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by Maxion
Thu Aug 22, 2013 2:27 pm
Forum: Troubleshooting
Topic: USB redux
Replies: 514
Views: 201745

Re: USB redux

Here's an interesting post about a current bug in USB core of linux. I'm not entirely sure if this would apply to any of the problems regarding USB on the RPi.

https://plus.google.com/u/0/11696035749 ... Zpndv4BCCD
by Maxion
Sat Jun 01, 2013 9:42 pm
Forum: Advanced users
Topic: Using the Pi in a vibration-prone, power-hostile environment
Replies: 9
Views: 3339

Re: Using the Pi in a vibration-prone, power-hostile environ

Hi everyone, I'm thinking about embedding a Raspberry Pi in an automotive project. I expect lots of vibration, and abrupt loss of power every time the ignition gets turned off. Question 1: do you think that the vibration would cause issues with the SD card coming loose? What would be a good way to ...
by Maxion
Fri May 31, 2013 9:58 pm
Forum: Networking and servers
Topic: 10 Person Minecraft Server? Is this possible?
Replies: 30
Views: 10689

Re: 10 Person Minecraft Server? Is this possible?

No I don't think it's possible, the Pi is too slow.
by Maxion
Fri May 31, 2013 2:23 pm
Forum: Automation, sensing and robotics
Topic: Pt100 Temperature Sensor RTD-to-Digital Converter (MAX31865)
Replies: 3
Views: 16809

Re: Pt100 Temperature Sensor RTD-to-Digital Converter (MAX31

The 31855 is similar to the 31865 but it is for thermocouples. There are quite a few tutorials and example scripts available for it for the Pi. IT also uses the SPI interface.

https://github.com/Tuckie/max31855/blob ... ax31855.py
by Maxion
Fri May 31, 2013 2:20 pm
Forum: Camera board
Topic: 2 camera theory
Replies: 3
Views: 940

Re: 2 camera theory

It won't work. The computer expects to talk to one camera and not with two. If you did this and tried to take a photograph I suspect the program would hang at best.

The CSI interface is not a bus. You can't connect multiple devices to it.
by Maxion
Thu May 30, 2013 3:08 pm
Forum: Camera board
Topic: Panobot - A Panorama taking pi powered robot
Replies: 11
Views: 7464

Re: Panobot - A Panorama taking pi powered robot

Now this is an interesting idea! You note that the FoV is quite low, however this was a bug in the camera software and has now been fixed. If you run apt-get upgrade and rpi-update it should be fixed. This'll most likely massively improve your capture speed. The photos were taken yesterday running ...
by Maxion
Thu May 30, 2013 3:03 pm
Forum: General discussion
Topic: 3G shield or board
Replies: 17
Views: 19915

Re: 3G shield or board

Thank you very much for your help.... Last thing...do you know where can I find a tutorial for dismantle the dongle and solder it via wires to the pads of the USB connector? thank you. The dongle is connected via USB, you'll just have to solder the USB leads together. Check out the USB specificatio...
by Maxion
Thu May 30, 2013 3:00 pm
Forum: Camera board
Topic: Panobot - A Panorama taking pi powered robot
Replies: 11
Views: 7464

Re: Panobot - A Panorama taking pi powered robot

Now this is an interesting idea! You note that the FoV is quite low, however this was a bug in the camera software and has now been fixed. If you run apt-get upgrade and rpi-update it should be fixed. This'll most likely massively improve your capture speed. One interest of note, you're not rotating...
by Maxion
Thu May 30, 2013 2:51 pm
Forum: Automation, sensing and robotics
Topic: Controlling relay
Replies: 19
Views: 3863

Re: Controlling relay

Might have found the error: Hyphens are used to define ranges. For example, 2000-2010 would indicate every year between 2000 and 2010 AC inclusive Inclusive might be tha magic word..... */2 10-11 * * 2,3,4,5 /home/pi/./blink.py Is NOT between 10 and 11 o'clock, but between 11 and 12. Will test it n...
by Maxion
Thu May 30, 2013 2:45 pm
Forum: Python
Topic: usb relay
Replies: 19
Views: 13126

Re: usb relay

That's quite expensive for a 4-channel relay.

You can find other 4-channel relay boards that use the same 5v relays. Just use a darlington array to control them; uln2803. There are a few guides online to using the RPi and the uln2803 to control relays & steppermotors.
by Maxion
Thu May 30, 2013 2:00 pm
Forum: C/C++
Topic: running a script after boot
Replies: 4
Views: 2513

Re: running a script after boot

learning wrote:sleep only pauses its execution but i want the script to be the last to be executed, moments later after boot
Wouldn't running it as a cron job with @boot or @reboot work?
by Maxion
Thu May 30, 2013 6:34 am
Forum: Automation, sensing and robotics
Topic: Raspberry Pi weather station thing
Replies: 9
Views: 15399

