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by drgeoff
Thu Jan 18, 2018 12:20 am
Forum: Troubleshooting
Topic: Raspberry pi 3 power up problem
Replies: 3
Views: 110

Re: Raspberry pi 3 power up problem

Read the "not booting" sticky post. Then If still not working, buy another one/
by drgeoff
Tue Jan 16, 2018 2:14 pm
Forum: Off topic discussion
Topic: [Solved] dns on Win10 using mobile WiFi (UK)
Replies: 2
Views: 167

Re: dns on Win10 using mobile WiFi (UK)

If each RPi has a fixed IP address (either static on the RPi itself or always given the same one by the DHCP server) you can use the hosts file in Windows to associate a name with an IP address. Search the net for details..
by drgeoff
Tue Jan 16, 2018 8:46 am
Forum: Beginners
Topic: USB Communication between Pi and external device
Replies: 7
Views: 180

Re: USB Communication between Pi and external device

If the light meter has a USB port for connecting to a USB port on a PC, then yes you can instead connect it to a USB port on a RPI. That will be "safe" in the hardware sense. Whether it will work then depends on software.
by drgeoff
Mon Jan 15, 2018 5:42 pm
Forum: Networking and servers
Topic: Bringing the Raspberry Pi to PSTN or mobile telecom communication world with Asterisk
Replies: 2
Views: 109

Re: Bringing the Raspberry Pi to PSTN or mobile telecom communication world with Asterisk

I see nothing to suggest that the PSTN module has been submitted for, never mind passed, ETSI TBR 21 - the requirements for any apparatus directly connected to telephone lines in most European countries. Ditto FCC Part 68 Rules. I expect there are equivalents applicable in most countries of the world.
by drgeoff
Sun Jan 14, 2018 10:13 pm
Forum: Graphics, sound and multimedia
Topic: HDMI and Composite simultaneous video
Replies: 3
Views: 144

Re: HDMI and Composite simultaneous video

carldani wrote:
Sun Jan 14, 2018 4:27 pm
Given that at least parts of the hardware changed since the original Pi 2 B, I am somewhat hopeful to get a positive result.
The video part of all RPi models released to date is the same.
by drgeoff
Sun Jan 14, 2018 9:40 am
Forum: Networking and servers
Topic: Is it worth getting a better RPI for a vpn server?
Replies: 7
Views: 271

Re: Is it worth getting a better RPI for a vpn server?

vascobrissos14 wrote:
Sun Jan 14, 2018 12:01 am
I wanted to make a VPN server for myself and my friends since we don't have acess to some websites at our school and this way, we can get acess to all of them (I think)
If certain websites are deliberately blocked I doubt the purpose is to test your ability to overcome the blocking.
by drgeoff
Sun Jan 14, 2018 9:32 am
Forum: Troubleshooting
Topic: Can't SSH into Pi Zero (headless)
Replies: 8
Views: 412

Re: Can't SSH into Pi Zero (headless)

I'm having the same issue with a Zero W. I do have Bonjour installed and when I tried to ping it with the above command line in windows 10 I get: C:\WINDOWS\system32>ping raspberrypi.local Pinging raspberrypi.local [198.105.254.24] with 32 bytes of data: Request timed out. Request timed out. Reques...
by drgeoff
Sun Jan 14, 2018 9:27 am
Forum: Beginners
Topic: accessing LAN NAS by name not IP Address
Replies: 20
Views: 334

Re: accessing LAN NAS by name not IP Address

brianharding wrote:
Sun Jan 14, 2018 7:43 am
The IP address assigned to the nas isn’t a static one
Is there a good reason for that? Set the DHCP server (on your router?) to always give it the same address.
by drgeoff
Fri Jan 12, 2018 7:17 pm
Forum: Troubleshooting
Topic: Low voltage on Pi3 pins
Replies: 2
Views: 81

Re: Low voltage on Pi3 pins

Suspect your DMM. Maybe as simple as needing a new battery in it.
by drgeoff
Fri Jan 12, 2018 9:23 am
Forum: Troubleshooting
Topic: HDMI Ground Interference
Replies: 3
Views: 102

Re: HDMI Ground Interference

Without seeing how you have everything wired up, no-one can be sure what the cause is. However a first guess is that you don't have a ground connection between the ADC and the RPi.
by drgeoff
Tue Jan 09, 2018 9:37 am
Forum: Media centres
Topic: pi zero hdmi connector.
Replies: 12
Views: 385

Re: pi zero hdmi connector.

It does not exist and there is no way that you can reliably get the needed 19 or so connections without either soldering or plugging into the mini-HDMI socket.

There are mini-HDMI to HDMI adaptors. Put "mini-hdmi adapter" into any search engine.
by drgeoff
Tue Jan 09, 2018 9:29 am
Forum: Graphics, sound and multimedia
Topic: Vintage Analogue Mini TV play films through raspberry pi
Replies: 1
Views: 98

Re: Vintage Analogue Mini TV play films through raspberry pi

That is almost trivial if the TV has AV input sockets.

