Posts

Posted on

RGB LED globe

I have been distracted today by an idea to make a globe (any size) out of RGB led’s which would be addressable by lat/lon coordinates. I found a story about these guys who built a single 40 led ring which rotates – at a certain frame rate – with 200 addressable positions – ie., 40×200.

by Solderlab

http://www.solderlab.de/index.php/led-projects/rgb-globe

Here’s an example of spherical projection mapping

by Hrvoje Benko at Microsoft Research

A patent application for a spherical electronic LCD display.

By Robin Dziama

http://www.google.com/patents/US20110199286

Posted on

Coastal wind API

At the Coastal Observing Research and Development Center (CORDC) at UC San Diego

http://cordc.ucsd.edu/projects/models/coamps/api/

REST API

http://cordc.ucsd.edu/js/COAMPS/query.php?help

Examples:

COAMPS URL Services
Recognized parameters: bbox, ll, ts, fmt, callback, force
`ll` and `bbox` are mutually exclusive, with bbox taking precedence.
      bbox: 	Query directive - return records in bounds '<north>,<east>,<south>,<west>'
        ll: 	Query directive - return records nearest '<lat>,<lon>'
        ts: 	Query directive - return records at specific epoch time (seconds)
       fmt: 	Output format.  One of ( json, csv, tsv ), default: json.
  callback: 	For JSON output, a function wrapper's name, ignored otherwise.
     force: 	Caching directive - override cache when true.

Parameter Usage Examples:
      bbox: 	36.25,-116.445,33.919,-119.445
        ll: 	35.1124,-120.221
        ts: 	1362499746
       fmt: 	json
  callback: 	doWindsCallback

All together now!
http://cordc.ucsd.edu/js/COAMPS/query.php?bbox=36.25,-116.445,33.919,-119.445&ll=35.1124,-120.221&ts=1362499746&fmt=json&callback=doWindsCallback

Gotcha!  I said bbox and ll were mutually exclusive.  Try again?
http://cordc.ucsd.edu/js/COAMPS/query.php?bbox=36.25,-116.445,33.919,-119.445&ts=1362499746&fmt=json&callback=doWindsCallback

 

Posted on

github commands

notes

I guess, because I didnt have this blog last year, I couldn’t find my notes about git and github repositories.

So I ran into situations where I tried to send committed projects from the local repository to the github – without realizing that I needed to pull any commits down from github first, using:

# git pull origin master

Merging just doesn’t seem to work well at all. So my advice to self would be, always pull from github before you start working on your code. Or even when you create a new github with a README.md file.

Useful commands:

add new file:

git add filename

commit any changed files

git commit -a -m "this is a commit"

send commits up to github

git push origin master

 

 

 

 

 

Posted on

sending Tweets from Max using ruby, xively.com, and zapier.com

This is a ruby version of the Max tweetCurl5 patch (which tweets via xively.com) described here:

https://reactivemusic.net/?p=5447

In this version, the Max patch communicates via OSC to a background server running in ruby. An advantage of this method is that both the patch and the server are  compact and easy to understand. The Max patch does things in a Max way. And likewise with the ruby script.

Here’s a screen shot of the Max patch:

 files

Max

  • ruby-max-tweet.maxpat

ruby

  • ruby-max-tweet.rb

The ruby script requires installation of the following gems

  • patron
  • osc-ruby

For example:

# gem install patron

authorization

  • The xively.com feed id and api-key are embedded in ruby script
  • To get this project to work you’ll need a Twitter account. And you’ll need to set up a device (feed) at xively.com and a ‘zap’ at zapier.com as directed in this post. It explains how to send tweets using triggers. https://reactivemusic.net/?p=6903

instructions

  • Open the Max patch: ruby-max-tweet
  • In a terminal window run the ruby script:
  • # ./ruby-max-tweet.rb
  • In the Max patch, type in a tweet. Press the green button to send.
  • When you have Tweeted enough, end the ruby server program by typing <ctrl-c>

download

The files for this project can be downloaded from the intenet-sensors archive at github

https://github.com/tkzic/internet-sensors

Posted on

ipadOscMidi app with Max patch

Have set up a Github repository for the ipadOscMidi simulator app: https://github.com/tkzic/ipadoscmidi

There is also a companion Max patch for testing

Here is the README file for the project:

ipadMidiOsc
-----------
March 4, 2013
version 1.0

This program is a simulator to test Midi and Osc communication in iOS. There is a companion Max/MSP patch in the archive (oscmiditest3.maxpat). The Max patch lets you control the user interface on the iPad. And it well display incoming messages from the iPad.

I have only tested the default iOS midi networking devices via Mac OS, and an iRig Midi interface. 

This is the only documentation right now - but there are big plans, yeah, for a programming guide, and a free app store app, along the lines of audioGraph.

I wanted to get this initial version out before the spacecraft lands in the backyard.

Acknowledgements:

The Midi code was derived from PGMidi by Pete Goodliffe
The Osc code was derived from OscPack by Ross Bencina

Thank you.

Tom Zicarelli
[email protected]

Notes:

Local Project files are in: tkzic/oscapps/ipadmiditest4

I made the update described here for iOS 6 compatibility:

http://stackoverflow.com/questions/12548856/coremidi-pgmidi-virtual-midi-error-in-ios6