Diode Watch

Scientific devices you can make at home: do you know of any good websites for ideas and...?

...information. (Here is one!)
This one is for making radios out of razor blades, and old rubbish.

http://bizarrelabs.com/foxhole.htm

I used to do this as an after-school club, about seven years ago. I bought Black and Decker hacksaw blades for the diode. The home made copper oxide diode works well as well. I seem to remember trying out copper sulphate in a biro tube at one point.

This incredibly cheap book shows you how to make a planet finder out of odds and ends. I'll tell you more about this, when it arrives:

http://www.amazon.co.uk/Discover-Planet-Watch-Year-Round-Make-Your-Own/dp/1562828746/ref=cm_cr_wr_img

If you look up 'astrolabe' on Amazon UK, there is a modern version of an astrolabe, which is a kind of celestial slide rule which shows you the heavens as they should be at a given day and time. You can use it conversely, so as to use the stars to tell the time and where you are facing. Medieval kings would fight wars for one of these. Now you can have one for 5 quid

Astronomy & Astrophysics is publishing the first detection of a magnetic field on the star Vega, one of the brightest stars in the sky. Using the high-sensitivity NARVAL spectropolarimeter installed at the Bernard-Lyot telescope (Pic du Midi Observatory, France), a team of astronomers detected the effect of a magnetic field (known as the Zeeman effect) in the light emitted by Vega.
Vega is a famous star among amateur and professional astronomers. Located at only 25 light years from Earth in the Lyra constellation, it is the fifth brightest star in the sky. It has been used as a reference star for brightness comparisons. Vega is twice as massive as the Sun and has only one tenth its age. Because it is both bright and nearby, Vega has been often studied but it is still revealing new aspects when it is observed with more powerful instruments.

Vega rotates in less than a day, while the Sun's rotation period is 27 days. The intense centrifugal force induced by this rapid rotation flattens its poles and generates temperature variations of more than 1000 degrees Celsius between the polar (warmer) and the equatorial regions of its surface. Vega is also surrounded by a disk of dust, in which the inhomogeneities suggest the presence of planets.

This time, astronomers analyzed the polarization of light emitted by Vega and detected a weak magnetic field at its surface. This is really not a big surprise because one knows that the charged particle motions inside stars can generate magnetic fields, and this is how solar and terrestrial magnetic fields are produced. However, for more massive stars than the Sun, such as Vega, theoretical models cannot predict the intensity and the structure of the magnetic field, so that astronomers had no clue to the strength of the signal they were looking for. After many unsuccessful attempts in past decades, both the high sensitivity of NARVAL and the full dedication of an observing campaign to Vega have made this first detection possible.

The strength of Vega magnetic field is about 50 micro-tesla, which is close to that of the mean field on Earth and on the Sun. This first observational constraint opens the way to in-depth theoretical studies about the origin of magnetic fields in massive stars. This detection also suggests that magnetic fields exist but have not been detected yet on many stars like Vega, but farther and more difficult to observe. Astronomers believe that this discovery will be a key step in understanding stellar magnetic fields and their influence on stellar evolution. As for Vega, it is now the prototype of a new class of magnetic stars and will definitely continue fascinating astronomers for years.

The team includes F. Lignières, P. Petit, T. Böhm, and M. Aurière (Laboratoire d'Astrophysique de Toulouse-Tarbes, CNRS/Université de Toulouse, France).

Radiation is not only characterized by its wavelength and its intensity, but also by its polarization state. The polarization state of waves, including light waves, describes the orientation of their vibrations. A light wave can either be non-polarized, linearly or circularly polarized depending on the orientation of the electric field as the wave travels. In particular, the polarization state of radiation gives information about the presence of a magnetic field in the medium where the radiation was emitted. Hence, polarization data allow astronomers to study stellar magnetic fields.

DIODE $12 When these electrical items fail there is little choice but to renew - With this genuine Suzuki par..

Unitech Wired - Photo Diode MS146I4G $106.01 Unitech Wired - Photo Diode MS146I4G

LightEmitting Diode $68.51 Light emitting diode. Oleg Losev, List of LED failure modes, Organic light emitting diode, Miniature light emitting diode, Solid state lighting, LED lamp, LED power sources, Electrical polarity of LEDs, LED circuit, LED as light sensor Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 74 Publication Date: 2009/10/08 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches

BWD DIODE - SC145 $15.99 MPN #SC145. BWD DIODE. Most Alternators products are available for in-store pickup from Advance Auto Parts.

BWD Isolation Diode - SC155 $14.99 MPN #SC155. BWD Isolation Diode. Most Alternators products are available for in-store pickup from Advance Auto Parts.

BWD Diode - X692 $31.99 MPN #X692. BWD Diode. Most Alternators products are available for in-store pickup from Advance Auto Parts.

BWD ISOLATION DIODE - SC154 $10.99 MPN #SC154. BWD ISOLATION DIODE. Most Alternators products are available for in-store pickup from Advance Auto Parts.

BWD Field Diode - SC526 $5.99 MPN #SC526. BWD Field Diode. Most Alternators products are available for in-store pickup from Advance Auto Parts.

