This page has been liquidated and re-organized into new pages as of November 2007. Please refer to the pages linked from the main menu to add new content to the appropriate section. thanks!

Circuit + Components Library

Input

Time

• A tutorial for a DCF77-based radio clock
• Use the Dallas/Maxim DS1306 Real-time Clock chip with Arduino.

Environment

Thermistor

• A simple lookup table method of getting Celcius numbers from a 10k thermistor. Code & calculating spreadsheet here: thermistor

Location

HMC6352 I2C Compass Sensor

• Read heading from a compass sensor, using the Wire library. Here's the sketch: Learning.hmc6352

GPS

• Arduino code for parsing data from the EM-406 GPS module, by bigengineer.
• How to connect a Paralla* GPS module to the Arduino, and read its $GPRMC string. Tutorial translated from Igor Gonz�lez Mart�n's original Spanish tutorial. This allows you to get date, heading, latitude and longitude from the GPS module.

Motion

Accelerometers

• Connect the Arduino to the LIS3LV02DQ Triple Axis Accelerometer

Encoders

• A little sketch for reading rotary encoders.
• Optical mouse sensor library (for PAN3101, ADNS2610 or ADNS2051 sensor) and tutorial.

RFID

• Code for using the P*rall*x RFID reader with Arudino. Based on the Wiring tutorial.

Devices

Joysticks

• A good tutorial on how to connect five or more joysticks to the Arduino

Nintendo and Super Nintendo Game Pads

• See http://www.rahji.com/NESpad for libraries that handle the serial communication between one of the many types of NES or SNES game pads and an Arduino.

Bar Code Scanners and PS2 devices

• You can hook up a barcode scanner (which simulates a keyboard) or a keyboard to the arduino. See barcode scanner

PS2 mouse interface

• Read data from a PS2 mouse. Useful if you want to use the encoders from an

old mouse in a robot or other device. PS2 mouse interface

Matrix Keypad

• Reads a keypad with up to 16 keys. To find out how to connect your keypad open the library file keypad.cpp and read the "PIN MAPPINGS" notes to see which pins you need to connect.
• See Keypad Tutorial

SIRCS Remote Control

• Decode control codes sent from a common type of IR remote control handset
• See IRLib

Multiplexing

Multiplexers

• read the forum post on analog multiplexers
• learn how to use the Motorola MC14067BCP Analog multiplexer/demultiplexer through the fluidforms tutorial

Output

Light & Displays

MAX7219

• read the forum post on the MAX7219 8x8 Led Matrix driver with full code example.
• download the MAX7219 datasheet

LEDs

• Schematic for driving multiple leds from one Arduino pin.
• Tutorial for using the MAX7219 Matrix LED driver with the Arduino.
• Example of how to using an LED as a light sensor.
• Library for blending colors with an RGB LED.

DMX lighting control

• How does the DMX protocol work?
• A DMX Shield for the Arduino
• A DIY DMX Transceiver
• Some DMX code examples
• Use ardunio as an opendmx usb interface

hc4led

• A cheap 4-digit seven segment led display with SPI. No decimals, though. code here: Hc4led

LCD HD44780

• See Code.LCD

LCD's

• neillzero's 4-bit LCD library.
• glasspusher's 4-bit forum post with code
• massimo's 4-bit forum post with code
• tomek added a schematic, picture, Commands for Character Modules and another code example.

• LCD chapter from free PIC microcontrollers book has some good explanation.
• Ian Harries' "Initialisation of the HD44780"
• Peter Ouwehand's "How to control a HD44780-based Character-LCD"

• The Arduino controls Serial LCD's over a simple four-wire connection, by djmatic.

POV

• Arduino does persistence of vision, too.

High Power

Relays

• Schematic for driving DC relays using a transistor connected to an Arduino pin.

Sensing 12V or higher inputs

• Arduino can only sense 0-5V inputs. Here's a schematic explanation of how to interface to 5V or higher.

Motors

Solenoids

• Schematic for driving DC solenoids, using a transistor connected to an Arduino pin.
• A Solenoid Tutorial.

Servos

• You can control up to 20 hobby servos simultaneously with the Software Servo Library.
• You can control 2 servos, on pin 9 and 10, very precisely with the Servo Timer 1 Library.
• You can control very large numbers of servos precisely using an external PWM chip for each group of 16 servos. See the PWM Expansion note. There will be a servo library for this part eventually.

DC Motor Control

• Eagle files for an L293-based Arduino motor driver shield.
• Datasheet for the L293 motor driver IC. Blog diagram of how to connect the L293 to an Arduino. (Peltier Elements are working with this IC, too)

PC Fan Speed Control

• Reading RPM
• Speed Control

Robotics

• Put Arduino in the Asuro Robot's brain.

Audio

Resistors and Potentiometers

• see dusjagr labs for an easy way to control a resistor in a circuitbent toy or a simple analog electronic circuit for lo-fi music

Audio Devices

• Control an iPod with the Arduino, by Jonas Olson & Robert White.
• Connect Arduino to the YAMPP III Industrial MP3 player, diagrams by Jens Wunderling.
• Some code for controlling an Ipod remote through Processing, by Rosie Daniel...

Midi

• Make your Arduino into a MIDI drum controller with Todobot's tutorial
• The Midi Out tutorial from the fine folks at ITP.
• A blog on building a midi guitar pick using the Arduino.
• read six sensors and send their values as Midi CC messages

Imaging

Controlling Cameras

• Remote control a Canon EOS to take time lapse photos. The same wiring and interface should work on other cameras.

Multiplexing

PWM Expansion

• How to use TLC5940s to add more PWM outputs.

Storage

Extended EEPROM library

• The EEPROMex library extends the standard EEPROM library with: Reading, writing bytes, longs, ints, floats and doubles, single bits, structs, arrays and more. EEPROMex library

USB memory stick

• Datalogging to a usb memory stick with ftdi board usb memory nick

Communication

Networks

• Here is a blog describing how to connect to an internet chat server using the Arduino and a Lantronix ethernet module.

Wireless

• Wireless communication with PC and Arduino board using bluetooth, by Mitchell Page.
• Connect Arduino to the EasyRadio transceiver module, diagrams by Jens Wunderling.

XBee radio modules

• The XBee Shield by M. Yarza, the Arduino Developer at Libelium
• Schematics and Eagle files for M. Yarza/Libelium's Xbee shield
• Arduino and Xbee(ZigBee), Interface Circuit (AXIC), by Thomas Ouellet Fredericks (tof).
• Xbee Programming Arduino Wirelessly, by Tom Igoe.
• Arduino to Xbee, from Beatriz Da Costa's course outline.

Other Resources

• Sensor Wiki - a Wiki about sensors and circuits
• Wiring electronics reference - how to connect basic components and a glossary of symbols.
• Open Circuits - projects, components, techniques, and PCB footprints.

To be moved to a different page.

Shields under development

XBee Shield

A shield for Arduino boards that can either act as interface between your computer and the XBee wireless network, or as a wireless port for your Arduino boards. Designed by M. Yarza in collaboration with Arduino's team. (more)

SID-shield

The shield contains a SID-emulator, programmed on an ATMEGA168 chip, some electronic components to use the ATMEGA and a small amplifier and mini-jack out. The idea is to emulate the original SID chip from the Commodore 64, cos its hard to get, and have the whole interface-abilities from the arduino. The SID-emulator was programmed by C. Haberer, see Roboterclub Freiburg for details. The shield has been designed by dusjagr/SGMK and will be posted here soon. The systems allows you to create original 8-bit sounds programmed and controlled via the Arduino board. (More about SID-emulator)