Go to advanced search

by ag123
Thu May 28, 2020 4:56 pm
Forum: General discussion
Topic: Connecting SSD via GPIO
Replies: 8
Views: 338

Re: Connecting SSD via GPIO

GPIOs typically has mhz ranges speed limits, even if they are hardware supported, i think most of that is between 10s of mhz to say 50 mhz, there are those that runs above 50mhz say upto 100-200mhz, and at those frequencies i think even the physical wiring and traces matter, e.g. a long enough wire ...
by ag123
Thu May 28, 2020 4:11 pm
Forum: General discussion
Topic: Why release an 8gb model without upgrading the processor?
Replies: 35
Views: 1784

Re: Why release an 8gb model without upgrading the processor?

the 8GB memory would allow 'heavy weights' programs that use significant amount of memory to run. e.g. 3d cad designs , all that 3d printing, mesh processing apps, host huge mysql / maria db or even in-memory databases, and most importantly, it is used as a disk cache, the cache hit scenario would b...
by ag123
Thu May 28, 2020 3:06 pm
Forum: General discussion
Topic: Raspberry Pi OS (64 bit) beta test version
Replies: 77
Views: 4224

Re: Raspberry Pi OS (64 bit) beta test version

hi , i'm downloading it, but perhaps make a torrent out of it? at 1GB it may get popular fast hence bittorrent may help there.
by ag123
Thu May 28, 2020 2:49 pm
Forum: General discussion
Topic: Should I buy 8Gb Model
Replies: 76
Views: 3281

Re: Should I buy 8Gb Model

one day Microsoft may offer Windows 10 on Pi :lol:
by ag123
Thu May 28, 2020 1:43 pm
Forum: Advanced users
Topic: How to connect (throught SSH) to the Pi throught mobile phone
Replies: 17
Views: 592

Re: How to connect (throught SSH) to the Pi throught mobile phone

i think one of the simpler ways is to run something like a mqtt server that funnel data between the remote device (sensor) and Pi.
but these days there seemed to be many alternatives than simply mqtt
by ag123
Thu May 28, 2020 1:28 pm
Forum: General discussion
Topic: Raspberry Pi OS (64 bit) beta test version
Replies: 77
Views: 4224

Re: Raspberry Pi OS (64 bit) beta test version

actually 1 of the concern is if the 'old' 32 bit binaries would run :lol:
it seemed it should be possible as over in this thread
viewtopic.php?f=29&t=275398
i managed to run 64 bit apps (on 64 bits kernel) in 32 bits userland ;)
by ag123
Thu May 28, 2020 11:08 am
Forum: General discussion
Topic: Raspberry Pi OS (64 bit) beta test version
Replies: 77
Views: 4224

Re: Raspberry Pi OS (64 bit) beta test version

thanks i may try this out, since i'm running [email protected] which uses the 64 bits kernel. 64 bits is normally used if you need to go beyond 4GB , but apps today are being built with an assumption it would go beyond 4GB :lol:
by ag123
Thu May 28, 2020 10:49 am
Forum: Advanced users
Topic: Mixing 64 bits shared libraries on Raspbian buster
Replies: 1
Views: 137

Mixing 64 bits shared libraries on Raspbian buster

As i'm running the 64 bit kernel in Raspbian Buster i.e. /boot/config.txt [all] arm_64bit=1 i used the sysroot shared library distribution from linaro https://www.linaro.org/downloads/ created a directory /usr/lib64 and placed the libc.so in there libc-2.25.so libc.so.6 libgcc_s.so.1 and placed the ...
by ag123
Thu May 28, 2020 9:46 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 33168

Re: Why moving to 64bit?

32 bits tend to be more efficient on memory (the size of int is 32 bits, while it is 64 bits on 64 bits) and runs faster in 32 bits partly as memory transfers could be as much as halved so more data fit in cache as well. No, "int" remains the same size at 32 bits Linux (Raspbian) uses the LP64 memo...
by ag123
Thu May 28, 2020 8:33 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 273
Views: 33168

Re: Why moving to 64bit?

increasingly 64bits vs 32bits is more a matter of software maintenance. this is a really bad result but it is happening. some distributions and apps shipped only 64 bits and some shipped only 32 bits. 32 bits tend to be more efficient on memory (the size of int is 32 bits, while it is 64 bits on 64 ...
by ag123
Thu May 28, 2020 8:21 am
Forum: General discussion
Topic: Raspbian Buster on Pi 3B+?
Replies: 3
Views: 149

Raspbian Buster on Pi 3B+?

hi i'd just like to hear out those who are running the recent Raspbian Buster distribution on Pi 3B+. it'd seemed Raspbian Buster is 'optimised for Pi4', but how does it run on the Pi3? are there any particular issues? i did some searches and found some threads mentioning it is somewhat slower than ...
by ag123
Thu May 28, 2020 6:13 am
Forum: General discussion
Topic: Overclocking - Should I?
Replies: 29
Views: 1018

Re: Overclocking - Should I?

