According to their forum post, you can ask for an engineering sample before it goes on sale to the general public.

https://forum.radxa.com/t/one-step-forward/3923

So I'm building some monitoring for an indoor greenhouse. Growing Vegies indoors. I'm working on hooking up several sensors (i2C) to one raspberry pi per plant. I have purchased several from Atlas Scientific. My reason for not going higher numbers of plants per Raspberry Pi is due to I2C addressing. I have built a custom I2C bus with the appropriate I2C resistors etc. my next question is how far can a I2C device be from the master (Raspberry Pi). I thought maybe someone on here might know. Reading the specifications (I'm not an EE) I don't really understand.

Hello everybody!

This is my first post in this community.

This is a little sneak peek of a project I am working on called abacus.

It is based on the ESP8266 and is powered by the XOD programming language.

Note that this is the first prototype and its available on GitHub. (Please improve the design)

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https://preview.redd.it/c0vwzy1crhz31.png?width=973&format=png&auto=webp&s=d334970751fe3c393311c3a555ea3c4cc31fcf0c

Hi there,
at the moment I have a Toshiba Canvio Basic 3TB connected to my Speedport router using it as a media storage. Since the router had a firmware update, the hard drive won't get enough power and therefore shuts down after a few minutes.

Now I heard about building my own Server using a SBC like a Orange Pi to build my own server.

Here is what I would like to do:
- Use about 2.5TB as my media storage which I only need to connect to within my own Wifi at home. Here my Raspberry Pi with Retropi and Kodi needs to have access in order to play the media and I have to connect to it with my Ubuntu PC and the Macbook of my girlfriend in order to store the files there.
- Having about 100GB storage for my girlfriend to connect to from everywhere
- Having about 100GB storage for me to connect to from everywhere
- Having a calender / adressbook / to do list / notepad / organizer to sync with my Android phone and my Ubuntu PC
- Using it as a server for web development and website building (general learning of HTML, JS, CSS, PHP, SQL... using CMS like Drupal)
- Additional: Having an RSS reader which syncs with Android and Linux
- Additional: Being able to sync bookmarks between Android (Opera) and Linux (Chromium / Firefox)
- Additional ++: Being able to additionally connect my Toshiba Canvio Basic 1TB hard drive which only I can connect to within my Wifi and nobody else in my Wifi (using my Ubuntu PC)

Here are my hardware requests:
- Using a SBC which costs at least as possible and uses as much energy as possible in order to not pay much for electricity
- Additional: Dissamble my Canvio Basics external HDD and putting it in one case with the SBC
- Additional ++: Having a Case where I also can disassemble my second Canvio Basics HDD 2.5 HD and build it in.

Now my questions:
- Is it possible to realize all mentioned above? How much would that cost me?
- Which SBC would you suggest? What else do I need?
- Is a one case solution going to increase the price significantly? Should I therefore stick to leaving the hard drives external and connecting them via USB?
- Which software do I need on my PC/Smartphone to realize the things mentioned above?
- What do I have to do with the SBC/Server to realize that? Where can I inform myself about building a selfmade server?

Okay, so I am somewhat new to microcomputing. But it seems it would be really nice to have a laptop type device that consists of just a screen and keyboard with HDMI and/or DisplayPort and USB connection for the keyboard. (maybe power the whole thing from a USB-C power supply)

Something like this seems like it would be useful for microcomputers and single board computers alike.

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Does something like this exist?

I have a problem with my dogs jumping up onto and leaning against windows in my home. I had an idea of placing vibration sensors on the window, then generating a short blip of high frequency sound when the sensor detects the dogs on the window (~25,000 hertz - not so much to cause pain, but enough to cause discomfort). The problem is, I can't for the life of me find something that can generate these noises (to work with a pi). Any ideas out there?

Setting up a local environment for docker cluster development. Will be migrating to x86_64 hosts later so looking for x86_64 single-board solutions now as stand in. They can run headless but will need an RJ-45 ethernet connection.

Current contenders:

• LattePanda
• SolidPC Q4
• PC Engines APU2c2
• UP Board

Am I overlooking any issues with those? Anything other boards I should add to the list? Any horror-story experiences with debian/ubuntu on these? Other thoughts/advice?