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Feb 11, 2015 21:51
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| # ? May 15, 2024 17:44 |
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wesley snypes posted:
requesting this be a 3d animation with this music https://www.youtube.com/watch?v=gBqGC9sVBXY&t=51s and the skull slowly slipping out of th screen
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Feb 12, 2015 06:54
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Jonny 290 posted:yeah iirc 1-wire devices leech power from the bus during downtime and their energy cap is measured in nF i think 1-wire must have been developed on a dare
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Feb 12, 2015 07:14
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Jonny 290 posted:yeah iirc 1-wire devices leech power from the bus during downtime and their energy cap is measured in nF i think [ASK] me about bit banging 1 wire read and writes with nothin but Texas Instrument's p. decent documentation
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Feb 12, 2015 07:16
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with a bit of fiddling you can keep a 1wire device dead without power draw
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Feb 12, 2015 07:18
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Mido posted:with a bit of fiddling you can keep a 1wire device dead without power draw there's a lot you can kill with a bit of fiddling
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Feb 12, 2015 07:22
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eschaton posted:there's a lot you can kill with a bit of fiddling i2c me 
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Feb 12, 2015 07:25
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Mido posted:i2c me i'm the spy by wire
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Feb 12, 2015 07:25
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hobbesmaster posted:i'm the spy by wire master in slave out if you know what i mean
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Feb 12, 2015 07:27
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neg my chip select
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Feb 12, 2015 07:46
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hobbesmaster posted:neg my chip select twist my pot
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Feb 12, 2015 08:02
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resist my flow
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Feb 12, 2015 08:03
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those are communications related 
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Feb 12, 2015 08:31
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did someone say supercap
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Feb 12, 2015 08:33
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Raluek posted:did someone say supercap What kind of device need 470F of capacitors and what is the onrush current draw?
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Feb 12, 2015 11:18
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I'm not sure what the original application is; I picked it up at Halted because it was cool. It's made by Fuji Electric High-Tech Corp and is called "SCU" according to the sticker on it, which I assume means "super capacitor unit" but idk wait poo poo ive been using capitals and punctuation and poo poo i think i remember looking the caps up and finding that they have a pretty high internal resistance, so id expect that they're for some sort of rail stiffening or something, rather than a huge amount of rush current
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Feb 12, 2015 11:23
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upon cursory googlin', it appears to be a raid array cache "battery" bank http://www.ebay.com/itm/Fujitsu-CA05954-0060-Cache-Backup-Expansion-Unit-/161335857151 similar to that, same part number except for the end bit. so id guess this is for something very similar
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Feb 12, 2015 11:25
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wesley snypes posted:
p sweet alpha channel
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Feb 12, 2015 14:56
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oscilloscopes and stuff 90 minute dig into a 100 ghz scope https://www.youtube.com/watch?v=U3w_EWgGQuk
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Feb 14, 2015 23:35
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Raluek posted:id expect that they're for some sort of rail stiffening 
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Feb 15, 2015 03:03
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should i get this http://www.ebay.com/itm/220V-HAKKO-936-AQ28-ESD-SAFE-Electronic-Iron-soldering-station-D-27-/151358382294 thank
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Feb 15, 2015 03:11
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my coworker has a few of the chinese ones with all the vowels in the name and honestly theyre pretty dang good
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Feb 15, 2015 04:59
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so i need to be able to program some simple little spi flash chips, whats the professional version of bus pirate/flashrom because thats slow as molasses
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Feb 15, 2015 07:29
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maybe a xeltek is01? i think our mfg folks use that
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Feb 15, 2015 15:53
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hobbesmaster posted:so i need to be able to program some simple little spi flash chips, whats the professional version of bus pirate/flashrom because thats slow as molasses bit bang it with an arduino  (really easy to do actually, and potentially "fast enough")
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Feb 15, 2015 20:33
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the total phase aardvark is a pretty cheap spi/i2c host adapter that can do SPI @ 8MHz
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Feb 15, 2015 21:39
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Mido posted:bit bang it with an arduino is there any reason you wouldn't use the arduino / avr's hardware SPI? i'm not familiar with the arduino but i'm familiar enough with mcu's to know the simplest peripherals can be broken pos's 
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Feb 15, 2015 21:48
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Barnyard Protein posted:the total phase aardvark is a pretty cheap spi/i2c host adapter that can do SPI @ 8MHz so wait the bus pirate is 8mhz, I have a 64Mbit flash. it shouldn't take 30 minutes to write. is this just flashrom being terrible?
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Feb 16, 2015 02:33
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Yeah maybe its not the flashrom thats the problem. i googled "64Mbit spi flash" and this is the first data sheet i found. http://ww1.microchip.com/downloads/en/DeviceDoc/25036B.pdf this fellow has 256 byte pages, a "fast" 1.5ms page program time, this is about 45 seconds Jerry Bindle fucked around with this message at 03:46 on Feb 16, 2015 |
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Feb 16, 2015 03:08
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hopefully it isn't doing something moronic with the flash like trying to write it byte-at-a-time resulting in 256 read-modify-writes per page
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Feb 16, 2015 04:09
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Barnyard Protein posted:Yeah maybe its not the flashrom thats the problem. i googled "64Mbit spi flash" and this is the first data sheet i found. http://ww1.microchip.com/downloads/en/DeviceDoc/25036B.pdf yeah was working that out when you did the edit. the chip in question is actually the winbond equivalent, small spi flash chips are all very similar though when i said flashrom i meant the program flashrom which was originally intended for open source/free software crazy people to modify their motherboard's bios
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Feb 16, 2015 04:10
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64Mbit/115kbaud = 600s.
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Feb 16, 2015 04:37
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where does the 115k baud come from?
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Feb 16, 2015 04:54
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a bus pirate uses a usb serial port for all commands
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Feb 16, 2015 05:00
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flashcat looks like exactly what I want
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Feb 16, 2015 05:28
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i am looking for a decent reference for rf circuits things. coworker told me some website like rfcircuits.com or something but coworker was wrong. any suggestions?
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Feb 16, 2015 19:03
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the necronomicon
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Feb 16, 2015 19:06
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Blotto Skorzany posted:the necronomicon analog is magic already so this is absolutely right
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Feb 16, 2015 21:49
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Bloody posted:i am looking for a decent reference for rf circuits things. coworker told me some website like rfcircuits.com or something but coworker was wrong. any suggestions? if you're taking book suggestions i used this in school, it does a decent job explaining modulation forms, radio receivers/transmitters and transmission line stuff, IIRC it was pretty good at showing circuit examples too http://www.amazon.com/Modern-Electronic-Communication-9th-Edition/dp/0132251132
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Feb 16, 2015 22:14
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| # ? May 15, 2024 17:44 |
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the ARRL Handbook is also really good to keep around I remember one time at a ham club meeting i won a copy of the ARRL Antenna Book and holy poo poo that was like better than any box of candy to my nerdy self
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Feb 16, 2015 22:20
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