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Sagebrush posted:If you want lots and lots of GPIO pins just get yourself something like the MCP23017 16-channel I2C port expander. $1.25 and a bit of software and you have 16 extra IOs. Use all 127 addresses on the I2C bus and you have 2032 pins. Go nuts But what if he needs 6000 relays and switches? Maybe he's playing WoW with a custom controller.
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Nov 6, 2018 10:15
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Rexxed posted:But what if he needs 6000 relays and switches? Maybe he's playing WoW with a custom controller. Keyboard matrix maybe
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Nov 6, 2018 21:07
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mewse posted:Keyboard matrix maybe I know we're veering off topic and it's kind of my fault but this reminded me of Tom Scott doing a goofy emoji keyboard with a bunch of keyboards and autohotkey. He's a little longwinded since he's geared for a non-technical audience but as a long time AHK user I thought it was kind of interesting: https://www.youtube.com/watch?v=lIFE7h3m40U
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Nov 6, 2018 23:10
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Rexxed posted:I know we're veering off topic and it's kind of my fault but this reminded me of Tom Scott doing a goofy emoji keyboard with a bunch of keyboards and autohotkey. He's a little longwinded since he's geared for a non-technical audience but as a long time AHK user I thought it was kind of interesting: I mentioned keyboard because I think that chip sagebrush mentioned is used in the dactyl split DIY keyboard that I have
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Nov 6, 2018 23:20
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mewse posted:Keyboard matrix maybe Actually industrial automation. I did a really small project just for fun (fake elevator with vintage brass hardware and working floor indicator, lights, buttons, music, etc) and I was shocked at how many inputs/outputs I needed for a super simple project on a lark. I have some ideas in mind for real work projects and they'll involve many more inputs and outputs. I'm not trying to say my needs are super special, I'm saying I don't know what I don't know.
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Nov 8, 2018 01:26
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Use a PLC, bro
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Nov 8, 2018 07:00
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Kinda low level aren't they? Ive deployed like 12 rpis in various situations, and 11 of them drive some sort of display and use some amount of CPU
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Nov 8, 2018 13:19
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If you're using Raspberry Pis at your job I hope it isn't in an application that's fatal or maiming if it fails
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Nov 8, 2018 14:52
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Uhhh no they're not.
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Nov 8, 2018 18:57
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If you’re using a RPi at your job and it’s not for teaching computer touching just welp
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Nov 10, 2018 17:15
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evil_bunnY posted:If you’re using a RPi at your job and it’s not for teaching computer touching just welp You got a reason why or are you just being argumentative?
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Nov 11, 2018 03:18
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A pi feeds my cats every day 😎
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Nov 11, 2018 03:25
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revmoo posted:You got a reason why or are you just being argumentative? Look at the thread title for one thing. A raspberry pi is a fun toy to do a little project with or something that isn't important.
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Nov 11, 2018 03:32
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There's a big gap between rated for hobbyist use and rated for industrial use too. Obviously if you're gonna run a kiosk in the lobby no one cares. But don't run business critical poo poo on it. Unless you know how to get an sd card to never corrupt itself on a power glitch.
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Nov 11, 2018 04:09
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Thing with Pis to me is that they are so cheap that I can keep a stack of them and replace them without thinking twice about it. I have a standardized iso I can dd onto an SD ahead of time. I've got so many of those little micro sd usd adapters that I can literally image like 6 at a time. If it checks all the boxes for my needs I don't care if it's a toy or not. I'm using most of them for kiosk use for inventory tracking in our facility. I have a standardized design I fabricated into a single unit consisting of a display, barcode scanner, and pi. It takes a single power cord and cat5 cable, and provisioning involves sticking an sd into a PC and editing a url.txt to tell it what role it is. The entire integrated kiosk unit runs like $150 in parts and we can swap out the entire unit at the first sign of trouble rather then even bothering with diagnostics. Which has been totally uneccessary by the way.. in over a year of production use in a manufacturing facility I've seen zero failures of any kind. I'm not running any finger-mangly machines off of them, and was really just looking for some insight into what the upgrade path was for those who want more i/o. The concern trolling is a little ridiculous.
