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by scruss
Tue Sep 24, 2019 6:24 pm
Forum: General programming discussion
Topic: Liberation through Computer Literacy
Replies: 1166
Views: 56186

Re: Liberation through Computer Literacy

…. As a result, the slug bootloader is almost finished. Pfft. Call that sluggish? 'Cos it's a positive racing snail — _@/ — compared to what I'm building: a computer with a clock that can be slowed down to 3 Hz . Yup, I didn't miss a prefix out: that's three clock pulses per second. You can slow it...
by scruss
Tue Sep 24, 2019 12:17 pm
Forum: Advanced users
Topic: Brother Laser Printer not in CUPS model list
Replies: 2
Views: 117

Re: Brother Laser Printer not in CUPS model list

It supports IPP (check the Protocol(IPv4) section), so installing this and going through the desktop Preferences should get you going: sudo apt install cups cups-ipp-utils system-config-printer As of Buster, just installing system-config-printer won't pull in enough of the CUPS printing system to wo...
by scruss
Tue Sep 24, 2019 12:11 pm
Forum: Other programming languages
Topic: Perl module Rpi::PIGPIO?
Replies: 2
Views: 660

Re: Perl module Rpi::PIGPIO?

I'm still wary of installing CPAN packages on a Debian system after one blew out the apt system on a machine I used 15 years ago. I prefer to install packages on top of a local perlbrew installation so that I know that the system Perl is untouched.
by scruss
Tue Sep 24, 2019 11:12 am
Forum: Other projects
Topic: Raspberry pi 3B+ board DXF file
Replies: 5
Views: 266

Re: Raspberry pi 3B+ board DXF file

It won't be quite as precise as one exported directly from the PCB software would be, but it is possible to create a DXF from a PDF using inkscape. The following in the procedure I used when I last needed to do this. I think they might be looking for 3D DXF if they're designing a built-up case. I d...
by scruss
Tue Sep 24, 2019 2:28 am
Forum: General discussion
Topic: Raspberry Pi 4 BCM2711B0 vs Intel Atom x5-z8350
Replies: 25
Views: 1504

Re: Raspberry Pi 4 BCM2711B0 vs Intel Atom x5-z8350

Moonmarch wrote:
Tue Sep 24, 2019 1:02 am
Both computers are low power usage computers I will tell you right now with the Intel Atom computer you can install full Windows 10 on the computer …
I'd consider Windows 10 to be a severe drawback to any computer. You have to pay me to use it.
by scruss
Sat Sep 21, 2019 1:13 am
Forum: Beginners
Topic: What RAM to buy?
Replies: 4
Views: 240

Re: What RAM to buy?

Buy the 4GB one if you can. It feels like a real desktop.
by scruss
Mon Sep 16, 2019 9:17 pm
Forum: General discussion
Topic: Looking for specific software
Replies: 5
Views: 406

Re: Looking for specific software

I've used many different PDF viewers, and I don't know of any that run on the Raspberry Pi that allow anything other than plain-text annotations.
by scruss
Sat Sep 14, 2019 3:59 pm
Forum: Beginners
Topic: Uninstall older versions of packages that still exist after newer versions have been installed?
Replies: 6
Views: 378

Re: Uninstall older versions of packages that still exist after newer versions have been installed?

I will definitely remove the 10.1 versions of mariadb, I've decided against apt judgement :D Well, good luck! Upgrading from one Raspbian release to another can leave some files around. If you wanted it absolutely clean, install from a new image (which is what the Foundation recommends anyway, espe...
by scruss
Sat Sep 14, 2019 1:36 pm
Forum: Beginners
Topic: Uninstall older versions of packages that still exist after newer versions have been installed?
Replies: 6
Views: 378

Re: Uninstall older versions of packages that still exist after newer versions have been installed?

You've probably got a lot of downloaded deb files in your cache. You can remove them with: sudo apt clean To remove packages that the system doesn't need any more: sudo apt --purge autoremove Manually removing packages you don't think you need? Probably not a good idea. The packages that remain afte...
by scruss
Fri Sep 13, 2019 1:18 pm
Forum: Beginners
Topic: Arduino IDE on Raspberry Pi Zero W
Replies: 40
Views: 1057

Re: Arduino IDE on Raspberry Pi Zero W

Both are affected.
by scruss
Wed Sep 11, 2019 9:54 pm
Forum: Arch
Topic: Tutorial for updating R-Pi firmware in ARCH LINUX [obsolete]
Replies: 14
Views: 38341

Re: Tutorial for updating R-Pi firmware in ARCH LINUX

These instructions are more than five years out of date. They won't work with any of the new Raspberry Pis.
by scruss
Tue Sep 10, 2019 8:44 pm
Forum: Beginners
Topic: Arduino IDE on Raspberry Pi Zero W
Replies: 40
Views: 1057

Re: Arduino IDE on Raspberry Pi Zero W

There's the reboot-the-Zero-when-unplugging-USB issue that there's not much you can do about Can the developers of Raspbian fix it, or even they can't? No it's a hardware problem — it affected the early Raspberry Pi Model 1s too, fixed in the 1B+. All my Zeroes reset when hot-plugging USB, and I'm ...
by scruss
Tue Sep 10, 2019 2:03 pm
Forum: Beginners
Topic: Arduino IDE on Raspberry Pi Zero W
Replies: 40
Views: 1057

Re: Arduino IDE on Raspberry Pi Zero W

It seems it is possible to use the compiler from the command line without needing that - It absolutely can be. If you really wanted to, you could just install avrdude and gcc-avr (as long as you were sticking with old-style AVR-based Arduino boards). The solution I listed, though somewhat slow to s...
by scruss
Tue Sep 10, 2019 1:44 pm
Forum: Beginners
Topic: Creatief cron job
Replies: 5
Views: 104

Re: Creatief cron job

A crontab line starting with 5 * * * * runs five minutes after the hour (so 00:05, 01:05, 02:05, …). If you want it to be spun down every five minutes, use: */5 * * * * There may be a way of telling the drive (using sdparm/hdparm) to spin down after X minutes idle rather than forcing it off every fi...
by scruss
Tue Sep 10, 2019 2:13 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: workspaces, more than 1.
Replies: 1
Views: 104

Re: workspaces, more than 1.

