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<cyrozap>
Stupid/crazy/off-topic idea: I wonder if it would be possible to get high-res scans of IC dies using a CD/DVD/Blu-ray laser... Of course if it is possible, the image wouldn't be nearly as good as what you could get from an SEM, but maybe with some fancy signal processing you could get a better image than what you could get with an optical microscope.
<rqou>
i doubt it'll be better than tricks already achievable with computational microscopy
<cyrozap>
Yeah, probably.
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<rqou>
also OT: why do i always seem to have insufficiently-long USB cables
<rqou>
why is USB terrible?
<cyrozap>
I was just thinking about how a hobbyist might go about making super-high-res images of IC dies without having to rent time on a SEM/buy super expensive equipment.
<cyrozap>
Monoprice, yo
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<cyrozap>
You can get them in a bunch of lengths, they pretty inexpensive, and they're good quality.
<rqou>
i did that earlier to get a whole bunch of A to B/miniB/microB cables
<rqou>
now i'm finding that my pc to my work desk is too far
<cyrozap>
If you're so far away your USB cable can't reach, you probably shouldn't be using USB for that :P
<rqou>
oh yeah, i just rearranged my room so that's part of the problem
<cyrozap>
Linux has a USB-over-Ethernet kernel module, so you can share USB devices over a network.
<rqou>
wait you can?
<rqou>
why didn't anybody tell me about this?
<rqou>
can I also use this to fuzz the device drivers?
<cyrozap>
Yup, it's somewhat popular in the OpenWrt/LEDE/whatever-it-is-now community.
<cyrozap>
I don't know about fuzzing
<cyrozap>
But you can just fuzz it on the host directly
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<rqou>
hmm, except now i need another linux box
<rqou>
the "fuzzing" thing is just "this means that there is a virtual host controller driver and i didn't have to write one"
<cyrozap>
Oh, yeah
<cyrozap>
If you need a super cheap-o Linux box, search for "3G router" on AliEx/Ebay. There are these mini tube-shaped ones with USB on one end and ethernet on the other. Be warned, though, there's a bunch of variants and not all of them work with OpenWRT.
<rqou>
i should just copy azonenberg and start migrating everything to ethernet
<azonenberg>
+1
<azonenberg>
cyrozap: I discussed using bluray lasers for direct write lithography
<azonenberg>
but never considered it for imaging
<rqou>
hmm apparently a lot of super-resolution microscopy was invented for biologists and relies on florescence
<rqou>
there's a structured-illumination technique that i'm not familiar with
<rqou>
hey azonenberg what's the cheapest microcontroller with ethernet?
<azonenberg>
rqou: a random PIC and an ENC28J60 probably
<rqou>
i heard those are really buggy?
<azonenberg>
or maybe one of those Wiznet parts that has a PHY, MAC, and hard-IP TCP/IP stack?
<azonenberg>
I havent used the 28J60
<azonenberg>
I've used the ENC424J600
<azonenberg>
the 10/100 big brother with SPI and parallel interfaces
<cyrozap>
rqou: Depending on your definition of "cheap", the STM32F4 may be an option.
<rqou>
yeah i was thinking probably those
<cyrozap>
But to be honest you'd save a lot of time by just buying a cheap Linux mini-PC with GPIO.
<rqou>
no i was thinking for a new custom design rather than for retrofitting
<cyrozap>
In that case, choose a micro that can run an RTOS with Ethernet and TCP/IP support--you really don't want to have to write that stuff yourself.
<davidc___>
rqou: even for custom designs; its _really_ hard to be the RPI compute module/etc
<davidc___>
or some of the little MIPS mediatek modules
<davidc___>
of course, depends on your volume/required lifetime :)
<rqou>
except for sourcing difficulty? :P
<cyrozap>
rqou: And even if it does "support" that microcontroller, some RTOSes are easier to get started with than others.
<davidc___>
rqou: as I said, completely different story for 1-off vs 10-off vs 10k/5yr-off :)
<rqou>
i have yet to be able to buy any of the rpi zero boards in quantities of 2, so that doesn't give me very much confidence in them
<davidc___>
rqou: theres the RPI compute module; supposedly thats design-in-able
<rqou>
right, but i have no confidence in their ability to supply them when they can't even supply enough rpi zeros for me to be able to buy 2+
<rqou>
every distributor i've seen is limited to one per customer