Re: Raspberry Pi weather station thing

Wind direction & speed is the hardest. You can create DIY sensors of that type but it's a bit hard. For the other; you should find a myriad of sensors by googling. I like the DS18B20's for temperature. All sensors you'll have to connect via the GPIO pins though, some sensors like the DS18B20 you can...
by Maxion
Thu May 30, 2013 6:33 am
Forum: Python
Topic: run py script after x has loaded
Replies: 1
Views: 558

Re: run py script after x has loaded

You could put it in a cron job as @reboot. That would run the script as soon as the computer has rebooted.
by Maxion
Wed May 29, 2013 11:39 am
Forum: Troubleshooting
Topic: Odd WiFi connectivity problem
Replies: 4
Views: 727

Re: Odd WiFi connectivity problem

What does ifconfig wlan0 show?? Is your wifi IP address static or dynamic?? If it happens again try dhclient wlan0 you could be suffering from an IP lease problem. Richard S. IP adress is static in the sense that I assign the Pi an IP based on its MAC adress from the router. The pi uses DHCP. ifcon...
by Maxion
Wed May 29, 2013 9:31 am
Forum: General discussion
Topic: Help: Reading the Sensor data python's i2c
Replies: 3
Views: 614

Re: Help: Reading the Sensor data python's i2c

This sounds quite a bit like you're asking for help with homework...
by Maxion
Wed May 29, 2013 9:27 am
Forum: Troubleshooting
Topic: Odd WiFi connectivity problem
Replies: 4
Views: 727

Odd WiFi connectivity problem

Hey guys! I've got an intermin solution where I've got a nano wifi dongle connected right to the Pi.. It's using the RTL8188 chipset by ralink and works quite well. I use wicd to manage the connection However, every couple of hours it suddenly drops SSH connections and stops responding to ping. I ca...
by Maxion
Mon May 27, 2013 9:28 am
Forum: Camera board
Topic: Auto exposure is off?
Replies: 10
Views: 2184

Re: Auto exposure is off?

Is there only sky in your shot? Or is there something else as well?
by Maxion
Mon May 27, 2013 9:25 am
Forum: Camera board
Topic: RPi Camera issues and status
Replies: 47
Views: 28880

Re: RPi Camera issues and status

Ref: Modes. What will happen is that there will be a new binned mode that will use the full frame (2x2 binned = throw away every other pixel), this will be used as a preview AND when cropped to the right aspect, probably the source for the video record as well. This does mean that 1080p will actual...
by Maxion
Mon May 27, 2013 9:05 am
Forum: Camera board
Topic: Anyone who ordered from RS get their camera yet?
Replies: 49
Views: 6278

Re: Anyone who ordered from RS get their camera yet?

FINALLY got mine today from RS.

Packaged in a bubble wrap envelope, inside a flimsy cardboard box. Cable is kinked but otherwise the camera seems OK.
by Maxion
Sat May 25, 2013 11:30 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI error: spidev has no module SpiDev
Replies: 3
Views: 3255

Re: SPI error: spidev has no module SpiDev

I just tried re-installing a new image of raspbian on a spare SD card, and still no-go. The same error.
by Maxion
Fri May 24, 2013 6:37 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI error: spidev has no module SpiDev
Replies: 3
Views: 3255

SPI error: spidev has no module SpiDev

I'm trying to get SPI to work on my Pi. I've got a script to test SPI by reading a voltage divider. However it fails on the line spi = spidev.SpiDev(0, spi_channel) with the error Attribute error: 'module' object has no attribute 'SpiDev'. I'm running the latest BerryBoot Raspbian kernel, I've run r...
by Maxion
Fri May 24, 2013 7:55 am
Forum: Troubleshooting
Topic: Rapsberry pi with no output...
Replies: 47
Views: 3874

Re: Rapsberry pi with no output...

Code: Select all

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
Change the above line to this:

Code: Select all

# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1
by Maxion
Fri May 24, 2013 7:43 am
Forum: General discussion
Topic: Getting started with Electronics
Replies: 19
Views: 2605

Re: Getting started with Electronics

The Pi got me interested in electronics as well. I've got a bit of background on 12V systems so I just started reading tutorials and creating stuff.

I started by playing with some DS18B20 temperature sensors, very easy to set-up and very little soldering. Perfect for noobs like me!
by Maxion
Thu May 23, 2013 4:41 pm
Forum: General discussion
Topic: Using RPi in a hot dusty desert
Replies: 12
Views: 3761

Re: Using RPi in a hot dusty desert

If you can, use a Model A. Not only cheaper but it uses about 1/3 the power => generates correspondingly less heat. If you need the Model B, consider a heatsink kit to mount to the SoC and USB/LAN chip, they are not too expensive. Or make your own. http://www.amazon.com/Aluminum-Heatsink-set-Raspbe...
by Maxion
Thu May 23, 2013 3:37 pm
Forum: Beginners
Topic: DC-DC Converter Vs 7805 Vs magpi power supply
Replies: 5
Views: 2040

Re: DC-DC Converter Vs 7805 Vs magpi power supply

Why not use something based on the LM2596 ? Input up to around 36V and output selectable from 1V to 33V. Rated output at 2A. 90%+ effective, doesn't really produce any heat.

There are many boards using it that can be had for around 10 €.

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