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by CarlRJ
Fri Jul 07, 2017 7:36 pm
Forum: General discussion
Topic: What use is an R Pi Zero to me?
Replies: 15
Views: 1969

Re: What use is an R Pi Zero to me?

That's some dedication to knowing the weather. Eh, it started with one Pi and a dislike of how the commercially available weather stations displayed things. And once the first bit was up and running, there were many many cycles of "ooh, it'd be even better if I added (X or Y or Z)". The Pi is all a...
by CarlRJ
Fri Jul 07, 2017 5:59 pm
Forum: General discussion
Topic: What use is an R Pi Zero to me?
Replies: 15
Views: 1969

Re: What use is an R Pi Zero?

I like the 'interfaces' v 'brains' distinction for Arduino and Pi, very appropriate. ... I'm beginning to think the Zero might be a good substitute for the touch-screen controlled Arduino that programs the loom, that one is a bit clunky in it's present form. A Pi could be quite good for this latter...
by CarlRJ
Thu Jul 06, 2017 6:31 pm
Forum: General discussion
Topic: 3.5 gpio screen not working
Replies: 5
Views: 1028

Re: 3.5 gpio screen not working

Just connect that thing there to that other thing, it's quite obvious, really. Or, if you want an explanation that makes sense and has meaningful context, you're going to have to provide the folks here on the forum with... meaningful context (none of us are watching over your shoulder). What exactly...
by CarlRJ
Tue Jul 04, 2017 5:03 pm
Forum: General discussion
Topic: RPi 3 Model B verification for authencity
Replies: 3
Views: 811

Re: RPi 3 Model B verification for authencity

While it's possible that someone could sell you a circuit board designed to look like a Pi, complete with fake markings (I've not heard of such a thing, but I suppose some enterprising crook might try), if it boots up on a microSD card (that you bring) loaded with Raspbian (the mostly widely used/su...
by CarlRJ
Fri Jun 30, 2017 12:19 am
Forum: General discussion
Topic: How to convert 3.7v battery to 5v?
Replies: 4
Views: 1620

Re: How to convert 3.7v battery to 5v?

The Lifeguard board looks possibly interesting. The website is awfully thin on technical specs. Another possibility to consider is the MoPower board. It's designed to be used as a UPS, and talks more of NiMH batteries than Lithium ones, but the page talks of it running Pi's for 6 hours from batterie...
by CarlRJ
Thu Jun 29, 2017 6:59 pm
Forum: General discussion
Topic: Pi Zero now available in multiples !
Replies: 15
Views: 3332

Re: Pi Zero now available in multiples !

Some fun with numbers... (Doing the math for delivery to the USA, because first, that's where I am, and second, they have free shipping in the UK, so this is moot there. Also, once I ran through their shipping calculator and indicated I was in the USA, and then chose "$" for currency up at the top o...
by CarlRJ
Thu Jun 29, 2017 4:40 pm
Forum: General discussion
Topic: Pi Zero now available in multiples !
Replies: 15
Views: 3332

Re: Pi Zero now available in multiples !

So, working from the above... Theory #1: a major factor in Pi Zeros having been so scarce is that at the $5 price point, there's vanishingly little money to be made from them by the traditional commercial producers. Adding the header is a useful addition, and provides a reason to release a variant a...
by CarlRJ
Wed Jun 28, 2017 8:45 pm
Forum: General discussion
Topic: Raspberry Pi power cut torture test using a MoPower UPS
Replies: 30
Views: 5740

Re: Raspberry Pi power cut torture test using a MoPower UPS

Has anyone seen anything official on any modifications made to the Pi for SD card reliability.. firmware, hardware, software, anything? Maybe in some release notes or any postings? My vague recollection is that diminishing reports of SD card corruption coincided somewhat with changes to Raspbian or...
by CarlRJ
Wed Jun 28, 2017 8:29 pm
Forum: General discussion
Topic: How to convert 3.7v battery to 5v?
Replies: 4
Views: 1620

Re: How to convert 3.7v battery to 5v?

