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Old 10-31-2019, 08:04 PM   #301
Notebook
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Understood.
Luckily we never had to get to reflow-ovens level, wasn't that kind of maintenance.
I didn't mind fine pitch ICs, my hands were steadier then...

I do remember when magnetic core memory board in one of the studio lighting equipment was updated by a ...RAM CHIP!
It looked quite lonely sat in the middle of an 8" square circuit board. Whish I'd kept the magnetic core board.
Progress.

Good grief, there is a sales brochure for it.

http://www.theatrecrafts.com/archive...lebrochure.pdf

Last edited by Notebook; 10-31-2019 at 08:14 PM.
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Old 11-01-2019, 09:13 AM   #302
Marijn
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Quote:
Originally Posted by Notebook View Post
 Next kit is a 6 digit Nixie tube clock.
Those look cool. Some of the kits are quite expensive as well.

Are Nixie tubes the same as vacuum tubes?

https://www.tindie.com/search/?q=nixie&p=1
https://www.tindie.com/products/davi...clock-kitwifi/

---------- Post added at 10:13 AM ---------- Previous post was at 09:58 AM ----------

Quote:
Originally Posted by Urwumpe View Post
 The main feasibility question is for example, could a SoC drive a sail winch servo?
A quick search led me to the Arduino site which says
Quote:
Note that servos draw considerable power, so if you need to drive more than one or two, you'll probably need to power them from a separate supply
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Old 11-01-2019, 09:44 AM   #303
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Yes, they are expensive. I'll buy one or two a year and that about it. Running out of novelties now, so this could be the last for awhile.

Re Nixies, I don't really know much about them except they need 180V.
Wiki says its not a thermionic device, so not a vacuum tube in the Marconi sense.
But...
https://en.wikipedia.org/wiki/Nixie_tube

We used a lot of them as "station-clock" where I worked, some early time-code edit suites also used them before 7-segment LED came out.


They have a dangerous side-effect. If you stare too long at them you start to see the individual digits move back and forth. Bit like staring at windscreen wipers to see if they are flipping over...

Last edited by Notebook; 11-01-2019 at 09:48 AM. Reason: sp
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Old 01-07-2020, 04:33 AM   #304
Artlav
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So, anyone got a Pi 4 ?
If you do, would you mind running some of my benchmarks on it?

The thing is kinda pricey around here, and i'm trying to resist the temptation of buying *yet another Pi* just to see what it can do and then drop it into a box of maybe later.

https://orbides.org/etc/bench_rpi4.tar.gz
Not sure if it's 32bit or 64bit, so i compiled for both.
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Old 01-07-2020, 05:57 AM   #305
llarian
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Artlav, I have an RPi4 4Gb ram. I run it in a black aluminum case with active cooling (two small fans). I can't promise when I could run your benchmarks but I'll take a shot at it. Do you want that run with or without the casing?

Here are the technical specs for the unit I have:

SoC: Broadcom BCM2711B0 quad-core A72 (ARMv8-A) 64-bit @ 1.5GHz.
GPU: Broadcom VideoCore VI.
Networking: 2.4 GHz and 5 GHz 802.11b/g/n/ac wireless LAN.
RAM: 4GB LPDDR4 SDRAM.
Bluetooth: Bluetooth 5.0, Bluetooth Low Energy (BLE)
GPIO: 40-pin GPIO header, populated.
Storage: microSD.

Last edited by llarian; 01-07-2020 at 06:00 AM.
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Old 01-07-2020, 06:20 AM   #306
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With the case, i guess. The benchmark is quick enough that cooling shouldn't matter that much, unless the thing thermal throttles within seconds as some reviews suggested.
Is the OS 64bit or 32bit?
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Old 01-07-2020, 07:35 AM   #307
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I'll have to check again on the OS. I have had no problem with thermal throttling in this configuration but then I have not been pushing it too hard.

Edit: What I am using presently is the 32 bit OS. I haven't tried the 64 bit that is available but there should be no problem in installing it on another chip and giving it a try.

2nd edit: Artlav, today is your Christmas Day. Have a Happy Christmas.

Last edited by llarian; 01-07-2020 at 07:52 AM.
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