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by rpdom
Sun Apr 27, 2014 3:47 pm
Forum: Beginners
Topic: I need to power 6 Pi's, what would work with my setup?
Replies: 8
Views: 1410

Re: I need to power 6 Pi's, what would work with my setup?

I use a 5 port 40W charger to run some of may Raspis. The build quality is good and, although I haven't tested this, it claims to supply 5v at up to 8A shared between the 5 USB sockets. Above 8A current limiting will cut in and the voltage will drop, but that should be enough power to run five Raspi...
by rpdom
Sun Apr 27, 2014 12:24 pm
Forum: Troubleshooting
Topic: HDMI display issues with TV
Replies: 19
Views: 3807

Re: HDMI display issues with TV

With the DVI cable you might need to put "hdmi_force_hotplug=1" in config.txt as they sometimes don't signal that there is an hdmi connection.

Also make sure that your monitor isn't DVD-A, which is VGA in disguise. It needs to support DVI-D (or DVI-I which is DVI-A plus DVI-D).
by rpdom
Sun Apr 27, 2014 7:33 am
Forum: Troubleshooting
Topic: SWT libraries
Replies: 3
Views: 6021

Re: SWT libraries

To check if the library is appropriate to the Pi, try file /home/pi/.swt/lib/linux/arm/libswt-gtk-3735.so It should return something like /home/pi/.swt/lib/linux/arm/libswt-gtk-3735.so: ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked, BuildID[sha1]=0xdf28690071a41cb7384a5edf6...
by rpdom
Sun Apr 27, 2014 7:15 am
Forum: General discussion
Topic: Configuring a NOOBS installation - download
Replies: 12
Views: 5377

Re: Configuring a NOOBS installation - download

I don't know why people bother with Noobs. The easiest way to install my OS of choice is to simply choose my OS and download it. The last one I did was Raspbian, yesterday: download, unzip, copy to SD card, done! It's the "copy to SD card" bit that was causing problems with Windows users. Also allo...
by rpdom
Sun Apr 27, 2014 7:10 am
Forum: Camera board
Topic: Powering PIs from the USB ports on another PI
Replies: 4
Views: 963

Re: Powering PIs from the USB ports on another PI

As Ivan said, No. The fuse on the input of the Pi will only allow enough current for one Pi with a camera and two low-power USB devices at most. You could make a split power cable, as suggested, or get a multi-port USB power adaptor/charger and three USB leads. I have such an adaptor which has five ...
by rpdom
Sat Apr 26, 2014 7:08 pm
Forum: Beginners
Topic: CPU running at high temp for no reason. How do I debug?
Replies: 24
Views: 3297

Re: CPU running at high temp for no reason. How do I debug?

Mine's in a Pibow case and regulalry hits 80°C+ with a small heatsink when gaming with an ambient temperature of 20°C. I'm probably going the fan route very shortly. Unless you're going to be thrashing your Pi mercilessly, the advice above seems sound enough. I'm curious. You keep saying this (a lo...
by rpdom
Sat Apr 26, 2014 6:39 pm
Forum: Beginners
Topic: CPU running at high temp for no reason. How do I debug?
Replies: 24
Views: 3297

Re: CPU running at high temp for no reason. How do I debug?

btw the region I live, the temperatures are always 35+ (usually around 37-38C). So running at this high temp would reduce life of my pi? and also would fans or heat sinks would do any good? are they actually needed? Yes, it might reduce the life of your Pi slightly. Instead of lasting 30+ years it ...
by rpdom
Sat Apr 26, 2014 4:57 pm
Forum: Off topic discussion
Topic: HDMI OK, but RCA doesn't work..
Replies: 5
Views: 1448

Re: HDMI OK, but RCA doesn't work..

The basic Pi setup was that if HDMI was connected it would be used, if not then RCA would be used. Now, if you have installed with NOOBS, it puts entries in the config.txt file to force HDMI or RCA. Look for entries like "hdmi_force_hotplug" (use HDMI even if screen is not detected) or "hdmi_ignore_...
by rpdom
Sat Apr 26, 2014 4:25 pm
Forum: Troubleshooting
Topic: setting rasppi as ssh server
Replies: 4
Views: 870

Re: setting rasppi as ssh server

If I want to access my Pi (well, actually my Pi isn't visible from outside, but one of my other Linux systems is) from the internet I would do something like (using your examples) user@Desk:~$ ssh pi@86.129.X.X http is for web sites, not for ssh. Note that this doesn't work on many routers when run ...
by rpdom
Sat Apr 26, 2014 4:18 pm
Forum: General discussion
Topic: Starting point for electronics
Replies: 23
Views: 3799

Re: Starting point for electronics

I got started with the Ladybird book "Magnets, Bulbs and Batteries" aged 4. Later I moved on to simple electronics with transistors, valves and things like 555 timers.
by rpdom
Sat Apr 26, 2014 4:04 pm
Forum: Beginners
Topic: CPU running at high temp for no reason. How do I debug?
Replies: 24
Views: 3297

Re: CPU running at high temp for no reason. How do I debug?

60°C is well within spec, and running 20°C above ambient temperature sounds reasonable to me. I wouldn't worry about it.
by rpdom
Sat Apr 26, 2014 6:52 am
Forum: Raspberry Pi OS
Topic: 256 MB model not working ?
Replies: 5
Views: 1317

Re: 256 MB model not working ?

