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by rpdom
Thu Jan 30, 2014 8:42 am
Forum: Beginners
Topic: File Transfer over ETH0
Replies: 23
Views: 4292

Re: File Transfer over ETH0

SSH isn't a peer to peer connection. It is a client to server connection. The ssh server (sshd) will be running on your Pi, but to scp files from the ssh client on the Pi to other systems you will need ssh servers running on the other systems too. It can't be that because he tried to just connect t...
by rpdom
Thu Jan 30, 2014 8:19 am
Forum: General discussion
Topic: How can I use LED's like these?
Replies: 3
Views: 553

Re: How can I use LED's like these?

Be careful how much current you take from the GPIOs. The maximum is something like 16mA on any one pin and about 60 mA total maximum. Check the rating of the ones you've got. You may need to make an interface circuit to boost the power.
by rpdom
Thu Jan 30, 2014 8:13 am
Forum: Beginners
Topic: File Transfer over ETH0
Replies: 23
Views: 4292

Re: File Transfer over ETH0

SSH isn't a peer to peer connection. It is a client to server connection.

The ssh server (sshd) will be running on your Pi, but to scp files from the ssh client on the Pi to other systems you will need ssh servers running on the other systems too.
by rpdom
Thu Jan 30, 2014 8:10 am
Forum: Other projects
Topic: Driving a single high power LED using PWM
Replies: 55
Views: 10041

Re: Driving a single high power LED using PWM

Transistor? Probably a MOSFET to handle that load easily. It needs to be one that can switch on a little below 3.3v.
by rpdom
Wed Jan 29, 2014 7:36 pm
Forum: General discussion
Topic: ARM2835 pin assignment
Replies: 3
Views: 512

Re: ARM2835 pin assignment

The JTAG pins are show on the Raspberry Pi Schematics.

On the Main page of this website, look at About -> Technical Help and Resource Documents.
by rpdom
Wed Jan 29, 2014 4:43 pm
Forum: Beginners
Topic: Initial startup
Replies: 5
Views: 807

Re: Initial startup

If you have installed one of the individual "Image" files like Raspbian using dd or the win32 imager program, then yes you can connect remotely via SSH (as long as you can find the IP address allocated to the Pi - lots of posts about how to do that). If you are using the NOOBS installer/manager meth...
by rpdom
Tue Jan 28, 2014 8:49 am
Forum: Advanced users
Topic: SSD Storage?
Replies: 11
Views: 4025

Re: SSD Storage?

Though I suppose if I hacked the USB port and ran the wires with a SATA converter I could go that route... is this even possible??? Cant say ive ever seen this done internally If your soldering skills are good enough, you could remove the dual USB socket and replace it with a single one. Then you c...
by rpdom
Tue Jan 28, 2014 7:50 am
Forum: Beginners
Topic: Connecting GPIO 1 to 25 shuts off the board
Replies: 5
Views: 873

Re: Connecting GPIO 1 to 25 shuts off the board

Connecting a volt meter in that way shouldn't cause a problem. It should read 3.3V as long as the volt meter is set to the correct range. If the meter is set to measure current (A or mA), or is faulty, then connecting together P1-01 (3.3V) and P1-25 (0V GND) will short out the power, which you reall...
by rpdom
Tue Jan 28, 2014 7:05 am
Forum: Raspberry Pi OS
Topic: Pure Data How to Unzip
Replies: 6
Views: 3377

Re: Pure Data How to Unzip

That's odd.

When I went to the download link you gave, I got a file called pd-extended_0.43.4~extended1-1~raspbian_wheezy_armhf.deb
I don't know where that 2014-01-07-wheezy-raspbian-hy28b.zip file came from :?:
by rpdom
Tue Jan 28, 2014 6:50 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Flash/SD card driver for RPi
Replies: 1
Views: 431

Re: Flash/SD card driver for RPi

If you are writing your own OS, you should have a look at the Bare Metal section of the forums. At least one person there has been working on drivers for the SD card.
by rpdom
Mon Jan 27, 2014 9:28 am
Forum: Bare metal, Assembly language
Topic: PLLA, C, D, avoid_pwn_pll?
Replies: 1
Views: 796

Re: PLLA, C, D, avoid_pwn_pll?

If you haven't already got it, there is information on how to use PWM and a lot more in the BCM2835 ARM Peripherals document available on http://www.raspberrypi.org/technical-help-and-resource-documents It's the one marked BCM2835 (SoC) Datasheet. It may have a few errors and typos in , so read it c...
by rpdom
Mon Jan 27, 2014 8:03 am
Forum: Beginners
Topic: Issues with permissions on a flash drive
Replies: 12
Views: 2923

Re: Issues with permissions on a flash drive

Now your filesystem is set up correctly and working (ext3 is fine, ext4 has a few improvements - mostly to journalling/error recovery), you just need to sort out the permissions. By default a new file system will be owned by root and only give read access to everyone else. Now you just need to set t...
by rpdom
Mon Jan 27, 2014 7:52 am
Forum: Beginners
Topic: usb bar code
Replies: 3
Views: 577

Re: usb bar code

It is also worth posting the results of running "dmesg | tail -40" about 10 seconds after connecting the device. It may show some information about what is detected.
by rpdom
Mon Jan 27, 2014 7:45 am
Forum: Troubleshooting
Topic: SD card corupted?
Replies: 14
Views: 1789

Re: SD card corupted?

