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by hippy
Fri Jan 17, 2020 2:54 pm
Forum: General discussion
Topic: Do HDMI displays need power?
Replies: 6
Views: 319

Re: Do HDMI displays need power?

Depending on what the display requires by way of voltage and current it is potentially possible to use a single HDMI cable to get power and HDMI to a remote display. One can inject power at one end, extract it at the other, using additional adapters or by hacking the boards at both ends. It might be...
by hippy
Fri Jan 17, 2020 2:37 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 305
Views: 12179

Re: Future of raspberry pi

I'm thinking about some wire diagram, or perhaps a table with some commands... Sounds like a good idea but would probably be something best done by a third-party; the RPT providing the means, third-parties exploiting those means to deliver tools to use for users. I am perfectly happy with the RPT f...
by hippy
Fri Jan 17, 2020 1:41 pm
Forum: Off topic discussion
Topic: algorithms and ethics at the Barbershop
Replies: 37
Views: 1508

Re: algorithms and ethics at the Barbershop

The algorithm which intrigues me, and is Pi related, is whatever CeX are using to set their pricing for second-hand Pi's, and probably everything else they sell. The price of a Zero W has shot up from £10, to £12, then £15, and now £18, over the course of just a few months. The Pi 4B 1GB has though ...
by hippy
Thu Jan 16, 2020 5:05 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 305
Views: 12179

Re: Future of raspberry pi - software related

Going further it would be great to have some kind of "BIOS setup", so that one could do things like change the boot options without ever needing to put in a SD card. I am wondering if that would be worth the effort or if it serves any real purpose when the overwhelming majority of people do manage ...
by hippy
Thu Jan 16, 2020 2:41 pm
Forum: Raspbian
Topic: Screen Blanking not working
Replies: 3
Views: 105

Re: Screen Blanking not working

For latest Raspbian Buster, adding two lines at the end of what already existed worked for me ... sudo nano /etc/xdg/lxsession/LXDE-pi/autostart @xset s off @xset -dpms That worked without explicitly adding any screen saver. I don't know if any screensaver 's pre-installed or not. If it isn't, you a...
by hippy
Thu Jan 16, 2020 2:31 pm
Forum: Raspbian
Topic: Raspbian Buster Lite (09/2019) reporting wrong CPU for RaspberryPi4
Replies: 10
Views: 348

Re: Raspbian Buster Lite (09/2019) reporting wrong CPU for RaspberryPi4

It reports being a Raspberry Pi4B, which is good, but also a BCM2835, which was the first generation of RaspberryPi (ARM11). It should rather report as a BCM2711. Confusion over the "wrong CPU" being reported for Pi boards has been around for a long time and will continue to cause confusion and pos...
by hippy
Thu Jan 16, 2020 1:05 pm
Forum: Advanced users
Topic: Raspberry pi to Arduino pro mini using FTDI cable
Replies: 13
Views: 377

Re: Raspberry pi to Arduino pro mini using FTDI cable

Setting the uploader to "ATMega328 16 MHz (Old bootloader)" when I read that it did seem familiar but I can't find it in the Arduino IDE I have version 1.8.10 installed Unfortunately I don't seem able to get a screenshot from my Pi with the menus open but ... For 1.8.10, clicking Tools, the drop-do...
by hippy
Thu Jan 16, 2020 12:36 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 305
Views: 12179

Re: Future of raspberry pi - software related

A more standard GPIO library would be good. I tend to use my own code to poke things via /dev/gpiomem but that won't let me access PWM and other functions. If that could be extended, or some other /dev/ interface created that would be nice. That's why I suggested a comprehensive mechanism. Where GP...
by hippy
Thu Jan 16, 2020 12:16 pm
Forum: Beginners
Topic: How to run .exe files on raspbian
Replies: 82
Views: 67064

Re: How to run .exe files on raspbian

Let's just let the OP (and others who persistently insist) in proceeding by themselves .... The thing is that OP's and others encouraging them would be quite happy with that. It would IMO be better if those who pile-in and insist it cannot be done, or try to discourage or dissuade, would indeed jus...
by hippy
Thu Jan 16, 2020 2:12 am
Forum: Beginners
Topic: power rpi-4 via the 40 pin header
Replies: 17
Views: 3045

Re: power rpi-4 via the 40 pin header

I don't know where you've seen that. It's common knowledge that the Pi 4B can be powered via the "GPIO" header if you supply a stable 5V with sufficient current to the correct pins. After all, that's how the official PoE HAT does it. In this very thread and others ... Second post in this thread spe...
by hippy
Thu Jan 16, 2020 1:49 am
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 305
Views: 12179

Re: Future of raspberry pi

It would be fantastic to see somebody pick up development of the WiringPi library. Of all the various GPIO libraries, WiringPi was especially easy to use -- even in shell scripts. I don't know if it should be WiringPi but I think it would be great if there were a single recommended GPIO utility int...
by hippy
Thu Jan 16, 2020 12:58 am
Forum: General discussion
Topic: Battery holders
Replies: 8
Views: 313

Re: Battery holders

I wasn't meaning I thought the battery or its box were the cause, just that they are currently why no current flows. I see what you mean. And I think we'd both agree the best option now is a new battery box. Check the Pi works via USB with no sensors or add-ons, then that it does with the new batte...
by hippy
Wed Jan 15, 2020 7:52 pm
Forum: General discussion
Topic: what have i got?
Replies: 32
Views: 1009

Re: what have i got?

