DIY Polygraph Machine: Detect Lies with Tin Foil, Wire and Arduino DIY Polygraph Machine: Detect Lies with Tin Foil, Wire and Arduino Lying is awesome. From a very young age, children learn that flat out denying the truth gets you out of trouble and helps keep you calm in the face of horror. But what happens when you just have to know if someone, say, used your toothbrush? You could ask them to take an expensive and arduous polygraph test. If you're industrious and don't have the dough for a legit polygraph, you can make your very own galvanic skin response (GSR) device. Today, we will make a cheap GSR device and learn if our toothbrush is really safe after all. Materials ArduinoAluminum foilVelcroWire10k resistorBreadboard Step 1 Make the Electrodes GSR machines require an even and consistent connection to the skin in order to function properly. Begin by taping the exposed end of a wires to a sheet of foil. Adhere a strip of Velcro over the tape and cut off the extra foil. Last, add a single piece of Velcro at the end of the foil side. Step 3 Load the Code
Après les imprimantes et les photomatons, voici le scanner 3D 01net le 13/03/13 à 12h02 Bre Pettis, le patron de MakerBot. L’appareil n’est encore qu’un prototype, mais les promesses sont alléchantes. Lors de la conférence South by Southwest (SXSW), qui se tient à Austin (Texas), l’entreprise américaine MakerBot a dévoilé un premier prototype de scanner 3D, baptisé 3D Digitizer, le principe est simple: à l’aide de caméra et de lasers, ce scanner crée une représentation numérique en trois dimensions de l’objet posé sur son socle. Cette pièce peut alors être reproduite à l’aide d’une imprimante 3D. « Ce n’est pas de la science-fiction, c’est réel », se félicite Bre Pettis, le patron de cette startup basée à New York. Fabriquer ses propres objets MakerBot est l'un des pionniers de l'impression 3D grand public. Mais la société voit plus loin : elle souhaite démocratiser cette technique. « Un jour, chaque entreprise, chaque école, chaque maison auront leur imprimante 3D, prophétise Bre Pettis. La compétence technique n'est plus nécessaire
Top 10 Things You Can Upgrade with a Little Electronics Hacking it is a skill to do a good solder joint, it comes with LOTS of practice. so most people who rarely do it will ever get good at it. Bingo. Of course, part of the issue is having a soldering iron at the right temp with a properly tinned tip. Newbies aren't using soldering stations but a cheap iron they got at rat shack (You have questions? We have deer-in-the-headlights... erm... answers!). I don't expect to ever master tricky stuff like smts or even multilayer pcbs so I'm not much better then a newbie, anyway - and I totally suck at sweating pipe joints. Ah, well... SMT is actually a bit better than through-hole once you get the hang of it.
Impression 3D internet Top 10 DIY Tech Gifts @keyboard-vomit: Yeah, but wouldn't it be awesome if some of our not so tech friends actually attempted (and accomplished) one or more of these feats? I mean, when "it's the thought that counts," shouldn't it be a thought about something we'd actually appreciate. Then again, maybe socks are your thing. ;) @HunterShoptaw: That they are, I'm wanting some socks with an integrated HDD, and some USB connectivity. @HunterShoptaw: The thought does count, but it sure would be nice if they enjoyed the gift too. So for this year, I created wishgenies dot com for people who WANT to give good gifts, but don't know what they'll want. @keyboard-vomit: I swear that some day, some how...Google will be able to find my lost socks.
Open Source Ecology Electronic Projects For Beginners I made a guide for those people who are still starting with their electronics hobby. I started connecting wires, batteries, bulbs, buzzers and motors when I was 4 years old . Now that I am 13 years old, I now have a good amount of experience to build complicated electronic circuits. It took me hours to finish making this guide since there is no software editor in the Sibmit>Guide in the "Submit Instructable Section" I had to type every word and picture using HTML codes which I learned from school. These are my all time favorite projects in instructables, I find them simple and easy to make. How To Solder by: noahw Third Hand by: rstraught Making A Customized Circuit Board by: ASCAS How I built a Solar iPhone Charger ($50) by: akbrennan Make a USB iPhone iPod Charger On The Cheap! Build a Simple Circuit from a Pizza Box (No Soldering) by: matt.e.jenkins Solar Cockroach Virbobot by: JoshuaZimmerman Water Powered Calculator (Original) by: ASCAS Munny Speakers by: fungus amungus
ATTENTION : l'impression 3D pas forcément libre ! Lesson Plan for Making a Speaker Laboratory ©1995 The Regents of the University of California by Regan Lum Introduction: A speaker is a device that converts an electronic signal into sound. The speaker you will build (see figure 1) consists of a Styrofoam or paper cup, a coil of wire, a permanent magnet, and a signal source. The electronic signal goes through the coil and creates a varying electromagnet. figure 1 Purpose: In this laboratory, you will explore how a speaker works. Materials: 1 permanent magnet 2 feet of wire 1 pencil tape or glue 1 Styrofoam or paper cup 1 signal source (tape player) 1 plug with alligator clips for tape player Procedure: Assemble material as shown in figure 1. Leaving about 10 centimeters on the end, wrap the wire around a pencil to make a wire coil and tape or glue it to the bottom of the cup. Conclusion Does the volume control on the tape player work on your speaker? Return to CEA Science Education Home Page