pre cube tests

IMG_0496

First tests with plastic board mounts and a first display frame.

By the way, i use only one 2A 5V Power supply for the raspi, 4 port usb hub and the monitor.

Top and bottom are just some plates from my hobby parts box.

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Optimizing resolutions of the monitor

For all of you guys out there using a small video display like this, it tested some different resolutions.

I found something really nice!
Open your nano editor in the Terminal and edit the :

/Boot/config.txt
as sample:  sudo nano /boot/config.txt
Then we have to activate (You can activate something if you delete the # in front of a function).

# Overscan

overscan_left 0

overscan_right -18

overscan_top -22

overscan_bottom -14
Change the Resoultion for clear types:

framebuffer_width=480
framebuffer_height=400

For Games like open arena or super tux it would be better to change the resolution to:

framebuffer_width=640
framebuffer_height=480

STRG-X will closing the nano editor and asking if you like to save the changes or not.

You can save two of these config files and don`t forget the reboot after changing 😉

After reboot the display should be without black bars around.

searching for a cheap small 3,5 inch monitor

Well, after some research on conrad (german radio shack :-)) and ebay found something.

This small display uses the video connector. So it`s not too sharp. But small, cheap and really bright.

The price was about 25 € including shipping and vat.

This picture is not too good. The display is sharper than it seems.

Display mug

Yes, i started Open Arena 🙂 of course just for the test!

Well, i have to use my screwdriver….

Well, here is just the panel with driver board itself.

panel

It`s really small and has 2 screw holes on each side for a easy fit.

Configuring WPA2 using wpa_supplicant on the Raspberry Pi

By the way, this was extremely helpful getting my wifi dongle running with a hidden wpa2 connection running wheezy.

kerneldriver

To use WPA2 pre-shared key on the Raspberry Pi, you will first need to add a network configuration to “/etc/wpa_supplicant/wpa_supplicant.conf”. Note the lack of space in “network={“.

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid="Your SSID Here"
    proto=RSN
    key_mgmt=WPA-PSK
    pairwise=CCMP TKIP
    group=CCMP TKIP
    psk="YourPresharedKeyHere"
}

After you have modified wpa_supplicant.conf, you will need to change the “wlan0” section of “/etc/network/interfaces”. For a static IP, it will look like this:

# allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet static
    address 10.1.2.20
    netmask 255.255.255.0
    network 10.1.2.0
    gateway 10.1.2.1

For DHCP, it will look like this:

# allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

After that, you will need to bring up the “wlan0” interface using “ifup”:

# sudo ifup wlan0

You may have to bring the interface down and then back up:

# sudo ifdown wlan0
# sudo ifup wlan0

You may see messages like this:

View original post 145 more words

First drawings and a paper cube

Well,

after some drawings later, i decided to create a paper cube to see how it could fit all together.

I will upload some Pictues of the drawings later as well as some ideas about a small circuit board for the power,

external connectors, power-on button and a secondary video out-out.

Maybe it could be helpful to put a audio amplifier on the circuit board?

Update 28th of april: Working on a audio amplifier…

The Idea

The idea

Raspiboard

Hi,

I´m Gregor. I used the raspberry pi for a while and had a everday problem.

All that connectors, power plugs, USB Hubs and cables…..

OMG!

Cable mess all around!

I need a all in one case.

So, hmm!

I like the cubic Apple Designs of Hartmut Esslinger in the past days  and so i decided to create a new really small device.

But much smaller!  Just a little cube.

Here you can read about my conclusions:

It should fit in my palm. hmm….

So, that was really my first reference point?!?! OK.

The cube should not be bigger than 11 cm about 4,3 inch.

Okay, so we need a small Display. Note more than 3,5 inches.

I need my paper pad now….

The Idea

Read on.. 😉