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by cryptohunter
Thu May 11, 2017 10:18 am
Forum: Off topic discussion
Topic: Recommendations for a good, but cheap, multimeter
Replies: 28
Views: 14218

Re: Recommendations for a good, but cheap, multimeter

jadro wrote:I use this for a year and it is good to measure anything and it is cheap and precize.

http://www.ebay.com/itm/LCD-Auto-Range- ... SwoudW8mdU

Jadro
Thank you Jadro :-)
by cryptohunter
Thu May 11, 2017 9:17 am
Forum: Off topic discussion
Topic: Recommendations for a good, but cheap, multimeter
Replies: 28
Views: 14218

Recommendations for a good, but cheap, multimeter

Hi there, It's become increasingly clear to me, why electronics enthusiasts generally own a multi-meter. I would be very grateful if you might suggest a good, cheap multimeter for me to purchase, with the usual Amps, milliamps, volts, watts readings. Settings for AC or DC. ... and measurement of thi...
by cryptohunter
Sat May 06, 2017 3:29 am
Forum: Off topic discussion
Topic: The best _free_ electronic circuit simulation tool
Replies: 8
Views: 7113

Re: The best _free_ electronic circuit simulation tool

Not only that running LTSpice under wine is much easier than firing up a VM. I generally have an icon on my desktop that runs LTSpice, you'd never know it was not a Linux application. I have no idea what wineHQ is. I just "apt-get install wine" and go. You probably don't need wineHQ if you have win...
by cryptohunter
Sat May 06, 2017 2:22 am
Forum: Off topic discussion
Topic: The best _free_ electronic circuit simulation tool
Replies: 8
Views: 7113

Re: The best _free_ electronic circuit simulation tool

.... I'm on linux ... but have no wine... though i guess i could install a (scabby) windows OS under a virtual machine.. Installing Wine is much easier than messing with a VM. Well... i found this page that discusses installing LTSpice under wineHQ. So i'm currently installing that... so.. thanks f...
by cryptohunter
Sat May 06, 2017 1:02 am
Forum: Off topic discussion
Topic: The best _free_ electronic circuit simulation tool
Replies: 8
Views: 7113

Re: The best _free_ electronic circuit simulation tool

I have not tried many circuit simulators. Mostly because I found LTSpice from Linear Technology: http://www.linear.com/designtools/software/ It's free, amazingly easy to use and pretty fast. Sadly it's only available for Windows and Mac but it runs perfectly under Wine on a Linux box. Sadly also th...
by cryptohunter
Sat May 06, 2017 12:16 am
Forum: Off topic discussion
Topic: The best _free_ electronic circuit simulation tool
Replies: 8
Views: 7113

Re: The best _free_ electronic circuit simulation tool

This page looks like it supplies the answer to my question: https://www.element14.com/community/groups/development-tools/blog/2016/09/03/best-free-online-circuit-simulator It supplies these prospective answers: EasyEDA circuit simulator Circuit Sims DcAcLab everyCircuit.com (but is app is _not_ free...
by cryptohunter
Fri May 05, 2017 11:43 pm
Forum: Off topic discussion
Topic: The best _free_ electronic circuit simulation tool
Replies: 8
Views: 7113

The best _free_ electronic circuit simulation tool

Hello, Do you have any suggestions for a good, free, electronic circuit simulation tool. I have just wasted some hours messing around with everycircuit (which is a simulation tool requiring the chrome browser).... ...which turned out to have a 1 day trial period. So .. if anyone has suggestions for ...
by cryptohunter
Wed Apr 26, 2017 3:17 pm
Forum: General discussion
Topic: Daisy Chaining Network Switches Question
Replies: 14
Views: 2058

Re: Daisy Chaining Network Switches Question

In the last 13 years the vast majority of new switch models released into the market have this STP algorithm by default. Of-course, its possible that some 'unbranded' (inexpensive) switches don't comply with the industry agreed standards. The Spanning Tree Protocol was originally intended to for us...
by cryptohunter
Mon Apr 24, 2017 3:36 am
Forum: General discussion
Topic: Daisy Chaining Network Switches Question
Replies: 14
Views: 2058