Yes: right click in the menu bar, “Add/Remove panel items”, in Panel Preferences click “Add”, then select “Desktop Pager” and “Add”. This will give you a rather useless one-page pager, so right click on that and choose “Desktop Pager Settings”. You can choose and name as many as you want in the Desk...
by scruss
Mon Sep 09, 2019 7:04 pm
Forum: Beginners
Topic: Arduino IDE on Raspberry Pi Zero W
Replies: 40
Views: 1057

Re: Arduino IDE on Raspberry Pi Zero W

If you want a lighter solution, there's the kinda bleeding-edge arduino-cli system: https://github.com/arduino/arduino-cli It seems a little rough and takes a while to set up, but each individual build shouldn't take too long once you've got board and core supported. A couple of notes from installin...
by scruss
Mon Sep 09, 2019 3:50 pm
Forum: Troubleshooting
Topic: Ye Old unknown-block(179,2)
Replies: 16
Views: 410

Re: Ye Old unknown-block(179,2)

Similar to H2testw, there's f3, which runs on a Raspberry Pi: sudo apt install f3 Its f3write/f3read command pair fill an SD with unpredictable data, then read it back. If the writes and reads don't match, you have a bad card. Note that with Amazon purchases, you've got no idea what you're going to ...
by scruss
Mon Sep 09, 2019 3:43 pm
Forum: Beginners
Topic: Arduino IDE on Raspberry Pi Zero W
Replies: 40
Views: 1057

Re: Arduino IDE on Raspberry Pi Zero W

Do not tell me what to do, you are not a moderator ! Yes, but please don't jump in with a first recommending the Raspbian arduino package. It's many years out of date and almost useless. I know you're just trying to help, but if you were actively developing on Arduino you wouldn't wish that Raspbia...
by scruss
Sat Sep 07, 2019 9:55 pm
Forum: Advanced users
Topic: Trigger script on sunset and -rise
Replies: 18
Views: 1045

Re: Trigger script on sunset and -rise

In V0.8 a positive offset is shifts the time towards noon, is the opposite in V0.1? So what I tried to do is have it wait until 17:05 (20:21-03:16 ) hence a delay of only two minutes from 17:03 (it was 17:01 when I edited the crontab). A positive offset just adds a delay on top of the trigger time,...
by scruss
Sat Sep 07, 2019 7:33 pm
Forum: Advanced users
Topic: Trigger script on sunset and -rise
Replies: 18
Views: 1045

Re: Trigger script on sunset and -rise

Thanks for your quick reply. No problems. I wonder what happened to it, though? Or is it just me who can't see my post with the link to http://risacher.org/sunwait/sunwait-20041208.tar.gz ? It has less options but I thought I have the syntax right when I for example put this in cron: 03 17 * * * /u...
by scruss
Sat Sep 07, 2019 6:51 pm
Forum: Troubleshooting
Topic: Help with 4-20mA and Raspberry Pi 3B+
Replies: 6
Views: 310

Re: Help with 4-20mA and Raspberry Pi 3B+

… After doing this, I was able to read 0V at 4mA and 3.3V at 20mA I know you're going for maximum ADC range here, but by having 0 V at 4 mA you're getting rid of current loop's one great advantage¹: if it ever outputs less than 4 mA, you know your sensor's broken. --- ¹: and 3–15 psi pneumatic cont...
by scruss
Sat Sep 07, 2019 1:38 pm
Forum: Off topic discussion
Topic: word games -- how many words from the letters.....
Replies: 8
Views: 2705

Re: word games -- how many words from the letters.....

Otherwise the answer is 841: That's an answer. The wbritish-insane list contains errors and many entries that can't reasonably be called words. And, being British, it won't even know how to spell "yogourt", which is Canada's delightfully unique way of spelling it. Mercifully, there's no yog[h|o]urt...
by scruss
Fri Sep 06, 2019 6:38 pm
Forum: Troubleshooting
Topic: Pi 4, Raspbian Buster and Wine 4.0
Replies: 8
Views: 1727

Re: Pi 4, Raspbian Buster and Wine 4.0

… not worth the hassle at this point because this version of wine doesn't even target Windows 10, so then what could it possibly be used for? Wine lets me run the control software for a very expensive piece of machine shop hardware. This software was never developed past 32-bit Windows XP. For this...
by scruss
Thu Sep 05, 2019 11:08 pm
Forum: General discussion
Topic: Lighter Open Office for Zero?
Replies: 13
Views: 533

Re: Lighter Open Office for Zero?

If you need to be able to read most DOCX or XLSX files, you need an absolutely colossal program to handle all the edge cases. To be honest, LibreOffice is fairly lightweight for this sort of application.
by scruss
Thu Sep 05, 2019 6:36 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Serial Console
Replies: 7
Views: 259

Re: Serial Console

Looks like there isn't a kernel driver for this Cypress USB-Serial device, not at least for Raspberry Pi. There's a small change that the serial port is at /dev/ttyACM0 (check for ttyACM in dmesg output) but you may be out of luck with this one. Though searching for the USB ID string in the forum tu...

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