Go to advanced search

by clicky
Thu Dec 05, 2019 11:27 am
Forum: General discussion
Topic: Raspberry Pi 4 is not a replacement for a real PC, (as it doesn't have Skype) sorry!
Replies: 72
Views: 2530

Re: Raspberry Pi 4 is not a replacement for a real PC, (as it doesn't have Skype) sorry!

Since this thread already disintegrated into divergent semi-chaos - maybe we can derail it even more: Quite amazing the responses to the one and only post by a misguided poster. @mods - is it worth doing something like what other forums do - for people with very low post count (1? <10?) have all thr...
by clicky
Tue Dec 03, 2019 7:52 pm
Forum: Java
Topic: Java IDE for Pi 4 - need to create simple GUI
Replies: 2
Views: 135

Re: Java IDE for Pi 4 - need to create simple GUI

IntelliJ Idea works well on Pi4. It is modern, up to date, fully featured, top of the range Java IDE. For many developers it is *the* best Java IDE...

And it has a free community version you won't find lacking important features at all!
by clicky
Tue Nov 19, 2019 1:50 pm
Forum: Off topic discussion
Topic: Logic NOPE gate IC
Replies: 20
Views: 971

Re: Logic NOPE gate IC

It's when we get ternary logic perfected that the chip makers will be able to add the ultimate DWIM* instruction and all computers will only need that and HALT to solve every problem. *DWIM == do what I mean I'm sorry - I just cannot refrain: :roll: - aren't scientist (read physicists) already work...
by clicky
Mon Nov 18, 2019 3:13 pm
Forum: General discussion
Topic: Pi zero W possible to increase wi-fi strength/range?
Replies: 28
Views: 1047

Re: Pi zero W possible to increase wi-fi strength/range?

Quick (lazy) question fired at Google and the answer is:

"As the unit we began with was meters we now know that the wavelength of a 2.4GHz signal is 0.125 meters or 12.5cm."

12.5cm / 4 = 3.125cm or 31.25mm
by clicky
Mon Nov 18, 2019 10:31 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 280
Views: 26674

Re: Pi4 as Desktop computer

Heater wrote:
Sun Nov 17, 2019 10:13 pm
Java Applets were a dismal failure because Java is an even worse language, they were slow, security was terrible.
ROFL. Is this some kind of flame war or just place where people pass their (uneducated?) opinions as facts? :P
by clicky
Sun Nov 17, 2019 11:36 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 280
Views: 26674

Re: Pi4 as Desktop computer

So a good coding challenge would be a 3D app or game that renders at 60fps at 4K? Is it possible? Depends how simple you make it. It might be possible: https://www.youtube.com/watch?v=8q9RJtGCjXM&feature=youtu.be Here is thing I am working on. It has really small number of polygons but uses several...
by clicky
Sat Nov 16, 2019 11:29 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 280
Views: 26674

Re: Pi4 as Desktop computer

That's an interesting result clicky. Certainly seems to be the GPU that is the bottleneck. Despite what everyone, everywhere says all the time, Javascript is not the problem in browsers. It really depends what you're using it for. In this instance CPU is relatively lightly used - a few calculations...
by clicky
Sat Nov 16, 2019 9:44 am
Forum: General discussion
Topic: Pi4 as Desktop computer
Replies: 280
Views: 26674

Re: Pi4 as Desktop computer

And now you lost me with that JS WebGL (performance) test. My Pi4 is averaging 4fps and in full screen from Chromium only 3fps. But, of course - that's, along with other 7fps/9fps, etc, just partial information which doesn't help a lot. My screen resolution is 2560x1600. On 1920x1080 it is 7fps and ...
by clicky
Fri Nov 15, 2019 8:19 am
Forum: General discussion
Topic: Fixing the Pi 4 usb C issue by hand
Replies: 39
Views: 9411

Re: Fixing the Pi 4 usb C issue by hand

supersjimmie wrote:
Fri Nov 15, 2019 7:32 am
Or easier to compose, but less pretty:
https://www.aliexpress.com/item/4000026719770.html
Brilliant! :D
by clicky
Fri Nov 15, 2019 8:14 am
Forum: General discussion
Topic: KDE desktop not working on the pi4
Replies: 22
Views: 641

Re: KDE desktop not working on the pi4

There might be some nuggets about KDE here: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=244171 I'm using KDE on daily bases and I'm happy with it. And just cannot remember what I've done to 'install it'. All I remember that it was fairly easy and stress free. Maybe Google helped a bit ab...
by clicky
Tue Nov 12, 2019 10:20 am
Forum: General discussion
Topic: Bitcoin Mining, is it worth it?
Replies: 32
Views: 38615

Re: Bitcoin Mining, is it worth it?

That sounds like a fun project. As you suspect, not worth it from a financial point of view, but fun. I teach electrical engineering for a living. You learn a lot from the work putting it together. Now the technical questions, super caps or batteries? How big of panels do you have? Will they track ...
by clicky
Mon Nov 11, 2019 8:03 pm
Forum: General discussion
Topic: Bitcoin Mining, is it worth it?
Replies: 32
Views: 38615

Re: Bitcoin Mining, is it worth it?

Running a 24 core 300w Intel server 24/7 for months would barely net you a penny if that. You could run the Pi the rest of your natural life and never see a return and you'll spend much much much more in electricity than you'll ever make. Only purpose for it would be purely educational to learn abo...
by clicky
Thu Nov 07, 2019 3:17 pm
Forum: General discussion
Topic: Raspberry Pi 4 as a primary desktop computer?
Replies: 54
Views: 5400

Re: Raspberry Pi 4 as a primary desktop computer?

