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by W. H. Heydt
Mon Oct 21, 2019 5:04 am
Forum: Troubleshooting
Topic: Lighting bolt only when I swap image
Replies: 2
Views: 43

Re: Lighting bolt only when I swap image

It sounds like the failing image is running the GPU harder than the working image. This suggests that either your power supply is inadequate, or the cable connecting the PSU to the Pi is too thin, too long, or both.

What are you using to power the Pi?
by W. H. Heydt
Mon Oct 21, 2019 4:49 am
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

My point was that the RPF keyboard has a built in USB hub. The integrated hub is indeed a good point, why aren't keyboards more frequently built that way? If one had a direct micro USB to micro USB cable, one could save the USB adapter on the Zero! But I have to be greedy on power and -even built i...
by W. H. Heydt
Sun Oct 20, 2019 11:23 pm
Forum: Beginners
Topic: Power supply
Replies: 8
Views: 158

Re: Power supply

Ierdyr wrote:
Sun Oct 20, 2019 5:30 pm
(I am new to English and most google translate so sorry if I missed something)
Just for your information... These forums have an extensive list of sub-forums in various non-English languages. The odds are very good that there is one for your native language.
by W. H. Heydt
Sun Oct 20, 2019 10:34 pm
Forum: General discussion
Topic: Battery Uptime
Replies: 4
Views: 92

Re: Battery Uptime

Create a .sh procedure that will append (>>) output of "date" command to a previously created .txt file. Also, create a crontab entry calling that .sh procedure every 10 minutes or less. First and last entry into .txt file should be measured time period. After rebooting you have less than 10 minute...
by W. H. Heydt
Sun Oct 20, 2019 10:32 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

By way of some perspective, think about this: If you start writing software, in Python or whatever, at a young age and you do it tenaciously everyday for your entire life you will be hard pressed to have written 10MB of code before you drop dead at the keyboard. That leaves almost 500MB of space in...
by W. H. Heydt
Sun Oct 20, 2019 10:28 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

Haven't actually tried this but it should work... RPF keyboard connected to the (sole) USB port. Mouse connected to the keyboard. The easiest way (if you need keyboard+mouse) is to use a 2,4GHz wireless keyboard/mouse combination. That works out of the box. This is also the least power demanding so...
by W. H. Heydt
Sun Oct 20, 2019 8:33 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

By way of some perspective, think about this: If you start writing software, in Python or whatever, at a young age and you do it tenaciously everyday for your entire life you will be hard pressed to have written 10MB of code before you drop dead at the keyboard. That leaves almost 500MB of space in...
by W. H. Heydt
Sun Oct 20, 2019 8:27 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

One big advantage IMHO is, if its a headless setup where you don't need (won't be using) ethernet and 4 USB ports, its a big cost saving over a 3B or 4B. I plug my USB hub in do my setup, then just deploy it and let it use WIFI. Smaller footprint too compared to a 3B or 4B. I use them where a ZERO ...
by W. H. Heydt
Sun Oct 20, 2019 5:19 am
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

The mainframe at the first company I worked for out of college had 32K bytes of memory. It was the only computer in the company that did about $200 million in business per year. That was in 1970. It was an IBM S/360-30.
by W. H. Heydt
Sat Oct 19, 2019 11:38 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

Thanks for your positive replies. If only you could give me links to those projects.( thanks for the weather station link). Not sure I understand it all but I will try and look them up. So, Is it really for hardware extensions? Sorry, I don't mean to act stupid it is just I am new to this and have ...
by W. H. Heydt
Sat Oct 19, 2019 8:57 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 47
Views: 818

Re: Pi 3 A +. What is it for?

How soon we forget... 512MB memory is quite useful for any number of things. It's also twice what the original Pi Model B had. So what can you do with a Pi3A+? Anything a Pi0, Pi0W, or A+ can do, but with a lot more CPU capability. If DRAM prices continue their downward trend, it's *possible* that w...
by W. H. Heydt
Sat Oct 19, 2019 8:07 pm
Forum: Off topic discussion
Topic: Auto locking threads
Replies: 24
Views: 518

Re: Auto locking threads

I could support an autotlock of threads six months after the last post.
by W. H. Heydt
Wed Oct 16, 2019 11:28 pm
Forum: General discussion
Topic: Raspberry Pi Cluster Computer?
Replies: 31
Views: 943

Re: Raspberry Pi Cluster Computer?