It would be worth taking a look at Adafruit's PowerBoost 1000 . It doesn't put out 2.4A, but they do run a lot of Raspberry Pi projects with them. The Pi 3 itself doesn't need 2.5A, that's mostly if there are USB peripherals plugged in that are drawing a lot of power (what the Pi does need is clean ...
by CarlRJ
Mon Jun 26, 2017 11:28 pm
Forum: General discussion
Topic: Protecting Proprietary software from being copied.
Replies: 47
Views: 7222

Re: Protecting Proprietary software from being copied.

Please don't take this the wrong way, but it's not necessary to reply to every single post, quoting the entire post, just to say thank you. It doubles the amount of words in the thread without doubling the amount of unique content. We get that you're appreciative, and it's nice to hear that (most of...
by CarlRJ
Sun Jun 25, 2017 9:01 pm
Forum: General discussion
Topic: Protecting Proprietary software from being copied.
Replies: 47
Views: 7222

Re: Protecting Proprietary software from being copied.

Aside from echoing the "maybe don't bother" suggestion... If you have a long-running application and an always on network connection, have your application download some vital-to-proper-execution bit of data from your server when it starts up, and keep it only in memory. Request that data over an ht...
by CarlRJ
Sat Jun 03, 2017 9:24 pm
Forum: General discussion
Topic: Raspbian Stretch Release Date?
Replies: 33
Views: 16505

Re: Raspbian Stretch Release Date?

A great many people do care if an update breaks their Pi. I think one of the problems is that Pi's are used in many different ways by many different people. Some are long-running servers, some are experimental bits on a workbench, some are dedicated appliances of a sort (media servers and such), st...
by CarlRJ
Fri Jun 02, 2017 8:04 pm
Forum: General discussion
Topic: owning /usr/local/bin
Replies: 19
Views: 3056

Re: owning /usr/local/bin

If you want a bin directory that is easily writable/usable by user pi, do mkdir ~pi/bin to create one under your home directory. /usr/local/bin isn't meant to be writable by everyone. It also sounds like you've mucked up the ownership or permissions of sudo (posting the output of ls -l /usr/bin/sudo...
by CarlRJ
Sun May 28, 2017 9:04 pm
Forum: General discussion
Topic: Setting up a Pi 3 for the long haul?
Replies: 44
Views: 6984

Re: Setting up a Pi 3 for the long haul?

:D :D love the suggestions. I don't know if I am trolling I probably am.You are basically saying that you should buy a really really good sd card that costs more than the pi rather than say that the sd card is the implicit weakness of a pi. Yes, you have been trolling this thread. Starting off by i...
by CarlRJ
Sun May 28, 2017 2:01 am
Forum: Off topic discussion
Topic: Raspberry Pi 3 Model B into PC?
Replies: 7
Views: 2459

Re: Raspberry Pi 3 Model B into PC?

Per the Blizzard website , Overwatch requires Microsoft Windows 7 or above, running on an Intel Core i3 or AMD Phenom X3 CPU (both x86-based) with 4 GB of RAM, and a video card with a pretty hefty and modern GPU. The Raspberry Pi 3B runs Linux, not Windows, on an ARM CPU with 1 GB of RAM, and has a...
by CarlRJ
Sun May 21, 2017 10:49 pm
Forum: General discussion
Topic: Where to buy Zero W in USA?
Replies: 17
Views: 3953

Re: Where to buy Zero W in USA?

Pimoroni: £8.00 Pi Zero W + £5.50 shipping = £13.50 ThePiHut: £9.60 Pi Zero W + £5.00 shipping = £14.60 Very reasonable prices - obviously you get benefit of no VAT :) We get charged £2-50 (+20% VAT) shipping so your £5 shipping is a bargain :) Indeed. I suspect the difference in base price between...
by CarlRJ
Sun May 21, 2017 10:39 pm
Forum: General discussion
Topic: Fit a computer to a mobility scooter?
Replies: 4
Views: 949

Re: Fit a computer to a mobility scooter?