get a good heatsink + fan if you want to overclock. an overclocked Pi4 running intense loads easily reaches throttling temperatures around 80C. that can happen even if you have a passive heat sink. so active cooling i.e. heat sink + fan is normally needed. normally it is done for 'fun' than any real...
by ag123
Wed May 27, 2020 7:02 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

nice +1, i'd probably try building one after a batch of wu cleared. some of the earlier releases has a 'finish file too long' problem. currently, it seemed i encounter that error less often, hence i made do for now.
by ag123
Tue May 26, 2020 11:03 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

it is currently ranked 37 (BCM2835) in terms of (recent) average credit
https://www.boincstats.com/stats/14/hos ... /cpu/0/6/0
that makes it sit among the popular intel i7s, i5s and amd ryzens
by ag123
Tue May 26, 2020 10:30 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

it seemed there are now about a thousand Pi4 boards running [email protected] https://boinc.bakerlab.org/rosetta/cpu_list.php search for "BCM2835 [Impl 0x41 Arch 8 Variant 0x0 Part 0xd08 Rev 3]" hopefully it do get more popular. running [email protected] / boinc on Pi4 is one of the 'better' options as compar...
by ag123
Tue May 26, 2020 7:44 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

... i actually used <options> <ncpus>3</ncpus> </options> ... Does that actually work? According to the documentation: " <ncpus>N</ncpus> Act as if there were N CPUs; e.g. to simulate 2 CPUs on a machine that has only 1. Zero means use the actual number of CPUs. Don't use this to limit CPU usage; u...
by ag123
Mon May 25, 2020 11:52 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

try setting up rpi-monitor? that may help as you'd be able to look at the system state on the web https://github.com/XavierBerger/RPi-Monitor https://rpi-experiences.blogspot.com/ apt-get install rpimonitor occasionally, when high loads are running, i'm having trouble connecting too. But what i norm...
by ag123
Mon May 25, 2020 9:39 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

i got around similar figures too, a wee bit higher running 3 threads overclocked 1.75ghz, i ran only 3 threads, the motivation of which mainly is it keeps temperature kind of within the lower ranges that i prefer. running full loads on 3 threads averages between 42-45 deg C with my sink-fan combo. i...
by ag123
Mon May 25, 2020 9:00 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

the number of participants on [email protected] is dwindling out, the wu queue is still plenty long. so those who has a spare Pi4 (4GB) may like to try crunching [email protected] on the Pi4. get a sufficiently large sd card e.g. preferably like 8-16 gb and extend the file system after installation so that pr...
by ag123
Wed May 20, 2020 6:55 am
Forum: General discussion
Topic: Capacitor tester
Replies: 8
Views: 376

Re: Capacitor tester

i think it is quite possible to use the audio input as an ADC if the capacitors are not too small. the tactic for such a project is to use a gpio pin to generate an 'impulse' square wave and measuring the RC decay. https://www.electronics-tutorials.ws/rc/rc_2.html oops incorrect, pi audio jack doesn...
by ag123
Wed May 20, 2020 6:35 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

any one did some kind of power measurements on Pi4 while running [email protected]? one of the members on [email protected] community forum reported about 4 watts https://boinc.bakerlab.org/rosetta/forum_thread.php?id=13791&postid=95428 running on 3 threads overclocked to 1.75ghz, i'm getting about 950 points RAC http...
by ag123
Wed May 20, 2020 4:22 am
Forum: General discussion
Topic: displaying core temp on a webpage
Replies: 2
Views: 127

Re: displaying core temp on a webpage

you can try rpi-monitor https://rpi-experiences.blogspot.com/ https://github.com/XavierBerger/RPi-Monitor apt-get install rpimonitor otherwise your core termperature is in /sys/class/thermal/thermal_zone0/temp cat /sys/class/thermal/thermal_zone0/temp simply have a php script etc that reads that fil...
by ag123
Mon May 18, 2020 6:42 am
Forum: General discussion
Topic: Get your Pi to fight COVID-19
Replies: 179
Views: 6860

Re: Get your Pi to fight COVID-19

i did some comparisons between [email protected] running on Pi4 on their community forum https://boinc.bakerlab.org/rosetta/forum_thread.php?id=13791&postid=96596 reposted here: my Pi4 levelled off at around 954.14 RAC running on 3 threads 1.75ghz. Based on this https://boinc.berkeley.edu/wiki/Computatio...
by ag123
Sat May 16, 2020 5:16 am
Forum: General discussion
Topic: Raspberry Pi 4 no boot: Extreme (too hot to touch) heat on microsd card reader [SOLVED]
Replies: 26
Views: 1051

Re: Raspberry Pi 4 no boot: Extreme (too hot to touch) heat on microsd card reader [SOLVED]

i think this may be a problem of concern, did the engineers or someone studied the reasons for these overheating failures, shorts or something? at least to be assured that it isn't caused by firmware etc. why it matters? a lot of Pis are out in the field and no one looks at them, some are in enclosu...

Go to advanced search