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by Technocolour
Tue Jun 02, 2020 1:28 pm
Forum: General discussion
Topic: Dead RPI 0
Replies: 12
Views: 407

Re: Dead RPI 0

If you have access to a electronics lab or similar equipment, you might try to look at it with an IR camera to see if anything lights up. (or spray it with alcohol and see if it boils away somewhere)? Otherwise, maybe have a look at the regulator to see if its healthy? I'm guessing it's this https:/...
by Technocolour
Thu May 28, 2020 5:24 pm
Forum: General discussion
Topic: Should I buy 8Gb Model
Replies: 76
Views: 3650

Re: Should I buy 8Gb Model

A faster cpu? Then you'd want to jump down to 16/14nm (where you want to be to get a faster CPU, since I don't think a natural replacement like an A76 have arch files up to 28nm). https://semiengineering.com/how-much-will-that-chip-cost/ So $20M minimum, probably higher (like 100% higher). That's no...
by Technocolour
Thu May 28, 2020 3:04 pm
Forum: General discussion
Topic: Should I buy 8Gb Model
Replies: 76
Views: 3650

Re: Should I buy 8Gb Model

OP should buy said Pi if he needs one, or would find it fun and have the means to do such purchases. I don't understand the meta discussion regarding RAM though? There are people who always can use more. (For an example of usage, I do number crunching on multi GB worth of sensor data, and I can assu...
by Technocolour
Sat May 02, 2020 8:21 pm
Forum: General discussion
Topic: YouTube on Raspberry Pi 4 Choppy!!
Replies: 26
Views: 12428

Re: YouTube on Raspberry Pi 4 Choppy!!

I use the standard Raspian Chromium (ver.78) and I've got h264ify enabled. I've been able to play YouTube videos just fine? (No comments on performance though, my standards are pretty low as I tend to not notice slow framerates and such)
by Technocolour
Fri Apr 24, 2020 8:24 pm
Forum: General discussion
Topic: Update to default Pi4 bootloader
Replies: 54
Views: 5110

Re: Update to default Pi4 bootloader

Random story time. I once needed to find out why one of our devices didn't want to update via the (well hidded) USB port. Turned out it worked just fine, kind of. It was just that the stick that was used by the testers needed such a long time to boot that our device decided that there was nobody hom...
by Technocolour
Fri Apr 24, 2020 8:05 pm
Forum: General discussion
Topic: Update to default Pi4 bootloader
Replies: 54
Views: 5110

Re: Update to default Pi4 bootloader

Thank you for the information. :)
by Technocolour
Fri Apr 17, 2020 10:58 am
Forum: General discussion
Topic: Memory Bandwidth of the Pi 4B
Replies: 49
Views: 2741

Re: Memory Bandwidth of the Pi 4B

I thought "contention" as well. But then I could not make any sense out of it. If the job is memory bandwidth limited I'd expect it to go up a bit with cores and then saturate as the memory bandwidth is consumed. As seen in the graphs for the other machines. As Amdahl's Law suggests. But then we th...
by Technocolour
Fri Apr 17, 2020 8:37 am
Forum: General discussion
Topic: Memory Bandwidth of the Pi 4B
Replies: 49
Views: 2741

Re: Memory Bandwidth of the Pi 4B

Thank you for your effort with the data, everyone! :)

It's interesting.
by Technocolour
Tue Apr 14, 2020 8:49 am
Forum: General discussion
Topic: OctoPi consultation
Replies: 13
Views: 591

Re: OctoPi consultation

It is ok to be wrong about things. It's the first step towards learning something new.
by Technocolour
Mon Apr 06, 2020 2:05 pm
Forum: General discussion
Topic: New 2711 datasheet available
Replies: 32
Views: 2080

Re: New 2711 datasheet available

It seems like it is the git pdf viewer that makes my Chromium misbehave.

This time it shut down Chromium after a while. (The work win 10 PC works fine with it now though)
by Technocolour
Mon Apr 06, 2020 1:57 pm
Forum: General discussion
Topic: New 2711 datasheet available
Replies: 32
Views: 2080

Re: New 2711 datasheet available

Going to the (previously) linked Github-page with my Pi4 4GB was fine. I clicked the link to get the .pdf, once the download was complete Chromium and my mouse froze for a while. Once the Pi was unfrozen (I jut left it for a while, being busy with work), opening the pdf worked perfectly fine for me....
by Technocolour
Mon Apr 06, 2020 11:11 am
Forum: General discussion
Topic: New 2711 datasheet available
Replies: 32
Views: 2080

Re: New 2711 datasheet available

Nice! Thanks. :)
by Technocolour
Thu Apr 02, 2020 3:52 pm
Forum: General discussion
Topic: New software is slow on my Pi2
Replies: 17
Views: 597

Re: New software is slow on my Pi2

Aesthetic preferences aside. (Thonny in dark mode looks just fine IMO) Typing idle into the "Add / Remove software" application yields: IDLE is an Integrated Development Environment for Python. IDLE is written using Tkinter and therefore quite platform-independent. This package is a dependency packa...
by Technocolour
Tue Mar 24, 2020 4:41 pm
Forum: General discussion
Topic: Raspberry Pi3 A+ with only 250mb of ram
Replies: 13
Views: 592

Re: Raspberry Pi3 A+ with only 250mb of ram

Pictures and info here, https://www.raspberrypi.org/products/ The above links didn't work for me? Assuming you meant those I posted: that's somewhat odd, esp. as my website is (also) hosted by Mythic Beasts (albeit probably on a different server) ... Trev. I just tried to click them, they worked fi...
by Technocolour
Tue Mar 24, 2020 10:24 am
Forum: General discussion
Topic: Why isn't my dc motor spinning?
Replies: 17
Views: 627

Re: Why isn't my dc motor spinning?

