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802.11weed posted:you guys wanna see some really fuckin janky electronic hack? I don't understand what's happening here.
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Mar 2, 2014 04:29
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capcom pinball used surface-mounted everything and someone hacked socketed chips onto where the surface-mounted... something goes. this makes certain chips (like the LM339s that are part of the switch matrix, I think i see an LM part number on one of those) unreliable. capcom didn't have any pinball experience (williams and bally had their own designs forever, data east ripped off williams for their board, sega bought data east pinball and evolved that board set, stern got the corpse of sega pinball and evolved that board set) so they made really stupid design decisions such as high scores saved onto a surface-mounted zero-power ram chip instead of battery-backed sram, small-gauge wire everywhere, electrolytic caps too big to be mounted vertically, etc. quote:The switch matrix board also has another problem, the use of surface mount LM339 chips. Luigi Thirty fucked around with this message at 05:40 on Mar 2, 2014 |
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Mar 2, 2014 05:33
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i wrote a python script to crawl through sa and download all the attachments to try to find something i can get an ik to switch to my av, but it takes far too long and multi threading doesnt seem to work too well
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Mar 2, 2014 05:47
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Valeyard posted:i wrote a python script to crawl through sa and download all the attachments to try to find something i can get an ik to switch to my av, but it takes far too long and multi threading doesnt seem to work too well I don't understand what any of this means.
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Mar 2, 2014 05:58
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Citizen Tayne posted:I don't understand what's happening here. a Very Bad Thing
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Mar 2, 2014 06:31
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My dad would have understood. He did all that electronics stuff, and died impoverished at 46.
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Mar 2, 2014 06:32
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Citizen Tayne posted:I don't understand what's happening here. someone wired up a square peg to fit in a round hole
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Mar 2, 2014 06:36
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Sagebrush posted:a Very Bad Thing a matter of persepective he made which shouldnt have worked, work. that is always the greatestr
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Mar 2, 2014 08:51
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echinopsis posted:he made which shouldnt have worked, work. that is always the greatestr steve
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Mar 2, 2014 09:11
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Doc Block posted:So after the whole thing where the diode on my fume extractor was too hot to touch, I bought the biggest diode I could find on Jameco. A handful of them arrived in the mail today. i have a bunch of those that i bought for some project years ago and haven't got around to putting together yet. i have no idea what the project was.
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Mar 2, 2014 10:28
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The Humungous Diode Project
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Mar 2, 2014 16:14
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01011001 posted:quick and dirty pcb for giant babbys based on my half-baked memories of my packaging class 2 years ago: -dont do your etching in an aluminum pan liner because ferric chloride+aluminum->exothermic reaction and the resulting heat makes the next bit of the reaction go faster and faster and pretty soon you've got a tub of boiling chemicals spitting crap all over and emitting a cloud of toxic fumes and you have to run the gently caress out of the garage and stand in the driveway waiting for things to clear out while wondering if the chlorine gas is gonna gently caress up your tools and/or car (spoiler: it did not)
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Mar 2, 2014 17:17
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Dr. Honked posted:The Humungous Diode Project
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Mar 2, 2014 20:33
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PDP-1 posted:-dont do your etching in an aluminum pan liner because ferric chloride+aluminum->exothermic reaction and the resulting heat makes the next bit of the reaction go faster and faster and pretty soon you've got a tub of boiling chemicals spitting crap all over and emitting a cloud of toxic fumes and you have to run the gently caress out of the garage and stand in the driveway waiting for things to clear out while wondering if the chlorine gas is gonna gently caress up your tools and/or car (spoiler: it did not)
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Mar 2, 2014 20:45
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PDP-1 posted:-dont do your etching in an aluminum pan liner because ferric chloride+aluminum->exothermic reaction and the resulting heat makes the next bit of the reaction go faster and faster and pretty soon you've got a tub of boiling chemicals spitting crap all over and emitting a cloud of toxic fumes and you have to run the gently caress out of the garage and stand in the driveway waiting for things to clear out while wondering if the chlorine gas is gonna gently caress up your tools and/or car (spoiler: it did not) whoa, poo poo yeah dont do that
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Mar 3, 2014 00:38
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Also, don't dump that poo poo down a stainless steel sink.
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Mar 3, 2014 01:01
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Doc Block posted:Also, don't dump that poo poo down a stainless steel sink. Oh yeah, that reminds me of high school chemistry when our teacher would tell us to just dump lead chromate down the sink.
