mzgoddard

// Import the interface to Tessel hardware
var tessel = require('tessel');

var port = tessel.port.A;

var spi = new port.SPI({
  clockSpeed: 3.2*1000*1000, // 3.2MHz
  cpol: 0, // Polarity - optional
  cpha: 0, // Clock phase - optional
  chipSelect: port.pin[7] // Chip select - optional

mzgoddard

//
// Examples
//

mod examples {

    fn main() {
        // Different ways to get a single pwm pin.
        //
        // These earlier ones are a bit wasteful as they also create the leds

CyberShadow

/play
/*.png
/*.bmp
/solitaire

ajfisher

Servo PWM vs "Normal" PWM

This started from a chat in the [https://gitter.im/rwaldron/johnny-five](Johnny Five Gitter) and I thought I'd put some notes together because this comes up relatively often as people run into the terminology confusion that is caused by the Servo Manufacturers adopting the term PWM and it's usage amongst the Arduino community in relation to analogWrite().

This is my attempt at an explanation so if I've made any mistakes then please PR and we can make this better for everyone.

Servo is generally served by PWM support, right?

Sort of - PWM is typically a reference to an on/off duty cycle time - if I set my duty cycle to 50% then my pulses are on for 50% of the time and off for 50% of the time. If it's 10% then it's on 10% of the time, off 90%.

tcr

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.ssh.username = "root"
  config.ssh.password = "tessel2" 
  config.ssh.shell = "ash"

  config.vm.synced_folder ".", "/vagrant", disabled: true

  config.vm.box = "technicalmachine/tessel2"

ajfisher

Building an ultrasonic sensor backpack

Note: This is a bit of a scratch to see what's involved in getting the ping sensor to work as an I2C backpack.

Acknowledgements

• Jeff Hoeffs [http://github.com/soundanalogous](Sound Analogous) for guidance on using interrupts to do the time measurement on the ATTINY and [https://gist.github.com/soundanalogous/e94c6ebbc457b98b8383](providing a good example to work from)
• [http://github.com/rwaldron](Rick Waldron) for support of the backpack idea and keeping me moving. ;)

Dependencies.

boneskull

# CHANGELOG
# 3/22/15:
#   - updated keyring
#
# To setup ansible on Mac:
#   brew install ansible 
#   mkdir -p /usr/local/etc/ansible
#   mkdir -p /usr/local/share/ansible
# 
# To run:

Resseguie

var five     = require("johnny-five");
var Spark    = require("spark-io");

var board = new five.Board({
  io: new Spark({
    token: process.env.SPARK_TOKEN,
    deviceId: process.env.SPARK_DEVICE_ID
  })
});

TooTallNate

var $ = require('NodObjC');

$.import('Cocoa');

var installNSBundleHook = function() {
  var cls = $.NSBundle;

  if (cls) {
    var bundleIdentifier = cls.getInstanceMethod('bundleIdentifier');
    bundleIdentifier.setImplementation(function(val) {

monteslu

/*global chrome*/
var EventEmitter = require('./events.js').EventEmitter;
var util = require('./util.js');

function SerialPort(port, options) {


  var self = this;
  var id;
  var bytesToRead = options.buffersize || 1;