No, not just B. I'm seeing only "No Entry" signs, but grey and write instead of red and white. I'm just seeing two text lines, each of which say "Image". NOIMG.jpg That seems to be the 'alt=' tag ... <br> <img src="https://lh3.googleusercontent.com/iPQClDK09xDROuDsBywQI3ND1JnQktjq3EwT74emRAPIKExvZM...
by hippy
Wed Jan 15, 2020 6:20 pm
Forum: Automation, sensing and robotics
Topic: Device to measure angle for input to RPI
Replies: 3
Views: 201

Re: Device to measure angle for input to RPI

I would have thought a rotary potentiometer, perhaps with some gearing, might be ideal. Possibly a linear potentiometer attached to some linkage. A microcontroller with ADC input and some sort of on-chip RF connectivity is probably ideal if you are looking for long battery life. There are many very ...
by hippy
Wed Jan 15, 2020 6:06 pm
Forum: Windows 10 for IoT
Topic: How to Install Microsoft windows 10 IOT on Raspberry PI 4 ?
Replies: 24
Views: 2943

Re: How to Install Microsoft windows 10 IOT on Raspberry PI 4 ?

Heater wrote:
Tue Jan 14, 2020 8:27 pm
I happen to think the education of a children should not be dependent on such a corporation. Be it MS or Apple or whoever.
I don't see anyone arguing that it should be nor see how it ever would be. Getting Windows 10 IOT to work on a Pi 4B is hardly going to deliver that outcome.
by hippy
Wed Jan 15, 2020 4:48 pm
Forum: General discussion
Topic: PCIe over cable standard. I didn't know that was a thing.
Replies: 22
Views: 879

Re: PCIe over cable standard. I didn't know that was a thing.

I don't expect to see a Pi 4A - the market for the A variant has always been small, and with the power optimisation being done on the Pi 4B there may not be any reason to even try building one. Raspberry Pi themselves have also said they don't currently see a Pi 4A happening. Having PCIe headers or...
by hippy
Wed Jan 15, 2020 4:16 pm
Forum: General discussion
Topic: Battery holders
Replies: 8
Views: 313

Re: Battery holders

I suspect the battery holder as the OP specifically mentions it gives no voltage with or without batteries. To me, that says the wires are broken. I would suspect 'cascade failure', not necessarily the cause of the primary issue. My suspicion is something was wired wrongly on the Ultraborg or senso...
by hippy
Wed Jan 15, 2020 4:01 pm
Forum: Advanced users
Topic: Raspberry pi to Arduino pro mini using FTDI cable
Replies: 13
Views: 377

Re: Raspberry pi to Arduino pro mini using FTDI cable

Is there even a bootloader in the Arduino ? Oh yes, they do. It's a very small programme that allows the system to be updated from serial. As supplied, ICSP is about the only way to do it. Sorry I wasn't clear; I was meaning is it actually installed and present, that what the OP has isn't just a ba...
by hippy
Wed Jan 15, 2020 3:38 pm
Forum: Beginners
Topic: How to run .exe files on raspbian
Replies: 82
Views: 67064

Re: How to run .exe files on raspbian

As everyone else has pointed out. Windows binaries are a going to be a no-go on ARM based Linux. That depends on what one means by "Windows binaries", and whether by "run" one means "natively execute" or "coerced into doing what it is expected to do". Most people with a .exe file they want to "run"...
by hippy
Wed Jan 15, 2020 3:04 pm
Forum: Beginners
Topic: Running fan on 3.3 volts instead of the nominal 5 V
Replies: 20
Views: 520

Re: Running fan on 3.3 volts instead of the nominal 5 V

What I am going to do next time I shutdown the system is to fetch my cheapo multimeter & measure currents drawn by the fan in operation, and when starting and shutting down : I hope the figures - that I'll be sure to report here for discussion - will be low enough to assure my and everyone's peace ...
by hippy
Tue Jan 14, 2020 10:04 pm
Forum: Advanced users
Topic: Raspberry pi to Arduino pro mini using FTDI cable
Replies: 13
Views: 377

Re: Raspberry pi to Arduino pro mini using FTDI cable

Thanks for the loopback code, I tried it and it looks like my cable is working fine, I watched A,B,C... scroll down the screen without an issue, not really sure what to try now, I believe I have fixed my arduino IDE software, I know my cable is working but the arduinos still won't talk to me :( :( ...
by hippy
Tue Jan 14, 2020 9:14 pm
Forum: Beginners
Topic: RPi not visible in Windows network WORKGROUP
Replies: 36
Views: 780

Re: RPi not visible in Windows network WORKGROUP

Took me months to figure out why a known working Samba configuration for my Pi would no longer work and how to resolve that when Samba decided to change its defaults. It's not always as easy as it's meant to be.
by hippy
Tue Jan 14, 2020 9:05 pm
Forum: General discussion
Topic: Battery holders
Replies: 8
Views: 313

Re: Battery holders

Even Duracell AA batteries can deliver a lot of current, produce a lot of heat in wiring, when shorted. I would suspect a short on the Pi-side rather than a battery or battery holder problem.
by hippy
Tue Jan 14, 2020 8:56 pm
Forum: Beginners
Topic: How to run .exe files on raspbian
Replies: 82
Views: 67064

Re: How to run .exe files on raspbian

Eltech's ExaGear apparently used to run Roblox on a Pi, but since that's gone AWOL, it would seem one would have to use some other means of emulation.
by hippy
Tue Jan 14, 2020 8:41 pm
Forum: Other projects
Topic: Photo Booth Help
Replies: 136
Views: 15529

Re: Photo Booth Help

pygame 1.9.4.post1 Hello from the pygame community. https://www.pygame.org/contribute.html mmal: mmal_vc_port_enable: failed to enable port vc.ril.image_encode:out:0(JPEG): ENOMEM mmal: mmal_port_enable: failed to enable port vc.ril.image_encode:out:0(JPEG)(0x2925110) (ENOMEM) Backend terminated or...

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