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Nov 11, 2018 11:16
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It's just fine for your use case, but the reason people tend to use Pi's is the GPIO, and from there it gets to horrifying failure modes pretty quick. Also I've no idea what the package update pipeline is, but my guess is "not great"
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Nov 11, 2018 11:31
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evil_bunnY posted:It's just fine for your use case, but the reason people tend to use Pi's is the GPIO, and from there it gets to horrifying failure modes pretty quick. Also I've no idea what the package update pipeline is, but my guess is "not great" This has been my experience, I am underwhelmed by its GPIO capabilities. I was surprised by the fact that they can't really handle relays without additional circuitry, which to me seemed like what would have been an almost primary use-case.
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Nov 11, 2018 14:18
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evil_bunnY posted:It's just fine for your use case, but the reason people tend to use Pi's is the GPIO, and from there it gets to horrifying failure modes pretty quick. Also I've no idea what the package update pipeline is, but my guess is "not great" Actually, I think a lot of the reasons people tend to use Pi's in "production" scenarios is because they're dead cheap for a full-blown (albeit low-powered) PC + HDMI out in a tiny form factor. They may not be the best fit device for many of the applications they end up being used for but they're good and cheap enough that people will work around the warts to make things work.
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Nov 11, 2018 15:19
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Yup. They are order of magnitudes cheaper, and tbh they're the most reliable computers _I_ am aware of. No moving parts or fans makes for an incredibly reliable PC. I evaluated a bunch of different devices before landing on Pis and they have been very good to me.
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Nov 11, 2018 15:42
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revmoo posted:This has been my experience, I am underwhelmed by its GPIO capabilities. I was surprised by the fact that they can't really handle relays without additional circuitry, which to me seemed like what would have been an almost primary use-case.
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Nov 11, 2018 16:22
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I just took my first slice of Raspberry Pi ( ) and ordered one. Not planning on doing anything fancy with it outside of running pi-hole at home. But, I've been interested in getting one for years now, so this is basically my early Xmas present to myself.
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Nov 11, 2018 17:22
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Beware: you’ll start wanting to use it for every computer-related project ever.
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Nov 11, 2018 17:26
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I had one that was collecting dust and made a PiHole, I feel like a genius getting it all to work and letting it do DHCP on my network. I may do PiVPN but I don't really need the ad-blocking stuff for my phone. I am going to get another one and attempt a magic mirror project, or at least a monitor as a neat little screen for the house.
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Nov 11, 2018 19:51
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Can the pi hole handle gigabit speeds for those of us lucky enough? I know it runs on the USB subsystem for ethernet..
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Nov 11, 2018 22:51
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My understanding is that it's just a DNS server, so it won't have any effect on your transfers. Initial DNS lookup, once per packet, will probably add a microsecond or two to your latency I guess
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Nov 11, 2018 22:57
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I haven’t noticed any problems with my gigabit speeds but if you want I can run a test when I get back on my desktop.
