pearlchen’s gists

pearlchen / bash_functions

Created January 3, 2017 20:50

	function serve() {
	local host=`hostname`
	local port="${1:-8888}"
	(sleep 1 && open "http://${host}:${port}/")&
	python -m SimpleHTTPServer "$port"
	}

pearlchen / blinkTest.cpp

Last active August 29, 2015 14:25

2 different versions of the bare minimum code required to blink an LED on pin 13 (aka J17-14) using an Intel Edison and C++.

	#include "mraa.hpp"

	int main()
	{
	// set GPIO digital pin "13" to be an output
	mraa_gpio_context d_pin = mraa_gpio_init_raw(128);
	mraa_gpio_dir(d_pin, MRAA_GPIO_OUT_HIGH);

	// loop forever toggling the on board LED every second
	for (;;) {

pearlchen / gist:7a85cdc111f9f392be03

Created May 10, 2015 02:05

Xadow Touch Sensor

	// example code of touch numbers (replaces getTouchNumber)

	#include <Wire.h>
	#include "Seeed_QTouch.h"
	#include <SeeedOLED.h>


	void setup()
	{
	Serial.begin(9600);

pearlchen / lcd_text_helper.js

Last active November 8, 2015 04:37

Scroll text across your Grove LCD screen using JavaScript on the Intel Edison or Intel Galileo. Video: https://twitter.com/PearlChen/status/588890387260903424. And check it out within a larger project: https://github.com/pearlchen/iot-smart-desk-clock

	/* global setInterval: false, setTimeout: false, clearInterval: false, clearTimeout:false, module: false, console: false */

	/**
	* Module exports.
	*/

	module.exports = LcdTextHelper;

	/**
	* LcdTextHelper constructor.

pearlchen / intel-edison-grove-lcd-Jhd1313m1-example

Created April 14, 2015 02:23

Make a little * dance across your Grove LCD screen using JavaScript on the Intel Edison or Intel Galileo. Video: https://twitter.com/PearlChen/status/587808490405625856

	var mraa = require ('mraa');
	/*
	If you get any mraa missing errors, run this on your board:
	$ echo "src mraa-upm http://iotdk.intel.com/repos/1.1/intelgalactic" > /etc/opkg/mraa-upm.conf
	$ opkg update
	$ opkg install libmraa0
	*/

	var LCD = require ('jsupm_i2clcd');
	/*

pearlchen / convertDecToHex.html

Last active December 27, 2015 01:19

	<script>

	/** Convert a decimal number to a hex number. */
	function convertDecToHex(dec) {

	var BASE = 16,
	result = '';

	return getHex( dec );

pearlchen / Lighthouse.ino

Created October 19, 2013 19:43

Use analogWrite() to fade an LED up and down.

	int ledPin = 6; // Note that pin 13 on the Uno doesn't support PWM!
	int brightness = 0;
	int stepValue = 1;

	void setup() {
	pinMode(ledPin, OUTPUT); // sets the pin as output
	}

	void loop() {

pearlchen / multiple_angular_services.js

Created December 19, 2012 23:15

Need to create an AngularJS service that can implement multiple API URL paths, while also post "clean" data? This is my version for a solution. See the bottom of the gist for some more detail.

	// YOUR ANGULAR SERVICE
	clientApp.factory('Mongo', function($resource) {

	// $resource(url[, paramDefaults][, actions]);
	return $resource('http://localhost\\:8000/api/:action/:huddleId',
	{
	action: '@action',
	huddleId: '@huddleId'
	},
	{

pearlchen / moboto

Created November 25, 2012 18:43

Mr.Moboto draws a 'stauche

	#include <Servo.h>

	//Servo
	Servo armServo;
	Servo baseServo;
	const int ARM_SERVO = 9;
	const int BASE_SERVO = 10;

	// motor constants & limitations
	const int minArmServoPos = 30; //don't go lower, will hit the base

pearlchen / gist:4142125

Created November 25, 2012 02:14

Drawing Robot

	#include <Servo.h>

	//Servo
	Servo armServo;
	const int ARM_SERVO = 9;

	Servo baseServo;
	const int BASE_SERVO = 10;

	// drawing variables

Pearl Chen pearlchen