Wasp Barcode Wired - Photo Diode 633808390365 $175.51 Wasp Barcode Wired - Photo Diode 633808390365

Kuryakyn Diode Kit $6.76 " This kit is required when installing LED. lights as turn signals on a motorcycle with a single turn signal indicator light If this diode kit is not installed, power will back feed across the indicator light and all turn signals will ff"

Laser Diode Microsystems $301.11 Laser Diode Microsystems provides the reader with the basic knowledge and understanding required for using semiconductor laser diodes in optical microsystems and microoptical electromechanic systems. This tutorial addresses the fundamentals of semiconductor laser operation and design, coupled with an overview of the types of laser diodes suitable for use in Microsystems, along with their distinguishing characteristics. Emphasis is placed on laser diode characterization and measurement as well as the assembly techniques and optical accessories required for incorporation of semiconductor lasers into complex microsystems. Equipped with typical results and calculation examples, this handon text helps readers to develop a feel for how to choose a laser diode, characterize it and incorporate it into a microsystem. Author: Zappe, Hans P./ Zappe, H. Series Title: Microtechnology and Mems (Hardcover) Binding Type: Hardcover Number of Pages: 355 Publication Date: 2003/10/10 Language: English Dimensions: 9.21 x 6.14 x 0.81 inches

Burton Diode EST Binding $399.95 Attention: Burton Snowboards & Gear can be shipped only within the United States and Canada.2012 Burton Diode EST Binding: Plug your boots into the NEW Burton Diode EST? binding and you?ll realize immediately that something is different. The revolutionary hinged heelhoop pushes flex in an entirely new direction, giving you a greater range of motion and the ability to pre-load your board for increased pop. The ShredBED 3.0 only adds to the sensation by enhancing feel, cushioning, and natural board flex from tip to tail. Oh, by the way?this is also Burton?s lightest binding ever by a landslide. No biggie.NOTE ? EST series bindings ride EXCLUSIVELY with Burton Snowboard featuring THE CHANNEL.

Transmission Lines and Schottky Diode $108.33 A nonlinear relation between current and voltage for schottky resonant tunneling diode is used. A general form of equation similar to VanDer Pol equation is obtained. A Resonant tunneling diode(RTD) has a negative differential resistance that means when the voltage increases the current decreases. This property is very useful for oscillators manufacture. Nonlinear transmission lines is considered to show that it canbe used in oscillators and to show that it can reshape the sinusoidal signals to othershapes by using OrCad and mathematica programming. Author: ElKhozondar, Hala J./ ElKhozondar, Rifa J./ Abo Ireban, Ibtisam Binding Type: Paperback Number of Pages: 80 Publication Date: 2011/07/12 Language: English Dimensions: 9.02 x 5.98 x 0.19 inches

DIODE ASSY $55 available at cmsnl.com - parts for a better ride

Diode Lasers $79.9 No Synopsis Available

600 Volt Diode - Bag 100(Pack of 2) $18.73 600 Volt Diode - Bag 100. American Terminal At-D1-100 Diodes. Specs: Heavy-Duty, 600V Diode; Use For Restricting Current Flow, Isolation & Clamping; 1 Amp; Bag Of 100. 1 Year.

Blue Ox 6-Amp Diode BX8864 $12.6 Blue Ox Electrical & Wiring in stock now! Read Blue Ox 6-Amp Diode BX8864 customer reviews. AutoAccessoriesGarage.com has the best selection of Blue Ox Towing & Hitches at the lowest prices around. Blue Ox 6-Amp Diode BX8864 are chosen by auto enthusiasts everywhere to personalize their vehicles. Blue Ox Tail Light Wiring Kit available now at AutoAccessoriesGarage.

Blue Ox 6-Amp Diode BX88159 $72 Blue Ox Electrical & Wiring in stock now! Read Blue Ox 6-Amp Diode BX88159 customer reviews. AutoAccessoriesGarage.com has the best selection of Blue Ox Towing & Hitches at the lowest prices around. Blue Ox 6-Amp Diode BX88159 are chosen by auto enthusiasts everywhere to personalize their vehicles. Blue Ox Tail Light Wiring Kit available now at AutoAccessoriesGarage.

Alchimie Forever Diode 1 + Diode 2 Age Defying Serums $89 These two age defying serums are packaged separately to maximize the benefits of the antioxidants derived from rosemary and green tea. This powerful combination tones and energizes the skin, providing an immediate firming effect. The skin is smoother and tighter after a single application. With continued use, these serums help diminish the appearance of fine lines and brown spots. Tighten and firm . Even out pigmentation . Reduce the appearance of fine lines Directions: Apply two pumps of Diode 1 over cleansed face and neck, morning and evening. Follow with Diode 2. Should be worn under moisturizer. Suitable for all skin types. Net Weight: (15 ml/0.5 oz.) x 2 Ingredients: Diode 1: Water/Aqua, Propylene Glycol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Cellulose Gum, Methylparaben, Chlorphenesin, Sorbitol, Phenoxyethanol, Ethylparaben, Propylparaben, Butylparaben, Isobutylparaben. Diode 2: Water/Aqua, Propylene Glycol, Camellia Sinensis (Green Tea) Leaf Extract, Cellulose Gum, Methylparaben, Chlorphenesin.

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MAKE presents: The Diode

could this laser work?

could this work with a 20x diode?http://www.metacafe.com/watch/756433/laser_flashlight_hack/

Good question, it looks like it should. I did notice it is a red laser, and he is close to his target when he uses it to acheive his goals.