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by W. H. Heydt
Fri May 24, 2019 4:52 am
Forum: General discussion
Topic: Weird boot up
Replies: 14
Views: 279

Re: Weird boot up

Dri-Files wrote:
Fri May 24, 2019 1:55 am
For a clearer look at the problem...
https://youtu.be/GD5qraNR-Gw
It would be a lot clearer if it was a static shot.
by W. H. Heydt
Fri May 24, 2019 2:11 am
Forum: Troubleshooting
Topic: Raspberry Pi B 3 USB Current limiter dead
Replies: 5
Views: 132

Re: Raspberry Pi B 3 USB Current limiter dead

descrover wrote:
Thu May 23, 2019 9:11 pm
But i want to use it as a portable computer for my job.
I suggest you invest $35 in a new Pi for work.
by W. H. Heydt
Thu May 23, 2019 6:26 pm
Forum: General discussion
Topic: number of users that can connect to raspberry 3b
Replies: 19
Views: 409

Re: number of users that can connect to raspberry 3b

At 20 connected sessions a PDP-11/70 running bsd 2.9 got pretty slow. A Pi3B+ is *lot* faster, but Raspbian has a lot more background stuff running. How many people are *likely* to be connected at the same time? It also depends, of course, on what the people are doing. If they're all trying to compi...
by W. H. Heydt
Thu May 23, 2019 2:40 pm
Forum: Beginners
Topic: Battery for Raspberry Pi
Replies: 3
Views: 130

Re: Battery for Raspberry Pi

It's certainly possible. How many AA batteries (cells, really) it will take will depend on what type they are. For instance, the nominal cell voltage for zinc-carbon/alkaline is 1.5v. For NiCad it's 1.2v per cell. Getting the same stored energy is trickier as Li Ion has a relatively high energy dens...
by W. H. Heydt
Thu May 23, 2019 5:18 am
Forum: Beginners
Topic: Pi 3 Model B+ - not starting up
Replies: 10
Views: 276

Re: Pi 3 Model B+

kentor21 wrote:
Thu May 23, 2019 4:43 am
Powering it on without sd card can damage the hardware?
No. That won't damage anything.
by W. H. Heydt
Thu May 23, 2019 5:17 am
Forum: Beginners
Topic: Window too big in 3.5 inch display
Replies: 11
Views: 993

Re: Window too big in 3.5 inch display

It won't really help...but the same problems occur with the RPF 7" screen.
by W. H. Heydt
Wed May 22, 2019 10:11 pm
Forum: Off topic discussion
Topic: ARM, Broadcom pull the plug on Huawei
Replies: 14
Views: 533

Re: ARM, Broadcom pull the plug on Huawei

The "monorail" remark was, indeed, a "one track mind" reference. The whole situation is political. No way to get around *that*. Bear in mind that the incumbent is there only because of the peculiarities and concerns of the 18th century framers of the US Constitution. He won because of the way the El...
by W. H. Heydt
Wed May 22, 2019 9:57 pm
Forum: General discussion
Topic: Screen goes black after boot
Replies: 9
Views: 180

Re: Screen goes black after boot

When I put it into an adapter and put it into my laptop to edit the file, I couldn’t find the rc.local or the etc/profile path, at all. They just didn’t show up anywhere. I looked in ever folder, and subfolder. Is your laptop running Windows? Windows can't see the main (EXT4) partition. That's why ...
by W. H. Heydt
Wed May 22, 2019 7:04 pm
Forum: General discussion
Topic: Screen goes black after boot
Replies: 9
Views: 180

Re: Screen goes black after boot

Gotcha, makes sense. Any idea how I would fix it?? 1. Take another SD card and load Raspbian on it (Raspbian Lite is sufficient). 2. Boot from the second card. 3. Put the original card in a USB adapter. 4. Plus the adapter into a USB port. 5. Edit the file on the original card to have the "&" at th...
by W. H. Heydt
Wed May 22, 2019 3:03 pm
Forum: Off topic discussion
Topic: ARM, Broadcom pull the plug on Huawei
Replies: 14
Views: 533

Re: ARM, Broadcom pull the plug on Huawei

I see the RISC-V monorail is still operating... What I'm rather more concerned about is what effect--if any--that idiot in Washington's import duties will have on the price of Pis. It's not like the supply chain can absorb a 25% duty. On the other hand, it may shift shipments to the US to being excl...
by W. H. Heydt
Wed May 22, 2019 5:35 am
Forum: General discussion
Topic: Unknown Behaviour - All networking starting to fail.
Replies: 8
Views: 347

Re: Unknown Behaviour - All networking starting to fail.

There is no chance of broken pi !! Because this happen while I working on it . I was working on my project it working perfectly and while working , it suddenly happen and it go in this state !! What--precisely--does working on your project entail? Were you making GPIO connections while the Pi was p...
by W. H. Heydt
Tue May 21, 2019 11:04 pm
Forum: Beginners
Topic: using the pi
Replies: 8
Views: 247

Re: using the pi

Whether or not you can use a Pi as your primary (desktop) computer is a complex and controversial topic. It depends on several things, such as what you expect your main computer to be capable of doing and how you use it. For lightweight usage, e-mail (including webmail), a browser in which you never...
by W. H. Heydt
Tue May 21, 2019 5:39 am
Forum: Compute Module
Topic: Upgrade to CM3+ Lite W ?
Replies: 4
Views: 126

Re: Upgrade to CM3+ Lite W ?

