Breathalyzer: Calibrating the MQ-3 Alcohol Sensor. Arduino Breathalyzer: Calibrating the MQ-3 Alcohol Sensor Davide Gomba — September 23rd, 2010 [Nootropic Design] explains the use (and the approach) to one of the most interesting sensors I’ve seen lately: the MQ-3 alcohol sensor: The MQ-3 is an alcohol gas sensor that is available for about $5 from Sparkfun, Seeed Studio, and others. It’s easy to use and has sparked the imagination of anyone who has dreamed of building their own breathalyzer device for measuring the amount of alcohol in the human body. I got an MQ-3 sensor a couple of months ago and have spent a lot of time trying to figure out how to do this. After lots of “data gathering”, I found that this task is not as easy as it sounds. The electronic circuit is explained and Standard Firmata used to visualize the data in Processing.
The most interesting part in the article is when [Michael] tries to calibrate the sensors, by calculating the BAC (blood alcohol content). via [nootropic] Medical and Health Related Projects with Arduino. BITalino.pdf. What is " uint8_t" Arduino - How can a let my atmega328 run for a year on batteries? Communication between XBee and Processing - Processing 2.0 Forum. Xbee-api. The 74HC595 Shift Register | Arduino Lesson 4. Eight LEDs and a Shift Register. Before I go through the code, let's have a quick look at what the chip is doing, so that we can understand what the code has to do.The chip is of a type called a shift register.
The shift register holds what can be thought of as eight memory locations, each of which can be a 1 or a 0. To set each of these values on or off, we feed in the data using the 'Data' and 'Clock' pins of the chip.The clock pin needs to receive eight pulses, at the time of each pulse, if the data pin is high, then a 1 gets pushed into the shift register, otherwise a 0. When all eight pulses have been received, then enabling the 'Latch' pin copies those eight values to the latch register. This is necessary, otherwise the wrong LEDs would flicker as the data was being loaded into the shift register. The chip also has an OE (output enable) pin, this is used to enable or disable the outputs all at once. 06_02_14_5 Day Summer Semester. Final Lightbar Controller. I've finished the lightbar controller! This device analyses the music it picks up via the electret microphone, then flashes the LEDs in time to the music. It's encased in the box SparkFun sent me the microphones in, since the box was just begging to be used as a case for something!
I'm sure that was intentionally designed. Getting a bit more technical: The microphone picks up the noise and sends this to the LM386 amp, which amplifies it about 200x before it's read by the ATtiny13's ADC at 8-bit resolution. The ATtiny13 then keeps a running average of the noise level, and flashes the LEDs if the current volume exceeds the average by a scalar amount. As a result, the LEDs flash on when the music hits a peak, and are off otherwise - no matter what volume. Check out the video of it in action: Download the schematic, PCB layout, code: (all files released under Creative Commons BY-SA-NC 3.0). Connecting Arduino to Processing. Contributors: b_e_n Share Use this URL to share: Share on Twitter Share on Facebook Share on Google+ Introduction So, you’ve blinked some LEDs with Arduino, and maybe you’ve even drawn some pretty pictures with Processing - what’s next? At this point you may be thinking, ‘I wonder if there’s a way to get Arduino and Processing to communicate to each other?’.
Well, guess what - there is! - and this tutorial is going to show you how. In this tutorial we will learn: How to send data from Arduino to Processing over the serial portHow to receive data from Arduino in ProcessingHow to send data from Processing to ArduinoHow to receive data from Processing in ArduinoHow to write a serial ‘handshake’ between Arduino and Processing to control data flowHow to make a ‘Pong’ game that uses analog sensors to control the paddles Before we get started, there are a few things you should be certain you’re familiar with to get the most out of this tutorial: From Arduino...
First things first. Ok. Ta-Da! Ok! Using EAGLE: Board Layout. Favorited Favorite 8 Previously on Using EAGLE EAGLE’s board designer is where a good portion of the magic happens. It’s here where the dimensions of the board come together, parts are arranged, and connected by copper traces. In the board editor, the conceptual, idealized schematic you’ve designed becomes a precisely dimensioned and routed PCB. In this tutorial we’ll cover every step in EAGLE PCB design: from placing parts, to routing them, to generating gerber files to send to a fab house. Create a Board From Schematic Before starting this tutorial, read through and follow along with the Using EAGLE: Schematic tutorial (not to mention the Setting Up EAGLE tutorial before that).
The schematic from previous tutorial, complete with an ATmega328P, barrel jack connector, LEDs, resistors, capacitors, and connectors. To switch from the schematic editor to the related board, simply click the Generate/Switch to Board command – Layers Overview EAGLE’s Layers Selecting From Overlapping Objects Whew!
