Raspberry Pi Forums

scruss

Heater wrote:Yes, yes. That PowerPC.

A drop in the ocean of the global micro-processor market.

A lot of network hardware uses QorIQ CPUs, which are multi-core PPCs

scruss

An rpi-update fixed it, btw.

scruss

Thanks - sounds like something is messed up in /boot, then.

scruss

I've got a B+ here, upgraded to Raspbian Jessie, set to login then go straight to X. Setup has worked fine before. After a system update ( sudo apt-get update; sudo apt-get -y dist-upgrade )tonight and a reboot, the display is stuck in a loop: display blanks X pointer flashes These messages are prin...

scruss

DougieLawson wrote:I suspect SonicPi could be encouraged to produce some custard farting when driven by a specialist.

I must be quite the specialist, then. Every time I'm faced with a generational music program or an analogue synth, on the very first try I always get a squelchy, farty sound.

scruss

Not just for kids — certain VW cars have a “Soundaktor”, a speaker/amplifier behind the engine that makes fake ‘vroom vroom’ noises. No, really. I'm surprised no-one has made such a gizmo for Tesla drivers, as if you're going to drop that much $$$, you'd think a certain %age of the drivers would wan...

scruss

Anyone any clues when/if the Model A will be available to buy again ? I'd mail you mine from Canada, but I imagine the postage would cost more than it's worth. I spent a lot of time trying to find a use for it, but the single USB port meant it always needed a giant octopus of a USB hub nearby. What...

scruss

First, excuse me if i'm pedantic, but IMHO this is important, there are no parts specifically designed for Arduino. Not even this ? Is this a five-minute argument, or the full half hour? ☺ An arduino is/contains a simple microcontroller running on 5V. There are a bunch of 3.3V-capable ones in the o...

scruss

I tried SQLite when I tried OwnCloud on the Pi. Did not have a good experience and found MySQL was better. Maybe a default SQLite needed some tweaks for OwnCloud but life is too short. I just don't like adding extra layers of software when not needed as always adds inefficiencies in my experience t...

scruss

I was talking about the A701 bit from near Moffat. I know the A74/M74 well, and also a whole bunch of those wee roads in Southern Scotland. If you see a wind turbine there, there's a good chance I had something to do with the site survey.

scruss

Nice; and you certainly chose a pretty (if slow) route to come into Scotland.

I recently discovered gpx2spatialite, which is a rather nice way of building a spatial database from GPX tracks. With care, it could run at a reasonable speed on a Raspberry Pi.

scruss

KeithSloan wrote:SQL is not fast on the Pi
It add complications
makes backup and recovery more complicated

SQLite can be screamingly fast on a Raspberry Pi. The database is just a binary file which is easily backed up. No server required.

If you're looking for small, there's always TiddlyWiki …

scruss

eraldino wrote:I am running on Oracle Java but still its too damn slow to run a rotating matrix.

That's doing quite a lot of maths. Don't forget that the Raspberry Pi has roughly the same power as a 2009 iPhone 3GS …

Couldn't get it to run under Processing.js, though I didn't try very hard.

scruss

You can't, sorry. Processing requires X11 because it either runs under: Java — in the case of “classic” Processing A modern web browser - for Processing.js Make sure you're running Oracle Java for the fastest Classic Processing. Haven't tried the new browser with Processing.js. cheers, Stewart

scruss

Thanks scruss - I did a cursory read of your links and sublinks. So I understand (please correct me if I am wrong), this is what I think I read: 1. The Firecracker is the interface between the Raspberry Pi and the powerline modem. No; it's a simple 9-pin serial passthrough that transmits X10 RF. It...

scruss

Assuming we use the transceiver / modem for X10, how can she provide commands via the Raspberry Pi? I've been using a very simple USB→Serial converter, talking through a X10 FireCracker CM17A RF (write-only) interface to a CM11 powerline interface. I control appliances (lights, mostly) using heyu. ...

scruss

… newer Arduinos use a different interface, so appear as /dev/ttyACM0 It's getting hard to tell what's an Arduino these days; even the official current ones stick to any particular standard. If the board uses a dedicated serial chip (the FT232, like the older Duemilanove or SparkFun's RedBoard, or ...

scruss

Under Linux, you have to mount/dismount USB drives, unless your system is set up to do automounting (which I don't think Raspbian does). Here's a thread on the subject, which might prove useful: How do you mount a USB Drive? Personally, I'd have your script: read the scale, temperature sensor, and s...

scruss

What is the problem here? There really isn't one. As long as you're not running out of physical RAM (and here, you're not) Linux will use as much memory as it reasonably can to cache files and system information. Once memory gets low, the system will automatically purge stuff that's not needed, and...

scruss

Yes, you can. Things might get slow if you are doing multiple updates on both at once, but the system should be able to manage them.

scruss

It would be nice to see this outside the locked-down app stores, via something like Exact Editions.

scruss

Where in Canada can I find Pi store? Depends where you are. Lots of mail order (like Newark ), and in person in places like Sayal (a bit expensive) or Creatron (two locations in Toronto; the owner now works out of the store on Sheppard Ave, and is most helpful in picking out the stuff you need). Yo...

scruss

After losing an entire wind turbine controller (~$120,000) to mice, I don't think you could pay me enough to develop hamster-proof sensors …

scruss

How many different interface types are there? Apart from the digital ones mentioned here, the ones I've experienced in some years of environmental logging: linear analogue — 0-1 V or 0-5 V is full range. linear potentiometer — 0 to 1kΩ is 2–358° for many wind vanes. You're going to get wind directi...

scruss

I've been looking at some sensors, but I want decent ones, with pretty good ranges. Recommendations? While Campbell Scientific or Vaisala will be stupidly above your price range, they are what the professionals use. Look at their data sheets, find cheaper sensors with similar output types, then see...

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