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TheresaJayne posted:How do HDD with USB even work? Transformers don't have to be super large if they aren't making a lot of power, like the screen might need 52 volts but it's likely at a very low current draw compared to other parts of the system. But yeah there are 'tricks' to get higher voltage at the expense of lower current, like a boost converter: https://en.wikipedia.org/wiki/Boost_converter
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Jan 6, 2019 20:45
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mod sassinator posted:Transformers don't have to be super large if they aren't making a lot of power, like the screen might need 52 volts but it's likely at a very low current draw compared to other parts of the system. But yeah there are 'tricks' to get higher voltage at the expense of lower current, like a boost converter: https://en.wikipedia.org/wiki/Boost_converter It's interesting to pull apart an old camcorder from the analog tape era - a lot of them used tiny little monochrome CRTs, running somewhere in the neighborhood of a kilovolt, starting with the handful of volts a crappy NiCd battery pack could give. A few people have actually turned them into displays for RPis, too. Since they generally run from a control board that takes low voltage and a composite video signal, it's not a difficult hack.
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Jan 6, 2019 23:53
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https://www.youtube.com/watch?v=WY7olqQF8iM Nice little demo of one of those tiny CRTs.
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Jan 7, 2019 03:36
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I was thinking of creating an emulation box and I heard Raspberry Pi was a good choice. How well does the most powerful stand up for this? What's the best system it can run reasonably? I mostly want it for 2d fighting games. Can Raspberry pi handle Dreamcast emulation?
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Jan 7, 2019 05:03
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Rutibex posted:I was thinking of creating an emulation box and I heard Raspberry Pi was a good choice. How well does the most powerful stand up for this? What's the best system it can run reasonably? I mostly want it for 2d fighting games. Can Raspberry pi handle Dreamcast emulation? Dreamcast is pushing it. It can do PSX. 2d fighting games should be no problem, it runs mame and final burn alpha.
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Jan 7, 2019 05:15
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Rutibex posted:I was thinking of creating an emulation box and I heard Raspberry Pi was a good choice. How well does the most powerful stand up for this? What's the best system it can run reasonably? I mostly want it for 2d fighting games. Can Raspberry pi handle Dreamcast emulation? It's bad for emulation. Use an old PC you or someone else has lying around - it'll play the games better both from having access to up to date emulators and raw power. The Pi is definitely not capable of giving you good Dreamcast emulation, and it'll struggle a lot with mid 90s and newer 2d arcade fighters. The most recent system the Pi can run reliably is Genesis and SNES, and even then some high end SNES stuff will slow down.
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Jan 7, 2019 06:37
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fishmech posted:It's bad for emulation. Use an old PC you or someone else has lying around - it'll play the games better both from having access to up to date emulators and raw power. The specs on the raspberry pi model 3 B+ is a lot better than something like the original Xbox, and I used that for emulation up to n64 just fine. Though I guess the graphics card is less powerful on the pi. I dont really want to use a full blown PC, i kind of like the idea of it being a tiny box I can fit in my pocket.
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Jan 7, 2019 14:29
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Emulators have gotten better since the XBOX and with that they've also gotten a lot more demanding. The Pi's suite of emulators, with some exceptions, are based on older versions which are less compatible and accurate than what you can use on a modern PC. MAME and SNES suffers from this the most, 8/16bit Sega stuff is close to perfect on the Pi though.
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Jan 7, 2019 14:37
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SwissCM posted:Emulators have gotten better since the XBOX and with that they've also gotten a lot more demanding. The Pi's suite of emulators, with some exceptions, are based on older versions which are less compatible and accurate than what you can use on a modern PC. MAME and SNES suffers from this the most, 8/16bit Sega stuff is close to perfect on the Pi though. That's surprising, isn't the raspberry pi Linux based? I thought most emulators were written for Linux natively by super nerds then ported to PC afterwards.
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Jan 7, 2019 14:45
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Rutibex posted:That's surprising, isn't the raspberry pi Linux based? I thought most emulators were written for Linux natively by super nerds then ported to PC afterwards. You can run newer emulators on the Pi, they're often just too slow to be usable.