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Mar 3, 2014 01:39
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Doc Block posted:Also, don't dump that poo poo down a stainless steel sink. yeah i mean the baking soda should help with most of that but most likely not nearly enough to make your nice stainless steel sink not suddenly a shithole
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Mar 3, 2014 01:54
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i just did my first etch a few weeks ago and i just ran the faucet while dumping it down. I only used like 2 oz in a ziplock bag, so a few cups of water is going to dilute it to nothing, right?
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Mar 3, 2014 06:07
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don't dilute it you fool, you'll only make it stronger!
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Mar 3, 2014 06:10
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quadpus posted:i just did my first etch a few weeks ago and i just ran the faucet while dumping it down. I only used like 2 oz in a ziplock bag, so a few cups of water is going to dilute it to nothing, right? depending on what chemical you're using, it can be saved and reused a few times. just dump it back into a sealed plastic container (not the original bottle, though, since you want to keep that at full strength). if you do save it for reuse, LABEL THE gently caress OUT OF THAT CONTAINER, AND DON'T STORE IT NEAR FOOD. ESPECIALLY DO NOT STORE IT ABOVE FOOD, IN CASE THE CONTAINER LEAKS. as to whether or not you diluted it enough, v  v. I haven't messed with PCB etching since high school.
Doc Block fucked around with this message at 07:35 on Mar 3, 2014 |
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Mar 3, 2014 07:32
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Citizen Tayne posted:Oh yeah, that reminds me of high school chemistry when our teacher would tell us to just dump lead chromate down the sink. people bring us drugs to dispose of but we just pour them down the sink
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Mar 3, 2014 07:56
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You are even allowed to dump radioactive materials down the drain if you dilute it enough, for example scintillation solutions.
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Mar 3, 2014 09:51
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yeah when i was first told to just dump formaldehyde down the sink with a bunch of water i was appalled
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Mar 3, 2014 11:48
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welp there are auto shops that just dump old oil down the drain im sure a lil bit of formaldehyde pales in compairson
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Mar 4, 2014 08:36
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Trig Discipline posted:yeah when i was first told to just dump formaldehyde down the sink with a bunch of water i was appalled formaldehyde breaks down in sunlight so diluting and dumping it is probably the best possible option
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Mar 5, 2014 21:31
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welp, guess ive found my new idiot spare time project
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Mar 6, 2014 01:44
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i have way too much faith in our water treatment infrastructure
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Mar 6, 2014 02:02
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i've often thought about building one of those but they really have no use i guess "novelty sun lamp"
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Mar 6, 2014 02:31
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bizarre, i never thought of deuterium as an explosive gas, but of course it's just hydrogen radioactive hydrogen 
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Mar 6, 2014 09:20
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if you've got a vacuum pump + high voltage supply lying around a farnsworth fusor is p simple to set up iirc v pretty too http://www.youtube.com/watch?v=38xVBd60yas&feature=youtu.be&t=48s
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Mar 6, 2014 16:34
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let's be honest, that guy just wanted to set the curve on instructables
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Mar 6, 2014 16:36
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apart from tell people you built a fusion reactor, does it have any actual use? ive been wanting to use unity to do something for a while but can nnever settle on a good idea
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Mar 6, 2014 16:48
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Jonny 290 posted:let's be honest, that guy just wanted to set the curve on instructables the whole thing reads like that troy mclure diy foundation repair video from the simpsons. “Now, do you have extruded polyvinyl foam insulation?” "No." "Good. Assemble the aluminum J-channel using self-furring screws. Install." "Wait a minute—" "…you’ll need corrosion-resistant metal stucco lath." "Wait a minute!" "Now parge the lath."
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Mar 6, 2014 16:49
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Valeyard posted:apart from tell people you built a fusion reactor, does it have any actual use? coffeetable fucked around with this message at 12:25 on May 12, 2015 |
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Mar 6, 2014 16:52
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coffeetable posted:nope hi andy! 
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Mar 6, 2014 16:54
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hi
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Mar 6, 2014 17:04
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coffeetable posted:nope hey that is pretty neat. i dont understand fully whats going on, but still i know someone that is using it to make an aircraft evacuation simulation which is also pretty neat
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Mar 6, 2014 17:16
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updating yospos.xlsx w/ ur name ty
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Mar 6, 2014 17:21
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Valeyard posted:i dont understand fully whats going on, but still it is a shallow water model http://en.wikipedia.org/wiki/Shallow_water_equations simplest model of a planet's atmosphere there is. incompressible, inviscid fluid + gravity + coriolis. should evolve towards something like this if you leave it alone  future milestones: document it, get the CUDA backend working properly, get vertical layers working, get temperature working coffeetable fucked around with this message at 18:33 on Mar 6, 2014 |
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Mar 6, 2014 18:25
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