Rocket Boat. As our boats increased in speed over the years so did the problems we encountered in controlling them.
We did find some key design elements that worked well though. First, we found that a flat bottomed boat was much faster than a deep hulled boat as the water drag was reduced in this configuration. We also found that the boat needed to be sufficiently long so that the rockets did not push the front of the boat down under the water. The boat was also found to have stability issues at speed if it had a large, flat, upward sloping front. As such a boat would reach maximum speed, the air flowing under the angled front of the boat would lift the front of the hull, tumbling the boat in a spectacular backflip. A ne pas manquer : Dans la serre, il y a une maison et des gens qui vivent en autarcie! Suède – Maison naturelle : Près de Stockholm en Suède, un couple a décidé d’acheter une maison d’été et de l’envelopper dans une serre!
Pompes PCM MOINEAU. Pompes à rotor excentréMOINEAU En 1930, René Moineau obtient le titre de Docteur de la Faculté des Sciences de Paris sur présentation d'une thèse portant sur "le nouveau capsulisme" où est développé le principe de la pompe volumétrique à rotor excentré.Pour assurer l'exploitation de ce nouveau type de pompe, René Moineau s'associe avec Robert Bienaimé et avec l'aide financière du groupe Gévelot, crée la société Pompes, Compresseurs, Mécanique (PCM).
Principe de la pompe à rotor excentréCette pompe est constituée d'un rotor hélicoïdal tournant à l'intérieur d'un stator hélicoïdal. Le rotor en acier inoxydable est usiné avec une grande précision, le stator, lui, est moulé dans un élastomère résistant à l'abrasion.La géométrie et les dimensions de ces pièces sont telles que lorsque le rotor est inséré dans le stator, une double chaîne de cavités étanches alvéoles) est constituée.
Cliquer pour agrandir l'image. Arduino TCA9548A 1-to-8 I2C Multiplexer Arrives At Adafruit. Get creative with the Makeblock Arduino Starter Robot Kit. Learning programming is way more fun when your code controls a robot.
That is exactly the idea behind the Makeblock Arduino Starter Robot Kit, which currently has 46 percent off at TNW Deals. This introduction to robotics comes with beginner-friendly instructions, and there are two vehicles you can construct from this pack: a caterpillar-propelled tank, or a three-wheeled car. The parts are made from aluminum, which you bolt together to form a robust chassis. With an Arduino for a brain, each vehicle can be steered with code, and programmed to react to the commands you issue with the supplied remote control. Building these robots is also a great way to learn the fundamentals of electronics, although no soldering is required.
Homemade Speaker Explorations. Le transmetteur FM Ultime (Long Range Spybug) Have you ever wanted to broadcast your own radio station within your neighborhood?
Ever get curious on where people get those "Surveillance Bugs" from spy and action movies? Spy Circuits. This covers all the possible combinations for the greatest output with three transistors using a 3v to 9v supply.
If you want to improve any of the circuits we have covered, here are some helpful tips: 13. THIS DOESN'T WORK Some things that look theoretically possible, do not work in practice. It seems obvious, to increase the power output from a transmitter, simply put two transistors in parallel on the output. Ultrabright lampe LED d'urgence (rechargeable!) Preparing for a calamity or planning to go camping in the vast wilderness?
Recycler Carton Fauteuil - Taille réelle. Americana® Home Decor crayeuse Options de finition. Our water-based waxes are available in three shades, and have a creamy consistency unlike other solid waxes on the market.
Due to the porous nature of Americana® Decor™ Chalky Finish paints, our Crème Waxes literally fuse with the paint to provide a super strong layer of protection against daily use. Waxes offer a greater range of finishing options than varnishes, but be sure to use an Americana® Decor™ varnish for outdoor pieces. Easily applied with a brush or a soft, clean cloth Soap & water clean-up Can be buffed to a high-gloss sheen Dark waxes must be used over clear wax, to avoid staining the paint.
Clear wax available in 2 oz, 4 oz, 8 oz, and 16 oz sizes. Golden Brown wax available in 8 oz, and 16 oz sizes. Storage Trunk Makeover.