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Jan 7, 2019 14:46
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RetroPi is the go to dedicated RPi emulator suite. It uses RetroArch. Not counting rough spots, an RPI2 or 3 can emulate up to and including the PS1. Another way to think about it: PS2, GCN, XBOX, Dreamcast, Sega Saturn, and DS are the hard barrier in terms of power. N64 is a crap shoot. Arcade emulation limits are harder to define, but I can verify that an RPI2 or 3 can run Street Fighter 3 and Mars Matrix, but not MVC2. The only games I've had intermittent frame rate issues with were SotN (but I'm told it was like that in the original) and, of all things, Kirby's Dream Land 3. See also: https://forums.somethingawful.com/showthread.php?threadid=3831406
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Jan 7, 2019 15:03
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Serenade posted:but not MVC2.  Dang this was the one I really wanted. I asked about Dreamcast emulation because my lovely tablet can emulate MvC2 on Dreamcast just fine so I figured the pi might be able to handle it.
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Jan 7, 2019 15:12
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Rutibex posted:The specs on the raspberry pi model 3 B+ is a lot better than something like the original Xbox, and I used that for emulation up to n64 just fine. Though I guess the graphics card is less powerful on the pi. I dont really want to use a full blown PC, i kind of like the idea of it being a tiny box I can fit in my pocket. No they are not much better. The GPU is still a 10+ year old smartphone GPU which is well behind even an original Xbox's capability, and this absolutely cripples it for things like Dreamcast, latter era arcade, and even a wide swathe of PS1/Saturn/N64 titles. If you want something that can run them and fits in a pocket, buy/use an older smartphone with an HDMI out function on it, they will have improved GPU performance and can do a reasonable job for much more consoles. Rutibex posted:That's surprising, isn't the raspberry pi Linux based? I thought most emulators were written for Linux natively by super nerds then ported to PC afterwards. Most emulators are written for Windows on x86 primarily, and the rest are for x86 Linux primarily. The Pi systems are ARM.
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Jan 7, 2019 15:39
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fishmech posted:The most recent system the Pi can run reliably is Genesis and SNES, and even then some high end SNES stuff will slow down. However feast your eyes on these beauties which came out recently; RetroFlag MEGAPi Case  RetroFlag SUPERPi Case 
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Jan 7, 2019 16:19
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Super Slash posted:Absolutely this, every time I've tried to use a Pi for emulators it's never been able to go above the Mega Drive (even SNES games like Starfox/F-Zero will run like garbage). Those cases are awesome, i looked at them about a month ago! The genesis one has an eject button and the lid pops open where the cartridge would have gone, and it has a little storage space under it, perfect for holding sd cards, maybe even a usb cord?
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Jan 7, 2019 16:44
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fishmech posted:If you want something that can run them and fits in a pocket, buy/use an older smartphone with an HDMI out function on it, they will have improved GPU performance and can do a reasonable job for much more consoles. My other option was one of those Android TV boxes, that's basically just a cell phone without a screen and an HDMI port. But those don't have cool retro cases available like the ones just posted.
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Jan 7, 2019 17:21
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ETA prime said the amazon firestick has a beefier processor than raspberry pi
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Jan 7, 2019 17:41
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Super Slash posted:Absolutely this, every time I've tried to use a Pi for emulators it's never been able to go above the Mega Drive (even SNES games like Starfox/F-Zero will run like garbage). aaaaaaaaaaaaaand purchased
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Jan 7, 2019 18:03
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mewse posted:ETA prime said the amazon firestick has a beefier processor than raspberry pi
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Jan 7, 2019 18:13
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Bourricot posted:Raw power isn't everything: driver quality and optimization also matter. The Pi is still left in the dust on that score as the current Fire TV Sticks use a semi-low-end GPU from about 2017 instead of a low end smartphone GPU from 2006 like the Pi still does. The current Fire TV Stick has 1.5 GB of DDR4 RAM, the Pi 3b+ is still 1 GB of DDR2. The Fire TV Stick has a 1.7 GHz quad core 64 bit ARMv8 CPU, the 3b+ is 1.4GHz 64 bit ARMv8. The primary limiter for the stick is that it just has 8 GB of onboard storage that can't be expanded, and there's also no USB ports so anything you use with it has to be bluetooth. Of course there are many similar devices from companies like ODROID that have the same specs but do have proper support for expansion and connecting things by USB.