I'm pretty sure that anybody who uses Chromium on RPi4 will eventually notice the freezing I'm talking about, and it will happen with more regularity than on your Intel i7. As for YouTube, sometimes it will just freeze but continue to play audio for several seconds, a behavior I don't see on other ...
by clicky
Thu Nov 07, 2019 10:42 am
Forum: General discussion
Topic: Sending real time video from one room to the other
Replies: 6
Views: 308

Re: Sending real time video from one room to the other

This is something I bookmarked some time ago and still quite keen to give it a go when I get chance:

https://befinitiv.wordpress.com/wifibro ... ideo-data/
by clicky
Fri Oct 25, 2019 8:06 pm
Forum: General discussion
Topic: Timeframe for USB C power board revision
Replies: 39
Views: 5387

Re: Timeframe for USB C power board revision

and you think that's gonna change something when you use a 'apple PSU' (it's not only apple, they're just the famous ones)? USB-C is rated up to 3A at 5V, even the 'apple charger' wont change that. They just go to higher voltage when delivering more juice which would need a power management IC (PMI...
by clicky
Fri Oct 25, 2019 2:24 pm
Forum: General discussion
Topic: Timeframe for USB C power board revision
Replies: 39
Views: 5387

Re: Timeframe for USB C power board revision

0.5g is not small amount of salt. Come on - we need USB boot fixed! Oh, sorry - wrong topic! Or, should I start with 'take it all with pinch of salt'? Now seriously: You wouldn't need to do that with an external adaptor. Just cut one of the two wires in the USB and connect that via the one resistor ...
by clicky
Fri Oct 25, 2019 8:14 am
Forum: Java
Topic: Java3D - Available GLVersions not set for EGLGraphicsDevice
Replies: 2
Views: 1414

Re: Java3D - Available GLVersions not set for EGLGraphicsDevice

Thanks for sharing link back to JOGL. That was helpful! :)
by clicky
Wed Oct 23, 2019 8:25 pm
Forum: General discussion
Topic: How to use nRF24 via CH340T serial-to-USB converter?
Replies: 14
Views: 929

Re: How to use nRF24 via CH340T serial-to-USB converter?

I think you'll need to slowly build up your knowledge of nRF24L01 first, then translate it to that board. Hints are here: https://forum.arduino.cc/index.php?topic=410574.30

Unless you find library which is doing same or similar to RF24 library in python. If you do - please share it here! :)
by clicky
Wed Oct 23, 2019 9:32 am
Forum: General discussion
Topic: Citrix will not do dual screen it will only chose one screen
Replies: 2
Views: 249

Re: Citrix will not do dual screen it will only chose one screen

I don't think that's Raspberry Pi issue. It would be the way 'full screen' or such is handled in Linux. Having said that - there must be someone here who would understand it better (currently I am just too lazy to go and do internet search for you). Key words are dual monitor, X windows, Linux, mayb...
by clicky
Tue Oct 22, 2019 10:20 am
Forum: General discussion
Topic: Raspberry Pi Cluster Computer?
Replies: 42
Views: 2968

Re: Raspberry Pi Cluster Computer?

What architecture could be designed so just buying another "module" and plugging it in increases the processing power? Can we design and make them on Pi's? What computing language is needed? Use $1 FPGA's that just add together like LittleBits? That would be interesting project to play with: 'mothe...
by clicky
Mon Oct 21, 2019 3:17 pm
Forum: General discussion
Topic: Battery Level Indicator -- While Charging
Replies: 13
Views: 994

Re: Battery Level Indicator -- While Charging

Voltage level is afaik a valid method of evaluating a lipo cells charge. Battery charging involves applying a target voltage which will be higher than the undercharged battery voltage. during charging the battery voltage will rise to that of the charge voltage until it hits its peak at 4,2v iirc vo...
by clicky
Mon Oct 21, 2019 9:59 am
Forum: General discussion
Topic: Battery Uptime
Replies: 8
Views: 552

Re: Battery Uptime

Hello, I'm testing a battery with a pi 3 - intention is to run it flat and see how long it will power the pi for. Is there an easy way to see uptime on the pi AFTER the battery dies and I plug it into the mains again? Running battery flat is usually a bad idea (for the battery). Maybe you should ge...
by clicky
Mon Oct 21, 2019 9:56 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 445
Views: 105940

Re: Raspberry Pi 4 usb boot?

Still no movement on booting RPi4 from usb....they dont seem to realise that to some users boot speed and reliabilty are important, come on guys you promised that this feature would be added, if it doesnt come soon we will be into Rpi 5 already Q. Do you think we are stupid A. No, we are not, and s...
by clicky
Sun Oct 20, 2019 8:39 pm
Forum: General discussion
Topic: Pi 3 A +. What is it for?
Replies: 52
Views: 2627

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 clicky
Fri Oct 18, 2019 9:48 am
Forum: General discussion
Topic: Raspberry Pi Cluster Computer?
Replies: 42
Views: 2968

Re: Raspberry Pi Cluster Computer?

Actually - I was considering having two Pis (due to memory constraints of one): one connected to monitor and keyboard running X windows and another on network using first as X terminal. Also, first (with SSD) would share disk over nfs (at least /home if not more!). That way I would be able to decide...

Go to advanced search