This page has been liquidated mostly to GeneralCodeLibrary. hirzel November 05, 2007, at 09:44 PM

Code Library

Capacitive Sensor code

• Up to 6 capacitive sensors (touch) without additional hardware

• Arduino as capacitive sensor

Sensor code

• Making sense of the Parallax PIR sensor's output
• Using Infrared receiver modules

Smoothing Functions

• smooth(data, filterVal, smoothedVal) - a low-pass filter smoothing function,
  useful for removing sensor jitter

• digitalSmooth(data, smoothArrayName) - a digital low-pass filter smoothing function, useful for removing sensor jitter, and glitches

Mapping Functions

• autoscale - scale a variable between two ranges using linear interpolation

• fscale - a function to map a variable between two floating point ranges.
  Has a parameter to logarithmically favor either end of the output range

Frequency Generation

• Frequency generation using a hardware timer to drive a pin accurately or generate a periodic interrupt calling a function you supply.

• freqout(freq, duration) - a simple frequency generator

• Musical Algo Fun :: Making music with old PC speakers

PWM Techniques

• PWMallPins - here's how to get more PWM pins
• atmega_i2c_pwm_expander - Use an ATmega as a PWM expander, controlled by I²C

Interrupts

• How to use Interrupts in Arduino.

Matrix LED backpack

• Code for running the Sparkfun RGB matrix LED backpack.

Random Functions

• randomHat() - choose every number from a "hat" before repeating
• randomWalk(stepSize) - wander between endpoints at a specified rate

Multiplexing

• Code for the 74XX151

Patches for tweaking standard Arduino releases

• Make Arduino-0007 sketches smaller

Programming the Arduino with AVR ISP

• Using the AVR ISP mkII (USB) to burn the bootloader on MacOS X

Programming the Arduino with another Arduino

• You can turn an Arduino into a programmer for other targets.

EEPROM code

• Tricks for using the hidden EEPROM and Flash memory

Dataflash library

• Library for using dataflash memory If you need some more memory dataflash might be an option.

Serial code

• SimpleMessageSystem: Send, receive and parse characters, integers and lists between Arduino and Max/Msp or Pure Data
• General purpose program to control most Arduino functions via serial communication with computer- reads state on dig & analog input pins and sends data to the output pins
• A standalone printFloat function with no library imports

Timer code

• Metro Lib: Implementation of recurring timed events like blinking LEDs or servo motor control

Windows Utilities

• Windows command line build/upload For most Windows users, this is a lot easier to get working than using the generic Makefile: no need to find a make utility, grep, etc.

Ardustat: Galvanostat/Potentiostat

• Ardustat: Schematics and code to build an electrochemical characterization devices using an Arduino.

Behavior based programs

• Behavior based programs: A framework for describing control logic as Behavior classes.

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