. Using EAGLE: Schematic. Favorited Favorite 6 Introduction PCB design in EAGLE is a two-step process. First you design your schematic, then you lay out a PCB based on that schematic. EAGLE’s board and schematic editors work hand-in-hand. A well-designed schematic is critical to the overall PCB design process. This tutorial is the first of a two-part Using EAGLE series, and it’s devoted entirely to the schematic-designing side of EAGLE. Suggested Reading If you’d like to follow along with this tutorial, make sure you’ve installed and setup the EAGLE software.
We’d also recommend you read and understand the concepts behind these tutorials: Create a Project We’ll start by making a new project folder for our design. Give the newly created, red project folder a descriptive name. Project folders are like any regular file system folder, except they contain a file named “eagle.epf”. Create a Schematic The project folder will house both our schematic and board design files (and eventually our gerber files too). .
Finally! How to Install and Setup EAGLE. Favorited Favorite 9 Introduction Printed circuit boards (PCBs) are the backbone of every electronic gizmo out there. They’re not flashy like those microprocessors, or abundant like resistors, but they’re essential to making all components in a circuit connect together just right. We LOVE designing PCBs here at SparkFun. It’s a love that we want to spread. It’s a skill that benefits electronics enthusiasts of every caliber. This first tutorial goes over how to install the software, and tailor-fit its interface and support files. Why EAGLE? EAGLE is one of many PCB CAD softwares out there. Cross-platform – EAGLE can run on anything: Windows, Mac, even Linux. Of course, EAGLE has its drawbacks too. Recommended Reading Here are a few tutorial and concepts you may want to familiarize yourself with before dropping down into this rabbit hole: Download, Install, Run EAGLE is available on Cadsoft’s (the developer company) download page.
Licensing EAGLE Exploring the Control Panel Keep Both Windows Open! Ardublock. Easy Driver Examples. Easy Driver Examples Sample code and projects to get your stepper running! Lots of folks buy EasyDrivers or BigEasyDrivers and then get them to work just fine in their project. But some don't, and so I thought it would be a good idea to write down some simple instructions for getting your Easy Driver working as quickly and easily as possible. All of these examples are going to be done with my Easy Driver and Big Easy Driver stepper motor driver boards driving several different random stepper motors I have lying around the lab. I will be generating the step and direction pulses with an Arduino UNO and a chipKIT UNO32, although all of these examples should work with any Arduino or Arduino clone or Arduino compatible (like all chipKIT boards).
And don't forget to read Dan Thompson's excellent Easy Driver tutorial blog post if you want to read more up on this stuff. Note1: All examples will work equally well with Easy Drivers or Big Easy Drivers. It doesn't get much simpler than that. Bildr. High Sensitivity Arduino Sound Level Detector. Generally we want to sense the environment when something interesting is occurring. Sometimes the presence of sound is indicative of an interesting activity. If we can detect sound level we can trigger a sensing activity to capture information about the activity of interest. I have posted a short video of this simple high sensitivity Arduino sound level detector working. In this project we use an Arduino Uno, an electret microphone and an LM358 dual operational amplifier to create a simple sound level detector. The signal from the mic is amplified by the one side of the LM358 with a gain of approximately 221 (see op-amp wiki) as defined by the 220k feedback resistor and the 1k pull down resistor connected to the negative input of the LM258 amplifier.
The output of the first stage amplifier provides input to the other side of the LM358 used as a comparator. The triggering threshold of the comparator is controlled using the potentiometer. The actual breadboard prototype appears below: Resources. You had such a great time learning to solder your Simon that now you want to take that leap and learn how to program Arduinos. Luckily the Simon uses the same microcontrollers as Arduinos so you can learn how to add an analog sensors to the Simon and then reprogram it with a FTDI cable. Learn the four basic skills of microcontroller programming: Analog, Digital, Input and Output. Concepts that will be covered include: Software setupInput/ OutputDigital / AnalogSerial CommunicationInternal pull-up resistors PowerPoint Presentation Tutorial Re-Programming the Simon Says Example Code Simon Says Github Repo Material by Pete Lewis and Linz Craig Design by Amanda Clark. Stepper Motor Quickstart Guide. Stepper Motor Quickstart Guide Skill Level: Beginner by Joel_E_B | January 03, 2013 | 26 comments Stepping Up to the Challenge There are a handful of motors to choose from, and sometimes it’s unclear as to which one will be best suited for your particular application.
In this tutorial, we will discuss one of these motors, the stepper motor, and when it best to choose a stepper motor over the alternatives. We will also discuss how to use this motor with the EasyDriver Stepper Motor Driver board, one of the simplest driver boards around. Requirements Here is a list of recommended items needed to follow along: How it Works Stepper motors vary from regular DC motors in that, rather than just spinning in one direction or another, they can spin in very precise increments.
