design8 years ago 31 replies

Hi, When implementing a persistent store in FLASH technology, how do you "scrub" below the FTL? I.e., is this even possible without windows...

Hi, When implementing a persistent store in FLASH technology, how do you "scrub" below the FTL? I.e., is this even possible without windows *through* the FTL? Or, support for a "scrub" operation exported by the FTL? Building the example from more conventional (e.g., magnetic media), ideally, any "sectors" (lets ignore blocking for the moment) that are written in a file are effectively...