The one real "gotcha" to watch out for is, as a Linux-based computer, the Raspberry Pi likes to be shut down in an orderly manner before removing power. If you put it in a situation where you routinely shut it off by the approximate equivalent of yanking the power cord out of the wall, it won't be l...
by CarlRJ
Sun May 21, 2017 1:04 pm
Forum: General discussion
Topic: Where to buy Zero W in USA?
Replies: 17
Views: 3953

Re: Where to buy Zero W in USA?

who shipped Pi Zero W's to California, delivered in about a week, for £13.50 ($17.41) and £14.60 ($18.83) respectively. Is that the shipping costs on top of the $10 for the Pi or the total cost? That is the cost of the Pi plus the cost of shipping: the total cost from the bottom line of those two o...
by CarlRJ
Sun May 21, 2017 2:54 am
Forum: General discussion
Topic: Where to buy Zero W in USA?
Replies: 17
Views: 3953

Re: Where to buy Zero W in USA?

Amazon has them all the time! https://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=pi+zero Yes, at prices from $26 to $40, once shipping is factored in (the most amusing being "$10" plus $17 shipping ). As stated above, the ones on Amazon are almost entirely from people b...
by CarlRJ
Sat May 20, 2017 9:45 pm
Forum: General discussion
Topic: Where to buy Zero W in USA?
Replies: 17
Views: 3953

Re: Where to buy Zero W in USA?

FWIW, ordering from the UK vendors is about as fast and cheap as anywhere (aside from MicroCenter, if they happen to have built a store near you). I've had good luck with Pimoroni and ThePiHut, who shipped Pi Zero W's to California, delivered in about a week, for £13.50 ($17.41) and £14.60 ($18.83) ...
by CarlRJ
Fri May 19, 2017 8:54 pm
Forum: General discussion
Topic: Wireless battery sensors
Replies: 1
Views: 894

Re: Wireless battery sensors

The commonly available remote temperature/humidity sensors sold by Oregon Scientific and others to supply outside weather readings to their indoor weather stations all tend to broadcast their readings using a 433 MHz transmitter, sent with a protocol that was reverse-engineered long ago. They typica...
by CarlRJ
Thu May 18, 2017 6:35 pm
Forum: General discussion
Topic: Why the Raspberry Pi 3 Model B does not use upstream Linux?
Replies: 19
Views: 3781

Re: Why the Raspberry Pi 3 Model B does not use upstream Lin

As you know, there is a Raspberry Pi specific Linux kernel at https://github.com/raspberrypi/linux . It means that this is not Linux. ... So, why the Raspberry Pi 3 Model B does not use Linux? Is there any plan to move to Linux? This is entirely preposterous. Of course the Pi uses Linux. If your vi...
by CarlRJ
Thu May 18, 2017 6:03 pm
Forum: Troubleshooting
Topic: Pi Zero W as AIRPRINT server - HELP
Replies: 6
Views: 4388

Re: Pi Zero W as AIRPRINT server - HELP

I just came accross a post saying something I never read before in any tutorial : energy saving mode has to be turned off if using wifi (which we obviously do). The WiFi powersave mode problem/fix is only for Realtek RTL8192 (and RTL8188) WiFi chips. These chips are used in some popular WiFi USB do...
by CarlRJ
Tue May 16, 2017 9:43 pm
Forum: General discussion
Topic: Does the newest Raspbian work properly on old Pi's?
Replies: 3
Views: 613

Re: Does the newest Raspbian work properly on old Pi's?

My first Pi (of many) is a Model B purchased in the first days of 2014. All my Pi's including that one, run recent versions of Raspbian - the only reason it isn't running the very latest release at the moment, is sloth on my part. The RPF have not yet obsoleted any Pi, current Raspbian supports them...
by CarlRJ
Sat May 13, 2017 4:30 am
Forum: General discussion
Topic: Is the Raspberry Pi a good ePaper platform?
Replies: 13
Views: 2855

Re: Is the Raspberry Pi a good ePaper platform?

Is the Pi a good fit for ePaper even though it is power hungry and run a full OS? Sleep modes are also pretty immature. The Pi is not power hungry compared to a desktop PC, and the sleep modes are not immature, they're pretty much not there (would you argue that a bicycle has a poor engine, or simp...

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