Re: Daisy Chaining Network Switches Question

Having the Router connected to Switch A and C, then Switch A connected to B, and Switch B connected to C results in a loop in normal circumstances. This leads to 1) confused mac-port tables, on switch B the mac for the router will appear on both the port to switch A and switch C and 2) packets trav...
by cryptohunter
Sat Apr 22, 2017 8:52 pm
Forum: General discussion
Topic: Daisy Chaining Network Switches Question
Replies: 14
Views: 2058

Re: Daisy Chaining Network Switches Question

Can be done. With modern, 1GB switches, you do not need a x-over cable. This. I have three switches daisy-chained around my house with various devices attached using standard cables. Hi rpdom, I have a follow up question about your 3 Switch daisy chain. I presume that your LAN is connected to the i...
by cryptohunter
Sat Apr 22, 2017 8:24 pm
Forum: General discussion
Topic: Daisy Chaining Network Switches Question
Replies: 14
Views: 2058

Re: Daisy Chaining Network Switches Question

Can be done. With modern, 1GB switches, you do not need a x-over cable. This. I have three switches daisy-chained around my house with various devices attached using standard cables. Thanks rpdom, I appreciate your help. My initial doubt about this... stemmed from trying to imagine what the DHCP Ne...
by cryptohunter
Sat Apr 22, 2017 8:10 pm
Forum: General discussion
Topic: Daisy Chaining Network Switches Question
Replies: 14
Views: 2058

Re: Daisy Chaining Network Switches Question

Ernst wrote:Can be done. With modern, 1GB switches, you do not need a x-over cable.
Danke Schoen :)
by cryptohunter
Sat Apr 22, 2017 7:28 pm
Forum: General discussion
Topic: Daisy Chaining Network Switches Question
Replies: 14
Views: 2058

Daisy Chaining Network Switches Question

Hi there, Suppose you wanted to connect 10 RPs together into a LAN. Imagine that you happen to have, 2 Network Switches: Switch-A and Switch-B. These switches are identical, they are 8 port switches. Clearly, there are more RPs than there are ports on any one Switch. So my question is: Can I daisy-c...
by cryptohunter
Mon Apr 17, 2017 7:23 pm
Forum: General discussion
Topic: How to plug in a PCI card into a Pi ?
Replies: 9
Views: 8102

Re: How to plug in a PCI card into a Pi ?

https://www.linaro.org/blog/core-dump/accelerated-aes-for-the-arm64-linux-kernel/ AES acceleration is optional in ARMv8 and not present in the Pi3. NEON can be used as stopgap measure. Furthermore "AES-NI" is the name of AES acceleration on the x64 platform (Intel/AMD) only. The name for ARMv8 is l...
by cryptohunter
Mon Apr 17, 2017 5:52 am
Forum: General discussion
Topic: How to plug in a PCI card into a Pi ?
Replies: 9
Views: 8102

Re: How to plug in a PCI card into a Pi ?

Well...yes...the BC2837 used in the Pi3B and Pi2B2 is a quad-core Cortex-A53, so there you go. Now all you need to do is either find a suitable package, or learn enough ARMv8-A assembler to use that feature. Wont Apache magically make use of this feature ? Or ... maybe I need to recompile Apache wh...
by cryptohunter
Mon Apr 17, 2017 4:16 am
Forum: General discussion
Topic: How to plug in a PCI card into a Pi ?
Replies: 9
Views: 8102

Re: How to plug in a PCI card into a Pi ?

Well...yes...the BC2837 used in the Pi3B and Pi2B2 is a quad-core Cortex-A53, so there you go. Now all you need to do is either find a suitable package, or learn enough ARMv8-A assembler to use that feature. Wont Apache magically make use of this feature ? Or ... maybe I need to recompile Apache wh...
by cryptohunter
Mon Apr 17, 2017 3:43 am
Forum: General discussion
Topic: How to plug in a PCI card into a Pi ?
Replies: 9
Views: 8102

Re: How to plug in a PCI card into a Pi ?

What specifics did you have in mind? There may be an alternative. I was specifically thinking about a PCI openSSL accelerator card. "What a 'bazzin' idea!".... i thought... after reading this page: https://en.wikipedia.org/wiki/SSL_acceleration What's it for ? When you want to (vertically) scale yo...
by cryptohunter
Mon Apr 17, 2017 2:31 am
Forum: General discussion
Topic: How to plug in a PCI card into a Pi ?
Replies: 9
Views: 8102

How to plug in a PCI card into a Pi ?

