develop google app engine with eclipse on mac

Here are the two notes for Mac user, when setting up pydev of eclipse on mac:

The path of the python interpreter for eclipse on mac leopard:
/System/Library/Frameworks/Python.framework/Version/2.5/bin/Python2.5


The path for "Run > Open Run dialog > python run > main module:
/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/dev_appserver.py


Tutorial
http://daily.profeth.de/2008/04/google-app-engine-eclipse-pydev.html
http://de.youtube.com/watch?v=e1dtyQ6wqzc
http://www.ibm.com/developerworks/opensource/library/os-eclipse-mashup-google-pt1/

arduino tutorial structure

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• physical computing
  • basic tutorial
    • step 1 digital I/O
      • LED
        • Example 01 : Blinking LED
      • button
        • Example 02: Turn on LED while the button is pressed
        • Example 03A: Keep LED on after the button is released
        • http://www.arduino.cc/en/Tutorial/Button
      • tetris arduino 2 processing
        • Example 08A: Arduino networked lamp (Processing code)
        • Example 08B: Arduino networked lamp (Arduino code)
    • setp2 analog I/O
      • light sensor
        • http://arduino.cc/en/Tutorial/AnalogInput
      • potentiometer
        • http://arduino.cc/en/Tutorial/AnalogInput
      • capacity sensor
        • circuit is the same as light sensor. Just connect to the mental
      • fading led
        • http://arduino.cc/en/Tutorial/Fading
      • piezo
        • http://arduino.cc/en/Tutorial/Knock
      • accelerometer
        • http://arduino.cc/en/Tutorial/Memsic2125
        • http://www.arduino.cc/en/Tutorial/ADXL3xx
    • setp 3 actor
      • servo moto control
        • http://arduino.cc/en/Tutorial/Sweep
        • http://arduino.cc/en/Tutorial/Knob
      • piezo
        • http://arduino.cc/en/Tutorial/Melody
        • http://arduino.cc/en/Tutotial/KeyboardSerial
      • transister
        • IRF520
        • http://en.wikipedia.org/wiki/Transistor
        • datasheet
      • relay
        • http://www.arduino.cc/playground/uploads/Learning/relays.pdf
    • step 4 advance input sensor
      • ultra sonic sensor
        • http://arduino.cc/en/Tutorial/Ping
    • step 5 communication between arduino, arduino and pc
      • serial data
    • step 6 wireless communication
      • Xbee Shield
        • basic
          • http://www.arduino.cc/en/Main/ArduinoXbeeShield
          • http://arduino.cc/en/Guide/ArduinoXbeeShield
        • X-CTU
          • http://www.makingthings.com/documentation/how-to/update-xbee-settings-with-x-ctu
    • step 7 hack electronic
      • heck button
        • mp3 player
      • heck switch
        • toy
      • heck power
        • coffee machine
      • speaker
        • change risister
  • one day project
  • one week project
  • Tutorial Example code
    • http://makezine.com/getstartedarduino/
    • Example 03B: Improvement to 03A
    • Example 03C: 03B with de-bouncing added
    • Example 04: Fade an LED in and out
    • Example 05: LED on/off switch with brightness adjustment
    • Example 06A: Blink LED at a rate specified by the value of the analogue input
    • Example 06B: Set the brightness of LED using analogue input
    • Example 07: Sending data over the serial port

time-critical computing of arduino

This workshop was hold by Vanessa. Here is their description.
http://geekphysical.blogspot.com/
Our "advanced" offering is for the (nearly) elites in the field. You're good, very good in fact, but you could be better; there are methods and sneaky ways of tricking that clever little chip into listening to your every whim, and we're going to teach you them. Our first advanced workshop will focus on time-critical computing, making the most of every nano-second spent running your program. Time is wasted all the time waiting for the Arduino to complete its loops, to run through all its processes, but what if you could run processes in parallel?

The basic idea is to turn off all the background programs done by arduino and do all the program such as managing the interrupts by the avr-libc to call micro-controller's basic function. In this way, we can make sure our program will not be interrupted by some unknown signals. It is useful. When making some sounds, it will not delay. When receiving data, it will not lose data.

example code

#define SET(x,y) (x |=(1<#define CLR(x,y) (x &= (~(1<#define CHK(x,y) (x & (1<#define TOG(x,y) (x^=(1<
SIGNAL(SIG_OUTPUT_COMPARE1A)
{
OCR1A+=10000;
TOG(PORTB,5);
}

void setup()
{
}

void loop()
{
// Turn off all interrupts
TIMSK0=0;
TIMSK1=0;
TIMSK2=0;
EIMSK=0;
PCICR=0;

TCCR1A=0;
TCCR1B=0x03;
TCCR1C=0;
SET(TIMSK1,OCIE1A);
sei();

SET(DDRB,5);

while(1)
{
asm("nop");
}
}