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by wolf.z
Thu Sep 27, 2018 11:23 am
Forum: General discussion
Topic: Two Pi DNS Servers
Replies: 2
Views: 608

Re: Two Pi DNS Servers

Probably it is better to ask the Pi-hole community. But since pi-hole uses dnsmasq to my knowledge, your idea might be about clustering dnsmasq and use virtual IP addresses? Further, I won't proceed with an additional DHCP server - isc. May this discussion help? http://lists.thekelleys.org.uk/piperm...
by wolf.z
Thu Sep 27, 2018 8:51 am
Forum: General discussion
Topic: In search of reliable FCC-certified USB Wi-Fi adapter with removable antenna
Replies: 21
Views: 2084

Re: In search of reliable FCC-certified USB Wi-Fi adapter with removable antenna

Sorry for having spread wrong information. The WL 0151A uses a RTL8188EUS chip from Realtek. My WIFI sticks are the WL 0151 V.2 using Ralink RT5370 chip. So the Ralink is the good one I was recommending. I cannot judge the Realtek chip. Sorry Cheap, rock-steady operation with my Pi 2B, detachable an...
by wolf.z
Tue Sep 25, 2018 7:44 pm
Forum: Automation, sensing and robotics
Topic: Will gps with raspberry work inside home?
Replies: 9
Views: 1469

Re: Will gps with raspberry work inside home?

Will gps with raspberry work inside home? Raspberry: yes. GPS: no. Which would you prefer cheap and good for a gps locating robot? none, not even a very expensive one. Like to send to X coordinates and stop and return to initial coordinate Y Will have accuracy? There has happened much effort on how...
by wolf.z
Tue Sep 25, 2018 7:14 am
Forum: Graphics, sound and multimedia
Topic: [HELP] Connecting a guitar amplifier to a Rasp pi
Replies: 6
Views: 1622

Re: [HELP] Connecting a guitar amplifier to a Rasp pi

... I am working on a project that connects my electric guitar > Rasp pi > (bluetooth) Android device / android app ...However I want to increase the ... speed of the way it gets the correct frequency to be translated into notes... ...it is connected via the USB mic, I modified the USB mic port to ...
by wolf.z
Mon Sep 24, 2018 8:51 pm
Forum: General discussion
Topic: DIY POE?
Replies: 40
Views: 6816

Re: DIY POE?

Blimey, I was hoping this would be a lot easier. I’m planning a pi cluster (have a small one running quite nicely at the mo) and thought this would be a good way to cut out usb power hubs and cables, but it doesn’t seem the technology has quite caught up with my idea. I think i’ll stick with the £1...
by wolf.z
Mon Sep 24, 2018 8:45 pm
Forum: General discussion
Topic: DIY POE?
Replies: 40
Views: 6816

Re: DIY POE?

For longer distances and higher current draw you have a problem of voltage drop due to cable resistance. Agreed. You could always use a nominal +5V buck DC-DC convertor at the power-sending end with an adjustable output (as jabuzzard suggested). Then adjust the source voltage when feeding the Pi th...
by wolf.z
Fri Sep 21, 2018 12:06 pm
Forum: Troubleshooting
Topic: How to change wifi 802.11g to 802.11b modes
Replies: 24
Views: 8244

Re: How to change wifi 802.11g to 802.11b modes

Well, the entire post deals with a lot of confusion. This is due to limited english capabilities of the thread starter and minor knowledge on how wireless LAN standards behave physically. First of all, one should try to understand the fundamental differences of all that 802.11-plus-letter(s) standar...
by wolf.z
Wed Sep 19, 2018 5:46 pm
Forum: Networking and servers
Topic: Ethernet to Wifi Bridge
Replies: 7
Views: 3095

Re: Ethernet to Wifi Bridge

Dear KISchlitzohr, why not ask the author of the tutorial? The scripts is a thing, customized to a high level of "special", especially when it comes to echo "start 192.168.42.2 " >> $x as an example. You typically won't succeed with such settings. What you need is to raise a local Access Point, that...
by wolf.z
Mon Sep 17, 2018 12:43 pm
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 5380

Re: Unstable 5Ghz wifi connection on RPi 3B+

mrdone, you did the trick by investigating further, great. However, things are much more complicated when it comes to permissions of use of channels worldwide. That's why country settings and their authors respectively may fail... There are differences in channels allowed, transmit power per channel...
by wolf.z
Fri Sep 14, 2018 6:48 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 487
Views: 189571

Re: What was your first computer?