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Nov 11, 2018 23:31
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ante posted:My understanding is that it's just a DNS server, so it won't have any effect on your transfers. Initial DNS lookup, once per packet, will probably add a microsecond or two to your latency I guess This is my understanding as well. Pi hole is a dns server (built on dnsmasq?) it doesn’t route all your traffic through the pi which would have performance concerns
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Nov 12, 2018 00:45
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revmoo posted:Thing with Pis to me is that they are so cheap that I can keep a stack of them and replace them without thinking twice about it. I have a standardized iso I can dd onto an SD ahead of time. Also in my experience they are quite reliable. I have a few that have been in 24/7 use for years at this point and so far only one SD card has died. Every one of the boards is still good, even my original 1B that started its life as an emulator box, then ended up running a customer's background music system for a few years before making it back to me. At one point we even tested using them as thin clients for a Terminal Services environment, but that customer ended up going down a path that has us eliminating the terminal server over the long term so it wasn't worth pursuing further. I know that at least one thin client vendor has jumped in with both feet on that one though and is offering an officially supported Pi-based device that they publicly admit is just a Pi 3 inside. revmoo posted:This has been my experience, I am underwhelmed by its GPIO capabilities. I was surprised by the fact that they can't really handle relays without additional circuitry, which to me seemed like what would have been an almost primary use-case. wolrah fucked around with this message at 16:51 on Nov 12, 2018 |
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Nov 12, 2018 16:46
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Is it common for non-industrial things with GPIO to have the ability to directly drive relays? I don't exactly have extensive experience with this sort of thing but I've never seen that as a standard feature. It's not too difficult to add a MOSFET and flyback diode in any case.
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Nov 12, 2018 17:01
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Industrial poo poo worth anything is driven by PLCs
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Nov 12, 2018 17:26
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There's no way you can expect to drive a high power load directly off the GPIOs of any processor on the planet. The internal bonding wires, if nothing else, can't take much current. If you're sinking or sourcing more than at most 100 milliamps (and usually more like 10) you need some kind of transistor or relay driver system.
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Nov 12, 2018 18:13
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evil_bunnY posted:Industrial poo poo worth anything is driven by PLCs Stuxnet would also agree 
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Nov 12, 2018 18:22
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Should I not be running my centrifuge on a RPi?
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Nov 12, 2018 19:54
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On it and in it.
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Nov 12, 2018 20:02
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Has anyone ever tried the Orange Pi or Banana Pi boards you can get on AliExpress etc. for like 15 bucks? How do they compare to RPis?
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Nov 17, 2018 02:40
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Has anyone had problems with a Steam Link not being able to find a PC when using pihole? If I map the Steam Link statically and look up the computer by IP it works, but the Steam Link won’t detect anything automatically. I feel like it has to be related to the pihole, but I haven’t tried disabling it yet.
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Nov 17, 2018 23:45
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Considering picking up a Pi for my 7 year old to play some Minecraft, learn to code and how computers work. Was looking at the Kano OS as a great tool to do so, and seems like the B+ isn't supported yet. The real question that I have is, how does Minecraft run on the 3B or 3B+? Not looking for high-res craziness, just something that doesn't suck and maybe he can even play online with his brothers.
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Nov 18, 2018 01:09
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Minecraft Pi is an aged lobotomized one that's best used to play with scripting. It's less a game and more a learning tool. Real Minecraft won't run on the Pi, I'm like 99% sure. Frankly, most of the games accessible on the repository for the Pi won't run on the Pi, as I found when trying to play Dungeon Crawl Stone Soup.
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Nov 18, 2018 01:15
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doctorfrog posted:Minecraft Pi is an aged lobotomized one that's best used to play with scripting. It's less a game and more a learning tool. Real Minecraft won't run on the Pi, I'm like 99% sure. Frankly, most of the games accessible on the repository for the Pi won't run on the Pi, as I found when trying to play Dungeon Crawl Stone Soup. Good to know! I won't consider Minecraft in this then, very helpful.
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Nov 18, 2018 01:19
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I don't know much about 7 year olds, but at that age the Pi is probably best as a parent-child kinda thing. Pick a project you're both interested in on the Pi website, and build it together. Might start enough interest to where they're willing to look past the considerable jank you're likely to run into with the Pi and get some stuff done on their own. If it's for brothers to play together, it's great as a cheap emulator machine. IMO the sheer internet interest in the thing as a retro game player means a lot of the kinks are ironed straight out of the pre-made images. Supply your own (legally obtained) ROMs, of course.
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Nov 18, 2018 01:29
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