The form factor of the CM is dictated by two things. First, the needed components. If that was all there was to it, it could be considerably smaller, hence the empty space. The second is the size of the connector. The whole point of the CM is to expose all available interfaces and let the buyer desi...
by W. H. Heydt
Mon May 20, 2019 11:31 pm
Forum: General discussion
Topic: is a RPi safe arround a pacemaker?
Replies: 7
Views: 197

Re: is a RPi safe arround a pacemaker?

I don't have a pace maker...but my wife does. She was given a considerable collection of literature, including what things to stay away from--and how far away to stay. Computers were not on the list. Contrary to the situation in prior years, microwave ovens are not on the current list, either. The o...
by W. H. Heydt
Mon May 20, 2019 11:16 pm
Forum: General discussion
Topic: Running a Raspberry Pi and SSD/HDD Via Battery
Replies: 1
Views: 72

Re: Running a Raspberry Pi and SSD/HDD Via Battery

I haven't done that particular set up, but I can give some general guidelines. 1. Determine how much current (at 5v) you actually require. 2. Assume 15% to 20% in voltage conversion losses. 3. Li Ion and LiPo cells are nominally 3.7v, a fact that is often omitted when the capacity in Ah (or, more co...
by W. H. Heydt
Mon May 20, 2019 2:59 pm
Forum: Beginners
Topic: remote screen that runs code from raspberry
Replies: 2
Views: 80

Re: remote screen that runs code from raspberry

Connect the two systems (the "recipe server" and the kitchen system) over your LAN.

For the kitchen system, take a look at the RPF 7" touch screen. Linked to the green "Buy" tag at the top of the page.... https://www.raspberrypi.org/products/ra ... h-display/
by W. H. Heydt
Mon May 20, 2019 1:37 pm
Forum: General discussion
Topic: Segmentation fault
Replies: 2
Views: 146

Re: Segmentation fault

Because indentation is important in Python and general forum software strips it out, you should always put programs inside "code" tags.
by W. H. Heydt
Mon May 20, 2019 4:55 am
Forum: Off topic discussion
Topic: Anyone using a Pi (as a tablet) as their main computer?
Replies: 10
Views: 512

Re: Anyone using a Pi (as a tablet) as their main computer?

W.H., My only issue is that it must be touch-based, else, it's not much use as a tablet for me. Love the idea of a with a 15" screen though. Would have a lot of fun with that! If you end up getting it, I'd love to hear your experience. If I get one, it probably wouldn't be before next year. As for ...
by W. H. Heydt
Mon May 20, 2019 4:43 am
Forum: General discussion
Topic: Raspberry Pie Zero W compliance
Replies: 3
Views: 121

Re: Raspberry Pie Zero W compliance

No offense meant...but why do you think anyone here is likely to have better information than your "UL guy"?

The Pi0W itself has been tested for regulatory compliance. However, when you make it part of something else, you need to test the entire product even though the Pi0W is known to pass.
by W. H. Heydt
Mon May 20, 2019 4:41 am
Forum: General discussion
Topic: what can i do System information.
Replies: 3
Views: 124

Re: what can i do System information.

You can get a "shell command area" by opening lxterminal. That's what it's for and all it does.

The real point is that shell commands are powerful and often easier to use the GUI commands. Even more power is by combining shell commands into shell scripts.
by W. H. Heydt
Mon May 20, 2019 1:11 am
Forum: General discussion
Topic: Weird boot up
Replies: 14
Views: 279

Re: Weird boot up

FYI...the way I normally mount a 3.5" screen to a Pi0/Pi0W is to solder a set of header pins in place and then just attach the screen to those.
by W. H. Heydt
Sun May 19, 2019 4:29 pm
Forum: General discussion
Topic: setup Raspberry Pi Zero without internet access and only 1 micro usb port
Replies: 14
Views: 341

Re: setup Raspberry Pi Zero without internet access and only 1 micro usb port

No it is for personal use, so there are no problems with drivers having different hw? No problems. Raspbian is shipped with drivers for the hardware on all models of Pi to date. The Pi Zero and Pi 1 range use a different Linux kernel to the Pi 2 and 3, but the bootloader takes care of that for you....
by W. H. Heydt
Sun May 19, 2019 3:27 pm
Forum: General discussion
Topic: setup Raspberry Pi Zero without internet access and only 1 micro usb port
Replies: 14
Views: 341

Re: setup Raspberry Pi Zero without internet access and only 1 micro usb port

The *easiest* way would be to do the setup on a Pi B (any version). If you're doing an embedded system, the better alternative is to use a CM. Then you can design a carrier board with whatever interfaces you need. I have a Pi 3 B but why should be better than the Pi 0 W having different hw? the Pi ...
by W. H. Heydt
Sun May 19, 2019 4:26 am
Forum: General discussion
Topic: setup Raspberry Pi Zero without internet access and only 1 micro usb port
Replies: 14
Views: 341

Re: setup Raspberry Pi Zero without internet access and only 1 micro usb port

in production I don't need internet access and the SD will be read-only for suddenly shutdowns so that's the reason for the USB stick external storage from your answers I deduce that the easiest way would be to setup on the Pi Zero W via WiFi the SD and the USB stick and then move both on the Pi Ze...
by W. H. Heydt
Sat May 18, 2019 3:27 am
Forum: General discussion
Topic: Accuracy of Raspberry Pi "clock"
Replies: 39
Views: 12455

Re: Accuracy of Raspberry Pi "clock"

seanspotatobusiness wrote:
Sat May 18, 2019 12:38 am
If the Pi gains or loses a fixed amount of time each day, couldn't a daily adjustment be programmed in? Or does the amount of time lost/gained vary?
Congratulations. You have necro'd a thread from OVER 6 years ago.

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