My first computer was a HP 34C scientific calculator. http://www.rskey.org/hp34c The device's potential outperformed my demand as an engineer student of telecommunications science at that time. Programming was a huge hurdle, rpn - reverse polish notation - showed to be the best in interfacing with c...
by wolf.z
Fri Sep 14, 2018 3:10 pm
Forum: Beginners
Topic: Unstable 5Ghz wifi connection on RPi 3B+
Replies: 15
Views: 5380

Re: Unstable 5Ghz wifi connection on RPi 3B+

... @ALL, I still need help with instability of 5Ghz connection. I had to run speedtest-cli 3 times to get these results, because first two times connection was lost before speedtest-cli was able to measure the speed. So, it seems that I am loosing connection roughly every minute. The systemctl log...
by wolf.z
Tue Sep 11, 2018 8:15 am
Forum: General discussion
Topic: How to dispose of broken lipo
Replies: 40
Views: 2976

Re: How to dispose of broken lipo

Another form of Litium cell that may be safer than Li-Po or Li-Ion LCB ... The LCB as well as the Li-Po is a Li-Ion battery. Do not mix up associations of common sense with Li ion=cylindrical cell and Li po=pouch cell. However, there are many approaches towards safer Li batteries. Today's safest wi...
by wolf.z
Sun Sep 09, 2018 2:45 pm
Forum: Networking and servers
Topic: Wireless Repeater
Replies: 8
Views: 1111

Re: Wireless Repeater

The missing possibility of bridging two wireless LANs is a protocol issue. IEEE 802.xx's real life implementation does not allow yet to do so. See: http://www.ieee802.org/1/files/public/d ... 09-v01.pdf Rather use routing.
by wolf.z
Sun Sep 09, 2018 1:47 pm
Forum: Deutsch
Topic: Pi Desktop auf Mac
Replies: 5
Views: 4038

Re: Pi Desktop auf Mac

Das richtige Stichwort is "RDP", Remote Desktop. Nach kurzer Suche gefunden: https://www.raspberrypi.org/forums/viewtopic.php?t=18832 11. post für den Fall mit dem Mac. 4. post für den Fall mit Windows. Hier scheint es aber massive Probleme zu geben. Ggfs. noch X11 auf dem Mac installieren. Auf dem ...
by wolf.z
Fri Sep 07, 2018 7:44 pm
Forum: General discussion
Topic: How to dispose of broken lipo
Replies: 40
Views: 2976

Re: How to dispose of broken lipo

PiGraham wrote:
Fri Sep 07, 2018 7:36 pm
...but at least some Lithium Ion batteries do contain metal that could ignite in water...
Aha, which one metal?
by wolf.z
Fri Sep 07, 2018 4:35 pm
Forum: General discussion
Topic: How to dispose of broken lipo
Replies: 40
Views: 2976

Re: How to dispose of broken lipo

On mystery and hysteria concerning lithium-ion cells. All that lithium batteries out there use different chemistry with execption for their anode, mostly made from carbon. The cathode is an oxide from varying metals. In case of a so called thermal runaway it is mostly the anode carbon burning, as th...
by wolf.z
Fri Sep 07, 2018 3:09 pm
Forum: Troubleshooting
Topic: WiFi Signal
Replies: 1
Views: 101

Re: WiFi Signal

Indeed every conductor acts as a shield for radio waves. You do not need a lead shielding. You need that for x-rays. Assuming the brownie housing is totally made from tin, you could either 1 replace one of the cabinets sides by wood or plastics 2 as you suggested, place the WIFI antenna outside the ...
by wolf.z
Thu Sep 06, 2018 6:09 am
Forum: HATs and other add-ons
Topic: PoE HAT - USB Ports not working - over-current (FIXED - New Hardware Release)
Replies: 327
Views: 96345

