North East Blog Directory

January 02, 2015

Transitlab

Dust sensor

The Sharp’s GP2Y1010AU0F dust sensor is worth a play.

I followed the instructions from http://sensorapp.net/?p=479 for connecting.
Substituted used 150ohm, and 183uf 25v capacitor for the 250uf in the circuit.

Seemed to work.

Programs follow

int dustPin=0;
int dustVal=0;

int ledPower=2;
int delayTime=280;
int delayTime2=40;
float offTime=9680;
void setup(){
Serial.begin(9600);
pinMode(ledPower,OUTPUT);
pinMode(4, OUTPUT);
}

void loop(){
// ledPower is any digital pin on the arduino connected to Pin 3 on the sensor
digitalWrite(ledPower,LOW); // power on the LED
delayMicroseconds(delayTime);
dustVal=analogRead(dustPin); // read the dust value via pin 5 on the sensor
delayMicroseconds(delayTime2);
digitalWrite(ledPower,HIGH); // turn the LED off
delayMicroseconds(offTime);

delay(3000);
Serial.println(dustVal);
}

Processing Code

// Graphing sketch

// Created 20 Apr 2005
// Updated 18 Jan 2008
// by Tom Igor
//edited using http://arduinobasics.blogspot.co.uk/2012/07/arduino-basics-simple-arduino-serial_09.html to make it work 
// This example code is in the public domain.

import processing.serial.*;

Serial myPort; // The serial port
int xPos = 1; // horizontal position of the graph

void setup () {
// set the window size:
size(400, 300); 

// List all the available serial ports
println(Serial.list());
// I know that the first port in the serial list on my mac
// is always my Arduino, so I open Serial.list()[0].
// Open whatever port is the one you're using.
myPort = new Serial(this, Serial.list()[0], 9600);
// don't generate a serialEvent() unless you get a newline character:
myPort.bufferUntil('\n');
// set inital background:
background(0);
}
void draw () {
// everything happens in the serialEvent()
}

void serialEvent (Serial myPort) {
// get the ASCII string:
//String inString = myPort.readStringUntil('\n');
String inString = new String(myPort.readBytesUntil('\n'));
if (inString != null) {
// trim off any whitespace:
inString = trim(inString);
// convert to an int and map to the screen height:
float inByte = float(inString); 
inByte = map(inByte, 0, 1023, 0, height);

// draw the line:
stroke(127,34,255);
line(xPos, height, xPos, height - inByte);

// at the edge of the screen, go back to the beginning:
if (xPos >= width) {
xPos = 0;
background(0); 
} 
else {
// increment the horizontal position:
xPos++;
}
}
}

 

by Brian at January 02, 2015 10:07 PM

January 01, 2015

Jon Bradford

jdbradford

Success has many fathers (and mothers).

As the year passes from 2014 to 2015, we reflect on that which has gone before and what lies before us. However in my instance a single post is not enough. Just over 5 years ago, I launched the Difference Engine, the first Accelerator Bootcamp outside of the US – and since there has been a lot that has gone under the bridge in the interim.

For my personal sanity (and before dementia sets in), I will prepare short “where are they now” blog posts for each of the 9 accelerator programmes which I have run over the last 5 years – spanning the Difference Engine, Springboard and now Techstars. There are many people I who have been hugely influential during the period, including supporters, mentors, investors and most importantly the companies and entrepreneurs that have participated in each – which I will refer to in each of the respective blog posts.

I will apologise in advance, I am sure I will miss multiple people along the way – but I will update along the way.  And to begin with I will start with a short outline of how the Difference Engine came about.


by jon bradford at January 01, 2015 05:51 PM

December 26, 2014

Jon Bradford

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