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This code show a basic example of using the color library to make a rainbow appear on RGB LEDs. By varying the hue the rainbow function moves across the whole visible color spectrum.
HSB RGB Arduino Color Library – [Link]
Henning Karlsen writes:
The library supports FAT16 formatted SD cards up to 2GB in size. 4GB FAT16 formatted SD cards might work, but is untested. Long filenames are not supported. Keep you filenames compliant with the old 8.3 standard.
The SD card should be connected to the SPI-pins on your Arduino. Pin connections are available in the documentation in the download.
tinyFAT Arduino Library - [Link]
The Essentials of Electron Tubes
dangerousprototypes.com writes:
Kelvin informs us of an online stash of vintage engineering docs at tubebooks.org. He especially recommends you check out the technical books section/link.
Tubebooks is “a collection of vintage engineering texts, vacuum tube datasheets, and other obsolete information, presented free of charge and without annoying advertisements.”
Online vintage tech library - [Link]
adafruit.com writes:
We’re working on speeding up our LPD8806 library (for massive installations) and wanted to share our nice-and-fast ‘bitbang’ SPI code for use with Arduinos. we use this whenever we have a display that needs fast updating, but don’t want to constrain the system to using the hardware SPI port! You can check it out on GitHub…
High speed, pin-flexible SPI writes - [Link]
Oleg writes: [via]
What started as a quick re-factoring effort transformed to a major redevelopment, but finally all pieces fit together tightly and I am pleased to announce that initial release of USB Host Shield library ver.2.0 has been posted to github.
Some of the major improvements include the use of only 5 Arduino pins, 3.5x faster low-level transfers, and the ability to use USB Hub(s).
Make sure you stop by Circuts@Home to check out the full details like the current/future supported device classes and supported hardware versions .
USB Host Shield library Version 2.0 – [Link]
microsyl.com writes:
I found this LCD make for cellular phone Nokia 3310 by browsing the web at www.jelu.se. There is many interesting things about this LCD: low price, easy to interface via SPI port, can support graphic and text and consume low current. The only thing that I did is writing code who gives you friendly functions to support this LCD. The last version of the library only send the bytes who had changed since the last update. It’s considerably reduce the refresh time who can be very important in a batteries powered system.
Nokia LCD Library - [Link]
microsyl.com writes:
This LCD is very different from the other standards text 2 x 20. This graphic and text LCD is 320 x 200 pixels. This LCD have differents memories map for the text and graphic region. If you buy this LCD in a “real” electronic store you will pay like 400$ each but you can find it brand new in a surplus store for 50$!!!. I used this LCD in a major project to display charts and a lots of information collected around my house: temperature, humidity, wind speed, etc. This LCD is perfect for project that needs to display a lot of information.
Graphic LCD Library for SED1330 – [Link]
microsyl.com writes:
What can we say about a standard text LCD? Nothing else then for 90% of your project you usually begin with this LCD. With those friendly functions you will be able to begin your projects without loosing time writing code for the LCD.
Text LCD Library – [Link]
microsyl.com writes:
The OneWire protocol which in fact needs two wires (data and ground) is fantastic for many reasons: you can have a very long cable (250 feets), you can have multiples of devices on this cable and with a simple code you can poll those devices to get temperature, voltage, switch position, wind speed, etc.
OneWire Library – [Link]
Mike Colagrosso created Avviso, a Processing and Arduino library for sending push alerts to iOS devices using the Prowl API. This would make projects such as Snail Mail Push Alerts a much easier task because a PHP web server is not needed in the set up. The libraries, example code, and set up guide are available on Github.
This is a cool project with comprehensive explanations helpful for newbies. [via]
Avviso library for Arduino and Processing sends iOS push alerts – [Link]