There is an internal write-protect flag that can get set on the card which prevents any writes. I believe gsh mentioned it once. I think he said it can be cleared but I don't know how to do that.
by rpdom
Mon Jan 27, 2014 7:23 am
Forum: General discussion
Topic: How to switch from HDMI to Composite?
Replies: 17
Views: 11930

Re: How to switch from HDMI to Composite?

The easiest way to switch to Composite video out is to disconnect the HDMI cable and reboot. If you installed using NOOBS, then there may be (as lafalken said) a line in config.txt that is forcing HDMI and that would need to be changed or commented out. There is a way to change outputs while running...
by rpdom
Mon Jan 27, 2014 7:06 am
Forum: Raspberry Pi OS
Topic: Pure Data How to Unzip
Replies: 6
Views: 3377

Re: Pure Data How to Unzip

It looks like you've downloaded a Deb file, which is the correct format for use with Raspbian (especially as it states it is for Raspbian on the Pi) :) As long as it doesn't require any other additional software to be installed at the same time, installation should be as easy as pi@raspberrypi:~$ su...
by rpdom
Sun Jan 26, 2014 8:03 pm
Forum: Beginners
Topic: Issues with permissions on a flash drive
Replies: 12
Views: 2923

Re: Issues with permissions on a flash drive

Sorry guys, I'm a little bit lost. Are you saying that I can keep the drive formatted as fat32 but mount it as ext3 so that the rights will work properly? Sorry for the confusion. I'll try and clarify. What fdisk says is just what you have told it is on the drive. It doesn't really have to be what ...
by rpdom
Sun Jan 26, 2014 7:53 pm
Forum: Python
Topic: bitwise operand from python2.7 to python3.2.3
Replies: 14
Views: 3495

Re: bitwise operand from python2.7 to python3.2.3

I also used coding sheets to write programs in COBOL, but I didn't have to pass them to the punch room to be input as I had access to a terminal :)

The code was ugly, limited (although I found ways around some of that), and very long-winded. I preferred working in assembler whenever I could.
by rpdom
Sun Jan 26, 2014 5:17 pm
Forum: Troubleshooting
Topic: Pi not booting when connecting to GPIO via Ribbon Cable
Replies: 18
Views: 3208

Re: Pi not booting when connecting to GPIO via Ribbon Cable

No. Not a rotation. Look closely at the last picture. The red stripe is on the wrong side of the cable. It is pin 26, not 1. Now really look at how the cable is connected to the PiFace. No rotation there at all. But by connecting the socket to the back of a plug the connections are flipped 1 to 2, 3...
by rpdom
Sun Jan 26, 2014 2:43 pm
Forum: Beginners
Topic: Issues with permissions on a flash drive
Replies: 12
Views: 2923

Re: Issues with permissions on a flash drive

FTrevor: Actually you can get away with creating any sort of filesystem on a partition and changing the fstab line to match it. The mount command doesn't really care what the partition type is set to. But it can get confusing, so you can go into fdisk and just change the partition type flag to Linux...
by rpdom
Sun Jan 26, 2014 1:24 pm
Forum: Troubleshooting
Topic: Pi not booting when connecting to GPIO via Ribbon Cable
Replies: 18
Views: 3208

Re: Pi not booting when connecting to GPIO via Ribbon Cable

Even with the pictures, I'm not convinced. It looks like you've got the end of the ribbon (female) plugged to a male PCB header. Please tell me I'm wrong, and that you have in fact got a male ribbon connector crimped directly to the ribbon. No, I think you are right from what I can see in those pic...
by rpdom
Sun Jan 26, 2014 8:26 am
Forum: Beginners
Topic: loading software onto the pi
Replies: 4
Views: 752

Re: loading software onto the pi

First rule of asking for help with errors: Post the exact command used and all of the messages. Some of them may not appear to be important, but might help with troubleshooting. The "timeout error connecting to 192.168.20.214:80" is puzzling. That would be the address of a computer or router on your...
by rpdom
Fri Jan 24, 2014 6:12 pm
Forum: Troubleshooting
Topic: No such file or directory.
Replies: 5
Views: 2473

Re: No such file or directory.

I think you have something very wrong in your sources.list on your Pi if it thinks it needs ubuntu versions of packages!

Have you accidentally added some Ubuntu repositories?
by rpdom
Fri Jan 24, 2014 5:06 pm
Forum: General discussion
Topic: what's installed on my pi
Replies: 5
Views: 1585

Re: what's installed on my pi

You could try pi@raspberrypi:~$ cat /etc/os-release PRETTY_NAME="Raspbian GNU/Linux 7 (wheezy)" NAME="Raspbian GNU/Linux" VERSION_ID="7" VERSION="7 (wheezy)" ID=raspbian ID_LIKE=debian ANSI_COLOR="1;31" HOME_URL="http://www.raspbian.org/" SUPPORT_URL="http://www.raspbian.org/RaspbianForums" BUG_REPO...
by rpdom
Fri Jan 24, 2014 4:58 pm
Forum: General discussion
Topic: Can I charge my raspberry pi via usb with 3 AA bateries?
Replies: 11
Views: 1736

Re: Can I charge my raspberry pi via usb with 3 AA bateries

Thanks so much! I just need a 3 hour duration. Do you think such a battery would be enouth to run a pi plus a câmera or shoul I use a ion littiun battery instead? A standardish PP3 type alkaline 9V battery has a power rating of around 550mAh. If you use a linear regulator like a 7805 then you will ...

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