Stepper motors can move an exact amount of degrees (or steps) when told to do so. There are numerous varieties of stepper motors as well as driver boards with which to control them. How to Use it Assembly Hook-up Firmware Going further. SIK Guide v3. Makers the new industrial revolution - chris anderson [qwerty80] Medical and Health Related Projects with Arduino. Www.seas.upenn.edu/~ese111/Fall2012labs/FinalProject-Part1. Introduction to Hardware Hacking with Arduino. Welcome to the Arduino tutorial I wish existed when I started hardware hacking. Learn how to send an SMS text message in Python by pushing a button on your Arduino!
A couple years ago I was very new to hardware hacking, hadn't touched a solder in over a decade, never used an Arduino or Raspberry Pi. I wanted to play around with an Arduino but I didn't know where to begin. In the Fall of 2012 I joined Tindie as the first employee; Tindie is a marketplace for all things electronics (printed circuit boards to robots to drones) and that fueled my interest in hardware even more. I'm a software engineer, love programming and preferred to program in Python on my Arduino instead of learning another new language. The tutorial is for you if: You have never used an Arduino or have some experience and want to learn how to run Python programs on your Arduino. Background Arduinos are awesome! This is why Arduino is called a platform. To quote SparkFun: Purchasing an Arduino My very first Arduino. Unboxing. LilyPad Arduino Projects. Microcontroller - How to Get Ambient Temp from Arduino Lilypad Temperature Sensor.
How to determine whether a computer is running a 32-bit version or 64-bit version of the Windows operating system. This article automatically determines whether a computer is running a 32-bit or 64-bit version of Windows. This article also describes how to manually determine whether a computer is running a 32-bit or 64-bit version of Windows. Generally, a computer's bit count indicates how much data it can process, the speed with which it can process the data, and the maximum memory capacity. In order to optimize the computer's performance, the bit count of the operating system that is installed on the computer should match the bit count of the computer itself. You are currently using a 32-bit operating system. Use the following methods to determine which version of Windows is installed, as appropriate for the operating system that you are running.
Windows 8 There are two methods that you can use to determine whether you are running a 32-bit or 64-bit version of Windows 8. Method 1: View the System window in Control Panel Swipe in from the right edge of the screen, and then tap Search. Windows XP.
Dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/AVR/Tiny_Programmer_v11.pdf. Make: Wearable Electronics: Tools and techniques for prototyping interactive wearables (Make : Technology on Your Time): Kate Hartman: 9781449336516: Amazon.com. Full Demonstration of all LilyPad components. The LilyPad Electronic Platform is an electronic platform designed to be easily sewn into fabric using conductive thread, which provides designers freedom from the traditional construction method of soldering.
The LilyPad consists of 3 sensors (temperature, light, and acceleration), a button board, and 4 kinds of output devices: a tri-colored LED, a white LED, a sound board, and a buzzer board. This Instructable shows you how to construct a full demonstration of the LilyPad's functions. When discussing soft circuit components, especially when talking to those unfamiliar with electronics, it's extremely useful to be able to point to a physical device demonstrating how components connect to another and their possible functionality.
In that vein, I sewed together all the LilyPad components (with the exception of the XBee) and wrote a small script that ties each sensor to an output device. The video below demonstrates all the functionality of all components. Grants | Qatar Foundation International. Profiles in Courage: United For Syria 17-year-old QFI Community Service Grantee, Abdulhassib Al-Jandali, sheds light on the humanitarian crisis in Syria through his campaign United For Syria. For more information about the campaign: fb.com/united4syria | @unitedf0rsyria Profiles in Courage: An Interview with UNHCR While visiting refugee camps in the Beqaa Valley, QFI spoke to Lisa Abu Khaled, Public Information Assistant at UNHCR Lebanon. The Road to Doha QFI's Road to Doha program helped train and bring together youth from Qatar, the U.S., Brazil and Argentina to better understand and develop solutions to critical global issues and to more effectively raise environmental awareness.
The Future We Want In June 2012, Youth Ambassadors for Science and the Environment traveled to Sao Paulo, Rio de Janeiro, Caravelas and Abrohlos National Marine Park before heading to Rio+20 Earth Summit. YALLAH: Commit to Action, Minnesota Madeleine Albright Visits Lindblom On April 10, 2012, Former U.S. _posts/2011-09-04-servo-photoresistor-arduino.md at master · nrdufour/nemoworld.info. Arduino Candygrabber. DS1307 RTC tutorial. Camera + Turntable + Laser = 360° Scanner.