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
Standard Grade Bitesize French - Talking about yourself : Revision 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
How to Improve Your Drawing Skills | Curious.com Disappointed by your doodles, and wish you could draw better? Drawing well is about your hand being able to do what your brain tells it to do. And if your hand doesn’t have much practice at creating certain shapes or lines, the end result of your sketching may not look at all like it did in your mind’s eye. If you can hold a pencil or pen, you can expand your drawing skills by working on fun projects you'll enjoy!
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.
Web Resources To Improve Productivity How to make Char Cord / Char Rope Pearltrees Radically Redesigns Its Online Curation Service To Reach A Wider Audience Pearltrees, the Paris-based online curation service that launched in late 2009, was always known for its rather quirky Flash-based interface that allowed you to organize web bookmarks, photos, text snippets and documents into a mindmap-like structure. For users who got that metaphor, it was a very powerful service, but its interface also presented a barrier to entry for new users. Today, the company is launching a radical redesign that does away with most of the old baggage of Pearltrees 1.0. Gone are the Flash dependency, the tree diagrams, the little round pearls that represented your content and most everything else from the old interface. Here is what Pearltrees 1.0 looked like: And here is the new version: Pearltrees’ mission is still to allow you to organize everything you want on the service (in that respect, it almost competes with Evernote). 3. “We took what everybody liked about the old version and put it into a visualization that everybody could grasp right away,” Lamothe said.
How to Make Char-Twine 50 Top Sources Of Free eLearning Courses - Getting Smart by Guest Author - EdTech, elearning, IOLchat Email Share September 30, 2012 - by Guest Author 194 Email Share “50 Top Sources Of Free eLearning Courses” by Julie DeNeen first appeared on informED. Whether you are looking for a master’s degree program, computer science classes, a K-12 curriculum, or GED study program, this list gives you a look at 50 websites that promise education for free. From databases that organize over 1,000,000 students throughout 16 universities, to a small library of documents for those interested in history, the opportunities for free online learning continue to expand as the Internet becomes a crucial component in education. 1. The UMass courseware offers a broad range of classes in areas like psychology, biology, early education, political science, history, mathematics, and others. There are no slides, videos, or lecture notes, which makes this open courseware inferior to other universities that offer extensive resources. 2. This website has a variety of video lessons for free. 3. 4. 5. 6. 7. 8. 9. 10. 11.
Wimoto motes - Your Sixth Sensor Wimotos are a family of small, wireless sensors for your iPhone, iPad, Android, Linux or Raspberry Pi device that measure environmentals such as ambient temperature, humidity, light, soil moisture, soil temperature, object temperature, human presence and movement. They last for about a year on a single battery and don't require an Internet connection to work. You can upload your data to our cloud service for analysis via our free app, or use the optional Wimoto Cloud Cube to do it for you in realtime via Wifi. Instead of launching a weather app, wouldn't it be nice to know what the weather right outside your home is right now? Or if it's too dry or cold at night in your baby's bedroom? Or how long it take my fridge to cool down every time the door is opened? The Climote has literally hundreds of uses where you need precision temperature, humidity and light information. Imagine coming home from work, and your lawn telling you that it needs to be watered? A Great Looking App Press Coverage
Say what you type in French : Say what you type in Spanish the best way to start with French and Spanish! Choose the language you want to listen your text, type your text in your selected language then click on "say it". You can change the character or the voice if you want. Use this keyboard for foreign accents: How to make a tool set Life without tools is barbaric. But even simple tools can be expensive in rural parts of developing countries. Import duties bump the costs up higher than they are in the States or elsewhere, and sometimes only low-quality brands are available anyway. So, to hold off future barbarians, we'd like to show how to build a simple tool set on a very low budget. Larry Bentley, the man who figured out how to make these tools, said a wise thing: "Without tools, kids don't take stuff apart, and without taking stuff apart, you don't learn how things work." These tools, Bentley says, could be in the hands of the next William Kamkambwa,who made a working wind power generator from backyard scraps in a village in Malawi. Here's Larry's quick guide to DIY tools. The tools in this guide: Saw Pliers Wooden vice Wood drill bit / star drill bit Chisel Strap hinge vice
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