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by jardino
Fri Jan 04, 2019 1:45 pm
Forum: General discussion
Topic: My Sons first Pi
Replies: 10
Views: 312

Re: My Sons first Pi

Heydt said: "I'm afraid that I don't find the lack of help from the school IT instructor very surprising. Like any reasonably technical field, you get a lot of people who know just enough about it to get hired, but who lack in-depth knowledge. You son is likely to wind up teaching the teacher." Ther...
by jardino
Fri Jan 04, 2019 12:49 pm
Forum: General discussion
Topic: My Sons first Pi
Replies: 10
Views: 312

Re: My Sons first Pi

To go through the Scratch route to learning programming, I've recommended a few books in another post:

viewtopic.php?f=63&t=227282&p=1394318#p1394318 .

Alan.
by jardino
Fri Jan 04, 2019 12:45 pm
Forum: General discussion
Topic: My Sons first Pi
Replies: 10
Views: 312

Re: My Sons first Pi

You could try a Pi-Top from ModMyPi. This is a fully integrated device which just needs the installation of an RPi to get started. No trailing cables, etc, except for the power lead. My grand-children got one from Santa (!) and seem to like it, although it's not been heavily used so far. One advanta...
by jardino
Mon Dec 24, 2018 1:30 pm
Forum: Off topic discussion
Topic: Cluster hat
Replies: 1
Views: 601

Re: Cluster hat

ModMyPi have such a case - but it's for the V2 Cluster Hat. You need to do a bit of hacking to use it with the V1, since the power USB socket has moved from one side to another between versions.
Alan.
by jardino
Tue Nov 20, 2018 4:03 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 1254
Views: 38810

Re: Why Avoid BASIC on RPi?

Touching on Heater's post: I was once hired to prise a Dutch company off their use of BASIC. They had been using it a lot for their commercial systems, then won a contract for a large real-time project and were totally floundering trying to get BASIC to handle multiple interrupts from disparate sens...
by jardino
Tue Nov 20, 2018 12:18 pm
Forum: General discussion
Topic: Getting Started with the kids.
Replies: 2
Views: 256

Re: Getting Started with the kids.

I have been teaching my young grandchildren Scratch on an RPi for a few weeks and found the following books useful. First, the MagPi Essentials book "Learn to Code with Scratch". Elementary, which is what we need. Being about Scratch specifically on the RPi, it introduces the GPIO. Secondly, "Scratc...
by jardino
Fri Nov 16, 2018 12:19 pm
Forum: General discussion
Topic: Looking for small mechanical wired keyboard...
Replies: 8
Views: 289

Re: Looking for small mechanical wired keyboard...

If the numeric keys on the keyboard are not required, then the search for "small" may have more results.
Alan.
by jardino
Sun Nov 11, 2018 12:09 pm
Forum: Off topic discussion
Topic: The future of computer mice
Replies: 26
Views: 3941

Re: The future of computer mice

Thanks for the feedback and the ammunition, everyone. My case now rests. I seem to have sparked an interesting discussion! The only times I have used a touch-pad in preference to a mouse was when on a plane sitting beside a generously-sized fellow passenger, when I had no elbow-room. Anyway, I've ju...
by jardino
Fri Nov 09, 2018 11:59 am
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 397
Views: 119114

Re: What was your first computer?

Sorry, my last message was unclear.
It was meant for RomoBoom and should have read,
"What has your experience with the PiTop been, please?

Alan.
by jardino
Fri Nov 09, 2018 11:52 am
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 397
Views: 119114

Re: What was your first computer?

What has your experience with it, please.
Alan.
by jardino
Wed Nov 07, 2018 4:05 pm
Forum: Off topic discussion
Topic: The future of computer mice
Replies: 26
Views: 3941

The future of computer mice

Would anyone around here care to express an opinion on the future of computer mice versus touch pads, touch screens and so on? The reason I ask is that I am teaching my grand-children Scratch on my RPi and fancy getting them an integrated system such as the Pi-Top from ModMyPi. However, my curmudgeo...
by jardino
Wed Oct 17, 2018 10:33 am
Forum: Scratch
Topic: Beginning with scratch
Replies: 4
Views: 5258

Re: Beginning with scratch

I'm in a similar situation to the OP, in that I'm starting to teach my 7-year-old granddaughter Scratch. (They're teaching Scratch in her school, but she was struggling with sprite selection and manipulation - probably because her teacher doesn't have enough time for one-to-help help.) We've got ove...
by jardino
Fri Sep 14, 2018 7:26 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 397
Views: 119114

Re: What was your first computer?