Hi there, There are clearly no PCI slots in a Pi. But i was wondering: -- Is there some species of Pi Hat that might take a PCI card ? -- Is there some USB to PCI adaptor that might work on a Pi ? There are lots of different types of card, for everything from sound and graphics and TV and specialist...
by cryptohunter
Wed Apr 12, 2017 2:05 am
Forum: General discussion
Topic: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be found
Replies: 13
Views: 2463

Re: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be f

The evidence from the experience of people.... on this forum.... is that the PiDrive, runs no faster than microSD card. I think it's reasonable for a potential purchaser of one of these drives to ask pertinent questions about the performance of the PiDrive relative to the performance of a SanDisk Ex...
by cryptohunter
Wed Apr 12, 2017 12:27 am
Forum: General discussion
Topic: Tech Specs for PiDrive 314GB and 1TB.... nowhere to be found
Replies: 13
Views: 2463

Tech Specs for PiDrive 314GB and 1TB.... nowhere to be found

Let's imagine you're interested in comparing the data write/read speeds of, say, PiDrive 314 vs Samsung Fit vs Sandisc Extreme Plus (et al) You might think it would be an easy matter to just look carefully at the existing marketing pages and find the link that says 'tech spec'.. or something like th...
by cryptohunter
Sun Apr 09, 2017 3:52 pm
Forum: Raspbian
Topic: Raspbian Jessie (64bit) for RPi3?
Replies: 145
Views: 135269

Re: Raspbian Jessie (64bit) for RPi3?

where did you get 64-bit version of Raspbian? I am just curious. Haven't found anything Its not yet available. You can run a cut down 64-bit Fedora from here: https://www.kraxel.org/repos/rpi2/images/ They are minimal to say the least; the Fedora one (arm64-rpi3-f24...) is best as it has a package ...
by cryptohunter
Sat Apr 08, 2017 7:17 pm
Forum: General discussion
Topic: Broadcom BCM2837 SoC & RP2 v1.2
Replies: 10
Views: 1876

Re: Broadcom BCM2837 SoC & RP2 v1.2

Fedora / CentOS AArch64: https://www.raspberrypi.org/forums/viewtopic.php?f=51&t=151274 ArchLinuxArm has an experimental build of AArch64 ArchLinuxArm: https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-3 There are various posts relating to Arm64 Raspbian / Debian somewhere in this foru...
by cryptohunter
Sat Apr 08, 2017 7:12 pm
Forum: Raspbian
Topic: Raspbian Jessie (64bit) for RPi3?
Replies: 145
Views: 135269

Re: Raspbian Jessie (64bit) for RPi3?

on other platforms there is no speed advantage in 64 bit code Oh, never mind. Then I must live in some parallel universe :-) Anyway, just found article relevant to this topic http://www.cnx-software.com/2016/03/01/64-bit-arm-aarch64-instructions-boost-performance-by-15-to-30-compared-to-32-bit-arm-...
by cryptohunter
Sat Apr 08, 2017 7:05 pm
Forum: General discussion
Topic: Broadcom BCM2837 SoC & RP2 v1.2
Replies: 10
Views: 1876

Re: Broadcom BCM2837 SoC & RP2 v1.2

There are no known plans to shift Raspbian to 64-bit, for a number of reasons. Chief among them being that it would break backwards compatibility (think: develop on a Pi3B, but run on a Pi Zero, which can't do 64-bit). FYI...there is one other implication to having the BCM2837 on the Pi2B2. It mean...
by cryptohunter
Sat Apr 08, 2017 5:12 pm
Forum: General discussion
Topic: Broadcom BCM2837 SoC & RP2 v1.2
Replies: 10
Views: 1876

Re: Broadcom BCM2837 SoC & RP2 v1.2

rpdom wrote:
cryptohunter wrote:My simple question is: does that mean the RP2 is now 64 bit ?... Just like the RP3 ?
Yes, but like the Pi3 it is running in legacy 32 bit mode in Raspbian.
Oh Really. How interesting.
Do you know if there is a project to upgrade Raspbian to 64 bit ?

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