HOWEVER, even a small CRT TV has several kilovolts inside. Unless you know what you are doing, do not go inside.
by drgeoff
Mon Jan 08, 2018 11:36 pm
Forum: Off topic discussion
Topic: Silicon on RP zero w PCB
Replies: 8
Views: 594

Re: Silicon on RP zero w PCB

"just silicon pieces"? or are they perhaps potato chips to you? :mrgreen: you are probably (because you don't identify *which* raspberry PI you mean) talking about the LAN9512 USB hub chip with built in USB-Ethernet controller, and quite possibly the switching power converter that creates 3.3V and ...
by drgeoff
Mon Jan 08, 2018 6:29 pm
Forum: Troubleshooting
Topic: Raspberry Pi 3 rainbow screen with lightening bolt
Replies: 11
Views: 324

Re: Raspberry Pi 3 rainbow screen with lightening bolt

If you really have 5 volts +/- 5% at the board but only 1.8 volts instead of 3.3 then I cannot see how the PSU or cable could be causing that. Looks like the 3.3 volts regulator is faulty or its load is drawing excessive current.
by drgeoff
Mon Jan 08, 2018 2:03 pm
Forum: Networking and servers
Topic: Resolving Domain Names over VPN
Replies: 5
Views: 174

Re: Resolving Domain Names over VPN

Not a RPi specific issue.

You expect Google's DNS to know the names and private IP addresses of the hosts on your LAN?

Add, or change one of those two DNS entries to, a DNS on your LAN which does know those things.
by drgeoff
Mon Jan 08, 2018 10:09 am
Forum: Media centres
Topic: Samsung Universal Remote CEC with RPi3 OSMC
Replies: 6
Views: 2202

Re: Samsung Universal Remote CEC with RPi3 OSMC

Hi, I have this problem too. The TV only allows for a set number of device types. It allows you to test each device but none of them seem to work with KODI. Has anyone got this to work with samsung uhd tv's? If by "same problem" you mean that you are trying to find the correct "device type" for the...
by drgeoff
Sun Jan 07, 2018 10:37 pm
Forum: Graphics, sound and multimedia
Topic: Serial screen for Raspberry Pi 3
Replies: 4
Views: 241

Re: Serial screen for Raspberry Pi 3

http://www.spotpear.com/download/LCD/uart/UART-LCD22/Document/UART-Command-Introduction-EN.docx Technically possible but will require a custom software driver. Also it appears to have a 5 volt signal interface cf the 3.3 volt levels of the RPi. The resolution is only 176 by 220 which is not very use...
by drgeoff
Sun Jan 07, 2018 9:56 am
Forum: Troubleshooting
Topic: SD card corrupt
Replies: 12
Views: 347

Re: SD card corrupt

I used the gparted and could not get it to work. Unless i am using incorrectly. ...... https://gparted.org/display-doc.php?name=help-manual I used that and some youtube videos to guide me. The same problem still exists such as it only shows the 30 mb when it should be 32 gb. Even creating a new par...
by drgeoff
Sun Jan 07, 2018 9:48 am
Forum: Graphics, sound and multimedia
Topic: [GUIDE] Chromecast streaming from raspberry pi
Replies: 24
Views: 77224

Re: [GUIDE] Chromecast streaming from raspberry pi

Yes, you do appear as you feared. :)

The Chromecast is outputting video and audio to the TV's HDMI input. Why would the RPi need to be connected to the TV?
by drgeoff
Sun Jan 07, 2018 9:39 am
Forum: Beginners
Topic: Use SD card from Model B in Pi3?
Replies: 8
Views: 257

Re: Use SD card from Model B in Pi3?

Original RPis have a full size SD card slot whereas RPI3s have a mico-SD one. Unless the card is a micro-SD one, the answer is clearly no. Newer models of RPis (and even later production runs of the same model) usually require some updated files . These are always backwards compatible. While the car...
by drgeoff
Sat Jan 06, 2018 6:04 pm
Forum: Beginners
Topic: telnet command not found
Replies: 7
Views: 210

Re: telnet command not found

I've installed telnet sudo apt-get install telnetd It installed fine. I've run: sudo /etc/init.d/openbsd-inetd.service [ ok ] Restarting openbsd-inetd (via systemctl): openbsd-inetd.service. sudo telnet 192.168.1.254 sudo: telnet: command not found man telnet No manual entry for telnet sudo apt-get...
by drgeoff
Fri Jan 05, 2018 10:57 pm
Forum: Beginners
Topic: Maximum size of boot drive
Replies: 3
Views: 144

Re: Maximum size of boot drive

Yes a 128 Gbyte card will work. You can load an OS image file to that without any problem. If you want to use NOOBS you must first change the card's format from exFAT to FAT32. See viewtopic.php?f=91&t=83372&p=651745#p677748
by drgeoff
Fri Jan 05, 2018 4:25 pm
Forum: Troubleshooting
Topic: RPi3: Cannot get any video output only on certain TVs
Replies: 3
Views: 121

Re: RPi3: Cannot get any video output only on certain TVs

Try this. Connect the RPi to one of the TVs that it does work with. Boot the RPi and confirm video out. Keeping the RPi powered up, unplug the HDMI lead from the TV and plug it into a TV that didn't work before. Not a solution but if it works it shows you that the combination can work and you just n...
by drgeoff
Fri Jan 05, 2018 4:17 pm
Forum: Beginners
Topic: SPDT switch to select voltage for fan?
Replies: 1
Views: 65

Re: SPDT switch to select voltage for fan?

Yes.

Use a small low power fan. The 3.3 volt point on the GPIO header is unable to supply as much current as the 5 volt point.
by drgeoff
Thu Jan 04, 2018 11:40 pm
Forum: Graphics, sound and multimedia
Topic: Serial screen for Raspberry Pi 3
Replies: 4
Views: 241

Re: Serial screen for Raspberry Pi 3

I suspect that your "serial screen" accepts only ASCII characters. If so you will only have a command line console, not the full desktop GUI. Abd what type of interface does the screen have? If it is true RS232 or 5 volt TTL levels, you cannot connect it directly to the RPi GPIO serial port as that ...

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