Seeking Wisdom » resistor color codes As a teacher, I’m always on the lookout for new and interesting ways to promote learning in my classes. As a geek, its cool to find ways to do that with technology. I recently found out about an awesome website, Merlot.org, that serves as a place for teachers of all disciplines to share lessons and information. Nick Reeder, of Sinclair Community College in Ohio, has come up with some “Challenge” games that I really like: The Metric-Prefix Challenge helps students practice and learn their metric prefixes. Test equipment is essential to troubleshooting and observing electronic circuits. Understanding and remembering resistor color codes is critical to successful circuit analysis. Another very cool tool, from David Shaheen at Owen Community College, is the Resistor Placement Game. Tools like these are great for visual and kinesthetic learners, but they are fun for almost everyone!
Ohm's law V, I, and R, the parameters of Ohm's law. where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is constant, independent of the current.[3] The law was named after the German physicist Georg Ohm, who, in a treatise published in 1827, described measurements of applied voltage and current through simple electrical circuits containing various lengths of wire. He presented a slightly more complex equation than the one above (see History section below) to explain his experimental results. In physics, the term Ohm's law is also used to refer to various generalizations of the law originally formulated by Ohm. History In January 1781, before Georg Ohm's work, Henry Cavendish experimented with Leyden jars and glass tubes of varying diameter and length filled with salt solution. Scope .
Dr. Monk's DIY Electronics Blog Seeking Wisdom Get the Grammar Right I had a little meltdown this week after reading about 30 of those silly pictures on Facebook that people put the funny captions on… well, they would be funny if they were grammatically correct. I just couldn’t take it any longer, so I had to post a comment. Whether you are sending a text, posting on Facebook, or writing a paper for one of my classes, taking the time to keep your writing grammatically correct is important on multiple levels. Ohm’s Law Calculators Online Some students have problems visualizing the application of Ohm’s Law and the equations for voltage, current, resistance, and power. *The use of these tools to get homework and practice answers will not help make you smarter or promote understanding! Keep Track of Your Grades This MS Excel spreadsheet can be used to set and compute grades for all your classes! The directions are on the front page and its pretty self explanatory. Games for Learning Electronics Metric Number Line with Mnemonics Finally, M.
Sewable Electroluminscent (EL) Wire Welted Piping- Aqua 5 meters ID: 675 - $19.95 EL Wire, also known as Electroluminescent wire is a stiff wire core coated with phosphor and then covered with a protective PVC sheath. When an AC signal is applied to it, it glows an aqua (blue green) color. It looks a little like thin neon. Very bendable, it keeps its shape and you can curl it around your finger. Its an easy way to add some glow to a project, not as bright as LEDs but uses a lot less power! This particular model is standard 2.3mm thickness EL wire, with a clear coat, pre-cut and soldered to a standard quick-connect EL wire. This is not our high-brightness EL (it wasn't available in piping form), so it is dimmer than the non-welted kind we carry. Often used for costuming, decoration, accent lighting, safety vests, bicycle/motorcycle/car/boat/home decoration, signs, etc! To use, the wire must be connected to an inverter that provides an AC supply of approximately 100V at 2000 Hz. We used EL wire to make our awesome TRON bag so check it out for ideas Please note!
Make PCBs at home with magazine paper and your laser printer How to make PCBs at home in 1 hour & W I T H O U T special materials What you need You need also: a blade cutter, scotch tape, sandpaper, kitchen paper, cotton wool, vice, hacksaw. How it works Laser printers and photocopiers use plastic toner, not ink, to draw images. Finding the right paper The perfect paper should be: glossy, thin, and cheap. Paper preparation I discard pages heavily printed, preferring pages with normal-size text on white background. Printer setup Laser printers are not designed for handling thin, cheap paper, so we must help them feeding the sheets manually instead of using the paper tray. Printing Disclaimer: your laser printer is not designed to handle this kind of paper. This is my PC thermometer circuit printed on IEN magazine paper. How to cut raw material PCB material is fibreglass like, and a trick to cut it effortlessly is to score a groove with a blade cutter or a glass cutter. Cleaning the board for transfer Preparing for transfer Iron it! Peeling The hanger tool .
CircuitLab | sketch, simulate, and share your circuits Fade-Out Chair by Nendo The Fade-Out Chair has a simple shape made of wood for the back and acryl for the legs. Designed by Nendo, a Japanese designer, the design combine between modern and traditional design styles into one furniture of chair. The Fade-Out chair looks floating on the air because of its legs which seem to gently disappear. Design of Furniture PD5 series, China DIY fiber light Manufacturer & Supplier Basic Specification Detail Description Product name: Fiber optic DIY kitsItem No.: PD5-0.75-250Light engine: 5W LED light engine, with touching remote.Color: RGBFiber type and q. T. Y.: 0.75mm 250PCS at the length of 3mPackage: One set on card, 5sets/CTNApplication: Star ceilingOEM order is welcome Additional Information About Us Sichuan Huiyuan Plastic Optical Fiber Co.,Ltd Sichuan Huiyuan Plastic Optical Fiber Co.,Ltd is a high-tech company specialized in researching, manufacturing and marketing of Low-loss PMMA plastic optical fiber ,optical cable as well as its applications.We are standard-setter of POF in China and we are the first company to involved in this area. General Information Export Information Productivity Information
Gear template generator program The gear template generator program is a program for printing paper templates for cutting out gears. It can do everything that the online gear template generator can do, and much more. Things that the offline gear template generator can do: Involute spur gears (spur, ring, and rack) Planetary gear sets (using ring gears) Calculate small gear tooth undercut shapes Lantern / cycloid gear pairs Block chain and roller chain sprocket calculations Print gears across multiple pages Show grids with diagonals to help align multi-page printouts Support for metric and inches dimensions Right angle gear mode see hereNo internet connection required Export DXF, HPGL, CSV, Sketchup, PDF and bitmaps For more details, see the Online help or watch the Demonstration VideoThe doumentation is also available in French but the program is English only System requirements: Windows XP, Vista, or 7 or 8.