He-he. I worked on Honeywell's H-200, which was a direct competitor to the IBM 1401 (but better!) The typical memory size was 4k to 16k. When a customer needed 24k, we had to engage a welder to extend the cabinet that held the memory modules. I'm glad that nowadays I can plug a 16 G-byte micro-SD ca...
by jardino
Fri Sep 14, 2018 12:08 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 397
Views: 119114

Re: What was your first computer?

Not that worked on this machine - but I thought this item was interesting.

I thought that my washing-machine-sized disc drives were large, but have a look at this picture from1956 of an IBM computer.
These two drives (in the foreground) could store as much as 15 Mbytes of data each!
Alan.
by jardino
Fri Sep 07, 2018 12:55 pm
Forum: General discussion
Topic: Raspberry Pi is a waste of time (and money).
Replies: 115
Views: 6838

Re: Raspberry Pi is a waste of time (and money).

As a one-time computer consultant and technical writer (for clients - not for publication) there are many things I learned. Among them are: 1) Regardless of your audience, always define abbreviations the first time used (e.g. means "for example"). This is something that posters herein often fail to ...
by jardino
Thu Sep 06, 2018 3:38 pm
Forum: Wolfram Language
Topic: Parallel Processing in Wolfram and Mathematica
Replies: 1
Views: 4323

Re: Parallel Processing in Wolfram and Mathematica

Sorted, I think.

After installing Stretch on a new RPi 3B I did the usual "apt-get update".
I noticed that the on-screen log devoted a lot of time to upgrading Wolfram.
And so, afterwards, I found that I now have 4 processors!

Now back to my ventures in parallel processing in Wolfram...

Alan.
by jardino
Sun Aug 26, 2018 8:20 pm
Forum: HATs and other add-ons
Topic: PoEHAT - Ethernet cablie current capabilities
Replies: 2
Views: 1563

PoEHAT - Ethernet cablie current capabilities

Has anybody looked into the current-carrying capabilities of commonly available Ethernet cables? I'm about to buy a PoE HAT - for no particular purpose - I'm just a tinkerer - and was wondering about this problem. For instance, my little local network uses (but not exclusively) these handy Ethernet ...
by jardino
Sat Jul 21, 2018 8:13 pm
Forum: Off topic discussion
Topic: Python and "The Economist"
Replies: 4
Views: 839

Re: Python and "The Economist"

You're quicker than me!
Alan.
by jardino
Sat Jul 21, 2018 8:10 pm
Forum: Off topic discussion
Topic: Python and "The Economist"
Replies: 4
Views: 839

Re: Python and "The Economist"

Sorry - I mis-typed the link.

Here it is:

https://www.economist.com/science-and-t ... w-audience

Alan.
by jardino
Sat Jul 21, 2018 8:00 pm
Forum: Off topic discussion
Topic: Python and "The Economist"
Replies: 4
Views: 839

Python and "The Economist"

I've just read an interesting (and amusing) article about Python in "The Economist" newspaper at: https://www.economist.com/science-and-technology/2018/07/21/python-has-brought-computer-programming-to-a-vast-new-audienc e I agree with almost all of it, except the last paragraph in the section entitl...
by jardino
Tue May 22, 2018 3:07 pm
Forum: General discussion
Topic: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?
Replies: 7
Views: 779

Re: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?

Takes 13 m 38 s on my Pi 3b+ - including digit display time. Program reports "Total time" of 458 s before digit display starts.

Alan.
by jardino
Tue May 22, 2018 11:16 am
Forum: Wolfram Language
Topic: Parallel Processing in Wolfram and Mathematica
Replies: 1
Views: 4323

Parallel Processing in Wolfram and Mathematica

Parallel Processing has been available in Wolfram and Mathematica since Release 7. Recently I have happily been experimenting (well, messing about) with Parallel processing on an RPI with a silghtly old version of Raspian (I forget which). Using the $ProcessorCount command I get the expected result ...
by jardino
Thu Apr 19, 2018 3:42 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 5412

Re: 3B+ BLAS performance etc

Sorry, this system won't allow me to attach my simple spreadsheet file. I'll need to find a workaround.
In the meantime, here is the graph with the Pi zero results deleted, to allow better resolution of the other two devices.

Alan.
Benchmarks2.jpg
Benchmarks2.jpg (45.36 KiB) Viewed 5252 times
by jardino
Thu Apr 19, 2018 8:20 am
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 5412

Re: 3B+ BLAS performance etc

The raw data is in a spreadsheet. I'll get it to you later.
Alan.
by jardino
Wed Apr 18, 2018 6:07 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 5412

Re: 3B+ BLAS performance etc

I used a good official power supply for the tests, but did not check the machine's temperature.
Alan.

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