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I think I want to get a Pi for a bunch of little projects. I want to run a VPN server, a print server, and hook up a bunch of sensors, maybe to build a weather station. I was thinking of running Ubuntu Server LTS. Mostly I want to hook up lots of peripherals and tinker with things. My instinct would be to get a Pi 4 with 8 Gb of memory, but I want to keep energy use to a minimum, so if that much RAM would be overkill or an older model runs more efficiently, that would be good to know. Is there a big difference in thermals and energy usage, or just get whatever?
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Sep 22, 2020 08:01
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CarForumPoster posted:If you have a power budget because you need a battery then worry about power draw. Otherwise any passive air cooled computer isn’t going to draw much power. If it doesn’t need a fan to dissipate the heat, it’s not drawing much power in terms of your electricity bill. I’d like to get to a power budget, and one of the sensors I’d like to use or build is some kind of kill-a-watt type thing that would let me collect power usage. There are probably easier ways to do it, but it seems like a dumb, nerdy way to learn about it.
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Sep 22, 2020 10:54
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^ Yeah, no GUI, all shell all daypoeticoddity posted:There are in-line USB current meters that have little OLED or LED displays on them. Idk what this means but it sounds exactly the kind of thing I’m hoping to get out of this project
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Sep 22, 2020 22:11
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That’s cool as hell
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Sep 23, 2020 00:18
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Where’s the learning electronics thread?
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Oct 18, 2020 00:33
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ty
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Oct 18, 2020 01:04
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Random question, but is it safe to run a Pi exclusively off of an SD card? I remember something about memory cards having a finite number of write cycles but idk if that’s relevant or accurate
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Feb 12, 2021 00:54
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Cool thanks for the info. I’m using a cheap one I found in a drawer to get setup and mess around with. I’ll plan to set up something more robust down the line.
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Feb 12, 2021 01:26
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I’ve got my Pi up and running. I have some projects in mind and have found some components I want to use but I don’t have any electrical engineering or circuit design experience. I haven’t found many useful guides as the search results seem pretty worked over for SEO. For example there are plenty of charts for the GPIO pins, but I haven’t seen anything that really explains what the different types of pins are good for. I’d also like to know if there are any good starter kits for building things, like wires and resistors and capacitors (not that I know the difference between them). I’d like to avoid soldering, don’t mind taking up a little space, and don’t need make anything permanent right now. I mostly want to play with sensors. Also I’m looking at components on Adafruit and a lot of cool parts are out of stock. Do things tend to get replenished regularly or no?
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Feb 14, 2021 07:46
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Dominoes posted:Post specific questions here. I recommend you think of a project that is genuinely interesting to you, and learn what's required to make it happen. Awesome, thanks for the links. I want to start with a little irrigation system. I’ve got a hardware store nearby but they don’t have electronics. I think I need a “solenoid valve” and a “flow meter,” but I could see the system growing to multiple independent valves over time. There are a ton of guides online for that but I also have a few other ideas and so I am looking for examples of Pis being used for multiple sensors serving multiple purposes.
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Feb 14, 2021 09:15
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dupersaurus posted:My first raspi project has been a camera for my bird feeder. Someone I showed it to expressed interest in the code, so I cleaned it up and made it public, and I figured I'd share it here, too. that's cool as poo poo
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Mar 19, 2021 18:36
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covid, the economic depression, the cold war with china, etc etc
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Mar 22, 2021 06:10
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What’s the best way to set up a VPN on a Pi? I used to have a Mac Mini and the Apple-provided Server app made it super easy to set up an L2TP VPN, turn on, add a user, set the shared secret, done. Then on my phone, just add the server, username, password, and secret in the VPN settings. It looks like either OpenVPN or Wireguard, and both of them want to manage client connections via their own apps? I’m not opposed to new and better ways of doing things but it seems more convoluted and I can’t tell what these packages are doing under the GUIs. E: Just looking for something to use on public WiFi, don’t need to spoof IPs for streaming or anything.
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Jul 7, 2021 04:54
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Subjunctive posted:Tailscale. Two for wireguard and it looks like this is built on top of it. I’ll give it a shot.
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Jul 7, 2021 07:22
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Tailscale is cool but I need to run it as an exit node. I can't figure out how to make sudo tailscale up --advertise-exit-node run on boot. I think I'm supposed to do something with systemd but I'm not sure.
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Jul 8, 2021 03:11
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Tell me you live on the west coast without telling me you live on the west coast, I’ll go first. Does anyone have experience with air quality sensors? Would kind of like an outdoor sensor and an indoor sensor.
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Sep 3, 2021 21:36
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| # ¿ Apr 25, 2024 04:57 |
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Hadlock posted:I bought a $200 purple air unit after doing all the research and weighing "it just works" against "gently caress it, I'll just do it myself". The purple air unit is basically a $5 ESP8266 wired to a $150 air quality sensor, in a clear 3d printed case with a color led I figured this was likely the case
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Sep 4, 2021 17:58
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