Re: PoE HAT - USB Ports not working - over-current

... It's not obvious what "feature" of the PoE 5V is causing the issue. Really? No, it is. The_Raven already narrowed the problem. The issue is poor design and testing. I assume, the final layout, the real PCB manufactured was never tested since too many are reporting a near no-function. Maybe a la...
by wolf.z
Wed Sep 05, 2018 2:39 am
Forum: HATs and other add-ons
Topic: PoE HAT - USB Ports not working - over-current (FIXED - New Hardware Release)
Replies: 327
Views: 96345

Re: PoE HAT - USB Ports not working - over-current

My guess is that problem lies in converter output voltage filtering, excessive noise disturbing overcurrent supervising feature of USB controller producing false "over-current" messages.... Put everything together, I suggest any kind of experiments should be done by the manufacturer. Any switching ...
by wolf.z
Tue Sep 04, 2018 6:08 am
Forum: General discussion
Topic: Raspberry Pi is a waste of time (and money).
Replies: 115
Views: 15514

Re: Raspberry Pi is a waste of time (and money).

Hmmm, I don't know, what UnHappy achieved. I reached happiness with a Pi. Just a few years ago I started to use the Raspberry. Just because of a target for the use case, a virtual plane radar application. A target, you hardly would achieve with other computers, because all the people contributing so...
by wolf.z
Mon Aug 27, 2018 2:16 pm
Forum: General discussion
Topic: Is it really true, that the RPi runs faster when booting from a good USB Stick?
Replies: 31
Views: 7103

Re: Is it really true, that the RPi runs faster when booting from a good USB Stick?

...But wait, what do you mean by "best": Fastest? Cheapest? Most reliable? Smallest? Most power efficient? Most easily available? ... The best also concerning price/value tag. In this case, I want to focus on reliability and durability, as said in my post. "The memory chips for SSD, memory cards an...
by wolf.z
Sat Aug 25, 2018 8:25 pm
Forum: General discussion
Topic: Is it really true, that the RPi runs faster when booting from a good USB Stick?
Replies: 31
Views: 7103

Re: Is it really true, that the RPi runs faster when booting from a good USB Stick?

Besides a discussion of speed of solid state memory: The memory chips for SSD, memory cards and USB sticks are almost the same with the exception of reliability and read/write durability. The best typically get into SSD, the worst get into USB sticks. When it comes to hosting an OS, I always would c...
by wolf.z
Fri Aug 24, 2018 7:11 pm
Forum: Advanced users
Topic: Unsolder wi-fi chip and antenna in RPI3
Replies: 47
Views: 4777

Re: Unsolder wi-fi chip and antenna in RPI3

... My point is that turning off the driver in the kernel does almost exactly the same thing. I doubt that. Though turning off the driver is almost the same thing in effect, re-soldering hardware is as much effort as one might think of, but... I am far from being a software expert, call me paranoid...
by wolf.z
Fri Aug 24, 2018 6:48 pm
Forum: Other projects
Topic: what to do with an old police scanner.
Replies: 11
Views: 2716

Re: what to do with an old police scanner.

...you will have to install in an FM Tuner module which will act as a second audio source. while you're at it better add a third sound source called "AUX" ... c. AUX input (from RCA jack at the back) you may add one more if you like. ... Looking forward to your progress in your build....have fun! L...
by wolf.z
Fri Aug 24, 2018 6:20 am
Forum: Automation, sensing and robotics
Topic: wind speed protocol for reed anemometer
Replies: 9
Views: 1111

Re: wind speed protocol for reed anemometer

Well I was thinking of the raw anemometer interface using a PIC and a comms interface i2c or serial to a PI Jim OK, but what kind of raw are you thinking of? Is it raw reed puls, is it just two integer for gust (max) and average? In case of the former a simple question comes into my mind: What for ...

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