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Jan 7, 2019 18:48
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fishmech posted:ODROID  This is exactly what I'm after! Much beefier than the pi and just the right size.
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Jan 7, 2019 19:32
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Rutibex posted:
Sorry I'm late to the party. But this is what I came here to tell you, get an XU4. Currently on sale. There's also a RetroPi build for it that supports Dreamcast and Saturn and does a much better job with N64.
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Jan 8, 2019 03:53
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Can it play Radiant Silvergun?
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Jan 8, 2019 04:06
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Serenade posted:Can it play Radiant Silvergun? https://www.youtube.com/watch?v=CKNefvxoLGI It looks like some Saturn games are spotty.
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Jan 8, 2019 07:17
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Shawn posted:Sorry I'm late to the party. But this is what I came here to tell you, get an XU4. Currently on sale. There's also a RetroPi build for it that supports Dreamcast and Saturn and does a much better job with N64. Yeah the XU4 seems to be the thing to get. There are even sweet retro case available just like the pi. I think I'm going to go with this n64 case, as it adds 4 extra usb ports to the front  
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Jan 8, 2019 15:19
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A while ago I had found an old CCTV camera in a box of junk and was curious to see if it worked. As the output was NTSC via BNC conector, I just bought a cheap BNC-to-RCA adatper and a startech USB RCA input. To my surprise it the camera worked pretty well, even though the quality is what you'd expect an old sercutiy camera with a 1/3 in sensor. This lead me to want to be able to stream random crap but not be tied to my computer or the camera just being hooked up to a TV. So I bought a raspberry pi and a capture card specifically for the pi. There are some issues, but I wanted to post my findings as searching for how to properly configure everything lead to out of date information. Panasonic WV-CP244 Raspberry 3 Model A Lintest PiCapture SD1 The picapture card connects to the pi's camera port to take advantage of the native h264 encoding. This leads to an issue with NTSC input as the camera modes are made for the modern ATSC standard. So, the the image gets scaled horizontally and then cropped vertically. While NTSC doesn't exactly display the entire frame as some lines are used for additional information, such as closed captioning, it is still noticably cropped. On top of that the scaler tends to make it a little muddier as opposed to connecting it to my PC. When I first started attempting to stream video it was delayed and had tons of re-encoding issues leading to a terrible image. On top of that it was running the processor at 95%. I have to use raspivid to grab video from the camera port and force mode 6 (640x480) to correctly display the camera's output. Then pipe that to vlc, ffmpeg, etc. Originally, I was doing something like, raspivid -md 6 ... - o - | ffmpeg -i - ... -f flv "rtmp://" But this lead to terrible performance so I searched for alternatives. I tried v4l2 but I don't think there is an equivalent "mode 6" that raspivid uses; leading to an image of all noise. After wasting a lot of time I started to realize I was looking at post from as early as 2013. A lot of features such as v4l2 and ffmpeg with mmal_h264 support are already supplied in the latest raspbian stretch. Using, raspivid -md 6 ... -o - | ffmpeg -c:v mmal_h264 -i - ... -c:v copy -f flv "rtmp://" Its a lot faster, although still delayed, and it only puts the processor at 2% load. I do have an issue with time stamps as the h264 bit stream has no meta data and flv requires timestamps. This leads to some issues with streaming to twitch where the stream will get error code 5000. I've tried a couple things but haven't gotten past the issue.
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Jan 8, 2019 18:22
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hey so I'm just gonna barge in here, is there a pihole thread?