Just remember to make sure that the L293D isn't getting too hot, once you get things up and running like you want.
by Technocolour
Thu Mar 19, 2020 6:33 pm
Forum: General discussion
Topic: Raspberry PI, LTE and SIM CARD, MQTT, SixFab
Replies: 1
Views: 104

Re: Raspberry PI, LTE and SIM CARD, MQTT, SixFab

Hello and welcome to the forums! Have you talked to your professor, or any of the assistants, or what about your peers? Have you contacted the relevant companies? And when you did so, did you give them a clear explanation as to what you're doing and what you're expecting to happen and what actually ...
by Technocolour
Thu Mar 19, 2020 5:15 pm
Forum: General discussion
Topic: Cheap raspberry pi 4b with 4gb of ram everywhere
Replies: 22
Views: 1493

Re: Cheap raspberry pi 4b with 4gb of ram everywhere

From eBay? There are multiple options as to why these pop up I guess. From the dodgy (I'm sure you, dear reader, can dream up a couple of options) to some project being cancelled and the company who bought them just want to unload assets without too much of an headache, with the world being what it ...
by Technocolour
Sun Mar 15, 2020 8:44 pm
Forum: General discussion
Topic: So, what's the big new thing for this year's Pi Day (8th anniversary) ?
Replies: 130
Views: 7759

Re: So, what's the big new thing for this year's Pi Day (8th anniversary) ?

No new Pi arrived. I have a confession to make. I'm going to be hiding out in my bunker with a couple of newly arrived Nvidia Jetson Nanos. We had planned using Pi for our latest installations but others on the team insisted on having a camera and some accelerated ANN capability. I know nothing of ...
by Technocolour
Fri Mar 13, 2020 1:12 pm
Forum: General discussion
Topic: Why USB-C ?
Replies: 33
Views: 1739

Re: Why USB-C ?

Increased functionality. From the obvious (USB) to being able to power it through a laptop. The world of barrel jacks is a big non standard jungle, people would blow up thier Pis unless you increased the cost of the power section of the pi, for just about no really good reason. After the resistor fi...
by Technocolour
Sat Mar 07, 2020 4:01 pm
Forum: General discussion
Topic: pi 4 proc info
Replies: 15
Views: 658

Re: pi 4 proc info

What search terms did you use that didn't net you any results, OP?

I tried four or so variations ("rpi4 cpu wrong", "rpi4 processor wrong type", "rpi4 cpuinfo wrong", "rpi4 wrong model") and they all lead me right?
by Technocolour
Thu Mar 05, 2020 11:00 am
Forum: General discussion
Topic: So, what's the big new thing for this year's Pi Day (8th anniversary) ?
Replies: 130
Views: 7759

Re: So, what's the big new thing for this year's Pi Day (8th anniversary) ?

I had the privilege of meeting Eben Upton at the 2/29/2020 Raspberry Pi celebration event at the Tustin Micro Center in Southern California. Potato video recording of part of presentation: https://www.facebook.com/MicroCenter/posts As for hardware news, besides the price cut for the 2GB, Eben did c...
by Technocolour
Mon Mar 02, 2020 5:38 pm
Forum: General discussion
Topic: RPi4/4GB Freezes Frequently PLEASE help...
Replies: 15
Views: 1053

Re: RPi4/4GB Freezes Frequently PLEASE help...

@OP Ignore the below, unless you like random unrelated tales. I still, unironically, like the "high powered radar", tilt. No matter what the true error cause may be. It reminds me of a case were cellphones stopped working in hospitals. The reason? The MEMS clock had helium, leaked from the MRI machi...
by Technocolour
Mon Mar 02, 2020 5:30 am
Forum: General discussion
Topic: Pi Zero to precisely control peltier temp?
Replies: 13
Views: 716

Re: Pi Zero to precisely control peltier temp?

How are you going to measure temperature that accurately? Few things measure temperature to +/- 0.05°C and on top of that you want some margin. Then once you have equipment to measure that accurately (taking into account all of your noise sources like heat seaping in through the leads, affecting you...
by Technocolour
Sat Feb 29, 2020 8:16 pm
Forum: General discussion
Topic: Which Raspberry Pi to buy?
Replies: 21
Views: 1143

Re: Which Raspberry Pi to buy?

Our OP said "sending analog data out at 1ns intervals" I take that as meaning 1 giga samples per second. So, 8Gbits per second for 8 bit samples. This is not reasible. Triggering blindness is a thing, as is signal representation (is it a stable sine wave you're after?). And so on. That's far from m...

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