Tag: interactive media

raspberry pi – external sound card sucess

Installed a Griffin iMic USB sound card on Raspberry Pi today.

Here’s how:

  • plug in imic
  • Edit alsa  config file so that imic is default sound cart
  • test

Details

For editing alsa, follow instructions at beginning of this post for editing /etc/modprobe.d/alsa-base.conf 

But you can stop following the instructions after the first reboot.

http://www.jackenhack.com/raspberry-pi-usb-audio-quality-problems/

For testing, use this command:

sudo aplay /usr/share/sounds/alsa/Front_Center.wav

 

 

 

 

Arduino INPUT_PULLUP mode

notes

When reading the value of a switch with Arduino, its useful to set the INPUT_PULLUP mode so you don’t need to use an external pullup resistor. By the way, the internal pull-up resistor is 20K ohms.

See this tutorial:

http://arduino.cc/en/Tutorial/InputPullupSerial

If its not clear what a pull-up resistor does,  read the links on this forum post.

http://arduino.cc/forum/index.php/topic,22274.0.html

Everybody has their own way to explain it. I would say that when the switch is open, the pull-up resistor weakly pulls the logic value high, so you don’t get random signal readings.

 

Netgear Universal Wifi Adapter WNCE2001

This device works as a bridge to allow devices that have ethernet but not wifi, to become wifi devices.

To access the config page, hook up an ethernet cable, and goto: www.mywifiext.com

Here’s more documentation:

http://kb.netgear.com/app/answers/detail/a_id/14157/~/wnce2001-faqs

This device allows wifi access using the Arduino Ethernet Shield. This is currently the easiest solution for using touch-OSC.

 

Raspberry Pi running Pure Data

example video

http://vimeo.com/50498017

PD extended…

http://log.liminastudio.com/writing/tutorials/how-to-build-pd-extended-on-the-raspberry-pi

and this update

http://puredata.hurleur.com/sujet-8036-build-extended-raspberry-raspbian-wheezy-armf

Running PD on a headless RP

http://guitarextended.wordpress.com/2012/08/28/running-pd-on-a-headless-raspberry-pi/

Here’s a comprehensive install script for PD-extendended from 9/2012

http://iamthemightyjungulator.blogspot.com/2012/09/running-pd-extended-on-raspberry-pi.html

and another

http://puredata.info/downloads/pd-extended-0-43-3-on-raspberry-pi-raspbian-wheezy-armhf