Lets see if I can get this right without looking it up. Model B1: The first model B. Has (green) fuses F1 and F2 near the LEDs Model B1.1: Updated model B. Has (black) links for F1 and F2, marked with a "0" on top. Model B2: Very rare 256MB version. Has no F1 or F2. Has two "mounting" holes on the b...
by rpdom
Sat Apr 26, 2014 4:52 am
Forum: Beginners
Topic: First boot, no keyboard, no LAN
Replies: 7
Views: 1257

Re: First boot, no keyboard, no LAN

As mahjongg said, it could be the X1 crystal playing up. Sometimes a sharp tap on the crystal casing will get it going again (tap it with the end of a pencil or something like that). If that doesn't work, then briefly applying a hot soldering iron to the points where the crystal is connected to the ...
by rpdom
Sat Apr 26, 2014 4:40 am
Forum: Networking and servers
Topic: Connecting RPi to RPi NAS
Replies: 5
Views: 1241

Re: Connecting RPi to RPi NAS

It is possible that it isn't mounting the drive, and you need to be root to do that. If you start a terminal session and do "df -h" does the NAS show up there? If not, try changing your fstab entry to include the "users" option, which will allow anyone to mount or dismount the NAS file system, like ...
by rpdom
Fri Apr 25, 2014 6:23 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: DSI Connector : How to use it?
Replies: 1
Views: 1049

Re: DSI Connector : How to use it?

There will soon(ish) be released a special Raspberry Pi LCD touchscreen that will plug into the DSI connector. That is what it is for. You won't be able to connect any other screen (unless someone produces a fully compatible screen). [edit] The drivers will (at some point) support using hdmi (or RCA...
by rpdom
Fri Apr 25, 2014 7:45 am
Forum: Beginners
Topic: Read-only file system
Replies: 3
Views: 3335

Re: Read-only file system

Possibly some errors were detected on your root file system and it has been remounted in read-only mode. You can check this by trawling through the output of the "dmesg" command and looking for a message to that effect, or by looking at the output of mount | grep " / " and seeing if it comes up with...
by rpdom
Fri Apr 25, 2014 5:45 am
Forum: Troubleshooting
Topic: Hot to the touch
Replies: 8
Views: 1177

Re: Hot to the touch

The chips will often feel hot to the touch. That is quite normal and normally nothing to worry about. What temperature does the system report when you do vcgencmd measure_temp as long as that is under 85°C the CPU/GPU is within acceptable temperature range. The shutting down thing is a bit worrying....
by rpdom
Thu Apr 24, 2014 8:34 pm
Forum: Advanced users
Topic: rpi-update
Replies: 6
Views: 1425

Re: rpi-update

How do I check if I have that package selected? I am more up to speed with yum than apt-get. One way is with the dpkg command rpdom@raspi:~$ dpkg -l raspberrypi-bootloader Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err...
by rpdom
Thu Apr 24, 2014 7:59 pm
Forum: Python
Topic: program installation
Replies: 17
Views: 2098

Re: program installation

So your program is called minefinder and is now located in /usr/local/bin.

What does

Code: Select all

ls -l /usr/local/bin/minefinder
show?

Also what do you get if you type in

Code: Select all

echo $PATH
by rpdom
Thu Apr 24, 2014 7:55 pm
Forum: Advanced users
Topic: rpi-update
Replies: 6
Views: 1425

Re: rpi-update

Do you know if apt-get can upgrade the firmware? If you have the "raspberrypi-bootloader" package installed (which you probably do), then yes. apt-get will upgrade to a recent stable version of the firmware. rpi-update will (by default) upgrade to the very latest (possibly test) version of the firm...
by rpdom
Thu Apr 24, 2014 7:03 pm
Forum: Beginners
Topic: How to install downloaded software
Replies: 3
Views: 789

Re: How to install downloaded software

What software and where did you download it from? Is it source code or pre-compiled software? Not all software will work on a Raspberry Pi. Windows software will not run. Software for Linux PCs will mostly not run. Software for some other ARM based systems will not run or may corrupt your system. Ma...
by rpdom
Thu Apr 24, 2014 6:56 pm
Forum: Advanced users
Topic: sh script question
Replies: 8
Views: 1880

Re: sh script question

You can make the script ask for the name like this #!/bin/bash echo "Enter new User name" read Name sudo useradd $Name -m -G users sudo passwd $Name sudo smbpasswd -a $Name or you can make the script take the name as an argument on the command line ("myscript john" for example) #!/bin/bash Name="$1"...
by rpdom
Thu Apr 24, 2014 1:55 pm
Forum: Compute Module
Topic: Female Headers for the IO Board
Replies: 46
Views: 11387

Re: Female Headers for the IO Board

Female to Male jumper cables are readily available, and about the same price as M-M and F-F ones.

I don't see the problem.
by rpdom
Thu Apr 24, 2014 1:53 pm
Forum: Off topic discussion
Topic: dropbox @ rpi without X ?
Replies: 8
Views: 2200

Re: dropbox @ rpi without X ?

Yes, it will. But you don't need sudo for the apt-cache command. Just "apt-cache search dropbox" will work. True, but getting your fingers used to wrintng "sudo" before any "apt-" command reduces amount of cursing in the long run ;) I disagree. Getting used to writing sudo before commands that don'...
by rpdom
Thu Apr 24, 2014 1:25 pm
Forum: Off topic discussion
Topic: dropbox @ rpi without X ?
Replies: 8
Views: 2200

Re: dropbox @ rpi without X ?

topguy wrote:Doing "sudo apt-cache search dropbox" will give you a list of available software related to dropbox.
Yes, it will. But you don't need sudo for the apt-cache command. Just "apt-cache search dropbox" will work.

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