You need to pick things to run on a cluster that can be partitioned into separate tasks doing a part of of the overall process. Clusters--when they scale to modern supercomputers--are specifically for doing those sorts of things. A cluster of Pis is a perfectly good way to learn how to program for s...
by W. H. Heydt
Tue Oct 15, 2019 3:50 pm
Forum: Advanced users
Topic: Raspberry Pi at home and at work
Replies: 6
Views: 336

Re: Raspberry Pi at home and at work

Simplest way...use two different microSD cards. One for work, one for home. If you need to have common data files, put them on a USB stick. There are some really tiny USB storage devices that you can just leave in the Pi when you move it.
by W. H. Heydt
Tue Oct 15, 2019 2:33 pm
Forum: General discussion
Topic: Current State of Raspberry Pi 4 Software and Hardware Support
Replies: 53
Views: 2742

Re: Current State of Raspberry Pi 4 Software and Hardware Support

The one thing I can think of that could potentially give us a Pi4B+ really can't be done because there is no room to run new tracks. It would be to add a pin or two to be a fan header. For that, I believe we will have to hope that it appears on the Pi5B....and I don't expect that for 2 to 3 years, ...
by W. H. Heydt
Tue Oct 15, 2019 12:40 am
Forum: General discussion
Topic: Raspberry Pi Solar-Powered: Great OnLine Tool
Replies: 8
Views: 323

Re: Raspberry Pi Solar-Powered: Great OnLine Tool

Great post, will definitely bookmark this for future reference, if only to point out to people that their Pi will not run 24/7/365 on a "15W" solar panel because it's the same as the official power supply spec. That and just how much battery capacity it takes to run continuously and allow for poor ...
by W. H. Heydt
Mon Oct 14, 2019 3:02 pm
Forum: General discussion
Topic: Current State of Raspberry Pi 4 Software and Hardware Support
Replies: 53
Views: 2742

Re: Current State of Raspberry Pi 4 Software and Hardware Support

Raspberry Pi 4 Model B+ I have a feeling that an enhanced model of the Pi 4 could come out soon, due to previous problems with the temperature of Pi 4's CPU. Maybe it won't be called B+ (see: Raspberry Pi Zero versions), but you get the point. Do you think this is a silly thought, or might I be int...
by W. H. Heydt
Mon Oct 14, 2019 3:36 am
Forum: General discussion
Topic: Picroft for RPi4 update?
Replies: 2
Views: 125

Re: Picroft for RPi4 update?

Best to ask whoever maintains it. Of course, they may suggest that you help out...
by W. H. Heydt
Mon Oct 14, 2019 1:24 am
Forum: Beginners
Topic: Raspberry pi 4 and fan
Replies: 9
Views: 635

Re: Raspberry pi 4 and fan

The fan should not be connected directly to a GPIO. It is likely to draw too much current, and may produce back EMF when switched off. Either of these will damage the Pi. The Amazon listing does not give a specification for the fan supply (neither voltage nor current). You might get away with conne...
by W. H. Heydt
Sun Oct 13, 2019 5:09 am
Forum: Troubleshooting
Topic: configuring new Buster on 3B. no wired network. how to configure wired network on buster?
Replies: 6
Views: 188

Re: configuring new Buster on 3B. no wired network. how to configure wired network on buster?

fredex wrote:
Sat Oct 12, 2019 9:08 pm
but looking at the same file on the old SD card, it doesn't contain any of that stuff (well it does, but it's all commented)
Without specifically checking...that file is almost certainly owned by root. Prefix your editor command with "sudo" to edit it. E.g. sudo vi /etc/dhcpcd.conf
by W. H. Heydt
Sun Oct 13, 2019 2:59 am
Forum: General discussion
Topic: PrintDrone wall printing graffiti drone
Replies: 8
Views: 663

Re: PrintDrone wall printing graffiti drone

Just working from the thread title...why would the RPF want to be associated with such a thing in the first place?
by W. H. Heydt
Sun Oct 13, 2019 1:17 am
Forum: Compute Module
Topic: PI 4 Compute module with pci-e?
Replies: 57
Views: 16586

Re: PI 4 Compute module with pci-e?

I think someone said a Model Pi4A has been ruled out? And a Compute4 is still ???? Who said that? The decision was made that there will never be a Pi4A. https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=250303 Never say never? A different connector than USB3 for the PCI-e? If you follow the l...
by W. H. Heydt
Sat Oct 12, 2019 7:59 pm
Forum: General discussion
Topic: quest for a nice compact keyboard ?
Replies: 11
Views: 496

Re: quest for a nice compact keyboard ?

Of course you are right that £150 is a ridiculous amount to spend on a keyboard but it has company for quality mechanical keyboards in the £100 - £200 bracket. The only keyboard worth any sort of silly money is the IBM M-series. They are still being made by Unicomp Inc. https://www.pckeyboard.com/p...
by W. H. Heydt
Sat Oct 12, 2019 5:41 pm
Forum: Troubleshooting
Topic: My Raspberry Pi is electricuting me with TV Hat
Replies: 4
Views: 178

Re: My Raspberry Pi is electricuting me with TV Hat

The shells of the USB ports and Ethernet jack getting warm is to be expected. They're part of the general heat dissipation for the SoC.
by W. H. Heydt
Sat Oct 12, 2019 5:38 pm
Forum: Beginners
Topic: Second Gigabit for PI 4B
Replies: 7
Views: 374

Re: Second Gigabit for PI 4B

The USB C port on the Pi 4 is strictly a client port (device-only) at USB 2.0 speed No, it can run in Host or Device mode. See https://www.raspberrypi.org/documentation/hardware/raspberrypi/usb/README.md#overview_pi4 That says that it is intended to run in Client mode. Not that it can only run in t...

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