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Jan 13, 2019 03:03
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SniperWoreConverse posted:hey so I'm just gonna barge in here, is there a pihole thread? It’s here. You found it.
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Jan 13, 2019 03:04
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yeah I can't get it to work I should say I have an old netbook I put ubuntu server on, then I followed all the instructions to install pihole, and this is the result: only 2 clients use the pihole, localhost & the router obviously all adds still go thru to everyone else. I can access the dashboard via ip/admin, but not pi.hole/admin (probably because nothing is using the pihole as the dns) I can only access the dashboard on some browsers and not others for some reason so basically I got a fresh new install, ran the pihole install script as admin, then changed the router to make sure the computer running pihole always has the same IP and that this IP is the only DNS server. All the other attached devices act as if they have their old DNS info and I dunno exactly what to do to make it work for the whole network. e: this computer i'm on now has the router set up as it's dns server, the router should then kick all dns to the pihole, right? idgi SniperWoreConverse fucked around with this message at 18:35 on Jan 13, 2019 |
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Jan 13, 2019 18:32
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If all the attached computers are using their old dns info then you haven't got the router set up properly Unless you are using static ip addresses, the dhcp settings of the router should have the piholes ip address in the dns section
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Jan 13, 2019 22:28
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SniperWoreConverse posted:yeah I can't get it to work The problem is probably your router. I couldn't stop my d-link router from appending my ISP's dns servers to the list after pi-hole's IP that I manually specified. I ended up enabling the dhcp server in pi-hole's web interface.
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Jan 13, 2019 22:33
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SniperWoreConverse posted:yeah I can't get it to work check the dns on the clients, it should only have the netbook's ip. if its not, update the setting on the router, keep it as its only dns and reboot all your clients.
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Jan 13, 2019 22:37
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RoboBoogie posted:check the dns on the clients, it should only have the netbook's ip. if its not, update the setting on the router, keep it as its only dns and reboot all your clients. yeah, it's weird, I did this and the clients still use the router for DNS. The pihole is the only dns mentioned in the router and this doesn't seem to be getting to the clients. mewse posted:The problem is probably your router. this might be it, I dragged up some old post from somewhere that said this kind of router has issues if you try to put the DNS inside the local network instead of outside from the ISP or google or w/e. (unless you put in non-stock firmware)
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Jan 14, 2019 18:14
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Is there a thread about arduino and smaller electroic projects that don't use an entire Pi and operating system? I'm looking around IYG and SHSC but haven't seen one yet. I wanted to ask about bench power supplies and multimeters.
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Jan 14, 2019 19:05
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Salt Fish posted:Is there a thread about arduino and smaller electroic projects that don't use an entire Pi and operating system? I'm looking around IYG and SHSC but haven't seen one yet. I wanted to ask about bench power supplies and multimeters. I'd be interested in a general electronics thread. There's a 3D printer thread and a keyboard thread, both of which are areas I've got projects going, but afaik no general electronics
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Jan 14, 2019 19:11
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Theres the embedded thread in cavern of cobol for the programming side (though it's been a bit dead recently): https://forums.somethingawful.com/showthread.php?threadid=3500975 If its the electronic side theres the magic smoke thread in DIY which is quite active: https://forums.somethingawful.com/showthread.php?threadid=2734977
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Jan 14, 2019 19:14
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robostac posted:Theres the embedded thread in cavern of cobol for the programming side (though it's been a bit dead recently): That one's archived lol quote:If its the electronic side theres the magic smoke thread in DIY which is quite active: Nice!
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Jan 14, 2019 19:17
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There is also a separate Arduino-specific thread that's reasonably active https://forums.somethingawful.com/showthread.php?threadid=3505424 though I think nearly everyone in there also posts in Magic Blue Smoke so it doesn't really matter that much. The Arduino thread is probably better for beginner questions while the electronics one is a bit more advanced.
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Jan 14, 2019 19:46
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$52 B3+ kit I ordered one
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Jan 16, 2019 14:44
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Oh hell, I didn't even need another Pi and I grabbed that kit. Thanks? 
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