$10 Smartphone to digital microscope conversion! Roues Kayak. PVC Bow. Fan de Cheminée. Locomotives de soude. The soda locomotives were a kind of fireless locomotive that generated steam in a highly ingenious manner, rather similiar to that of the ammonia motors. Steam was raised in a boiler, expanded through cylinders in the usual way, and then condensed in a tank of caustic soda (sodium hydroxide) that surrounded the boiler. Dissolving water in caustic soda causes the liberation of heat, and this generated more steam from the boiler. Tissu de fibre optique - Blanc (40x75 cm) Fiber Optic Fabric - White (40x75 cm) Thermochromatic Pigment - Black (20g) Description: We've all seen toys and things that change color when you run them under warm water or heat them up in the sun.
Some of us were especially mesmerized and had to find out what made them do that. It turns out that this is a property called "thermochromism" and it can be implemented in a number of ways. This particular pigment is a Leuco dye type pigment which is made up of a mixture of Leuco dyes, weak acids and salts microencapsulated in polymer. Module GSM / GPRS - SM5100B. Conductive Glue And Conductive Thread: Make an LED Display and Fabric Circuit That Rolls Up. Make your own conductive fabrics, thread, glue, and tape, and use them to make potentiometers, resistors, switches, LED displays and circuits.
Using conductive glue and conductive thread you can make LED displays and circuits on any flexible fabric. They can be made flexible enough to roll up (see pic2). using the techniques presented here, you can replace solder in many instances and create circuits on almost any hard or flexible surface. This instructable is the result of some of my experiments with making conductive materials and components. Make conductive ink - search Instructables. Indiana Jones MKVII sac - moitié la taille! I love Indiana Jones's famous bag, but the last thing I need is yet another mid-size satchel. I've been looking unsuccessfully for another small purse to replace one that's falling apart... so I decided to combine the two! Comment faire de la pâte à modeler conducteur. Ink Painting - Make to Learn Contest. DIY Flexible Circuits imprimés. Get some thin sheets of polyimide which have copper on one or both sides. Polyimide is a yellow polymer with a high melting temperature and is sometimes called Kapton.
A common type of copper-coated polyimide is DuPont "Pyralux" material. Pyralux sheets come in many different varieties of polyimide thickness, copper thickness and adhesive thickness (the "adhesive" is between the copper and polyimide holding everything together.) Copper thickness is given in oz per square foot, while adhesive and Kapton thickness is given in mil (1 mil =0.001 inch). Double-Faced Tape : source for gaffers tape-glow tape-duct tape-duracell procell batteries and more, Goodbuyguys-source for gaffers tape-glow tape-duct tape-duracell procell batteries and more.
Elemental Scientific, LLC. Assurez-colle conductrice et colle un circuit. This is an instructable on the best conductive glue I have been able to make that uses easy to obtain materials, glues well to most materials, is quite flexible and has a low resistance. Unfortunately for me, it uses a rubber or plastic mixture that I do not know the chemical composition of, so I cannot patent it. There are many kinds of conductive epoxies, glues, and rubbers available. Unfortunately, they are for the most part quite expensive.
So, for more than four years, I have been trying every possible combination of likely elements, compounds, and solvents that I could get my hands on, in order to make my own truly affordable conductive glue. Comment construire votre robot vibrant modulaire. LED bleue transilluminator.
Modélisme. Voile. Colle-Mastic et divers. Technologie - Comment faire Instructables. 56 46 25 146 3259 15315 24453 91.3K 3126 4190 108 121.2K 311.3K 652.0K 25686 22703 21912K 26583 291.1K 918.7K 18664 4199 28862 261.2K 411.9K 151.0K 642.2K 501.2K 1073.1K 5314 19823K 11796 761.7K 12800 34689 16503 591.5K 9882 19584 7429 381.3K 31894 381.1K 312.0K 19588 7532 311.3K 26829 21727 271.0K 191.8K 14624 33876 601.1K 321.3K 884.1K 401.7K 20962.
Expériences-aimants. Maison. Tables de découpe. Consoles. Fatras. Évier en béton. Chambre secrète 123D aiguilles à tricoter. Photo. Impression 3D. Piles-Batteries. Vélo.