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Welcome to Dangerous Laboratories! - StumbleUpon

Welcome to Dangerous Laboratories! - StumbleUpon

Super Precision Gyroscope (without gimbals) - From The Super Precision Gyroscope has been designed and built to the highest precision from the very start, made from solid brass with a light-weight aluminium frame. Carefully chosen stainless-steel miniature ball bearings allow it to run smoothly and almost silently for an amazingly long time. The gyroscope comes with a number of attachments allowing numerous configurations to perform scientific, educational or simply mesmerising experiments. The gyroscope comes with 2 x 50 mm long stainless steel extension rods, 2 x ball ends, 1 x slotted end. Super FAST 12,000rpm Electric motor start The included electric motor spins the gyroscope effortless up to an impressive 12,000 revolutions per minute. Super SMOOTH computer balanced disk If a spinning object is unbalanced it will vibrate. Super SUSTAINED spin times of up to 25 minutes - NEW for Mar 2014 Click here for VIDEO CLIPS of the gyroscope in action Please be aware the new outer packaging does state “with gimbals”.

How I built an electricity producing Solar Panel Several years ago I bought some remote property in Arizona. I am an astronomer and wanted a place to practice my hobby far away from the sky-wrecking light pollution found near cities of any real size. In my attempt to escape city light pollution, I found a great piece of remote property. I built a wind turbine to provide some power on the remote property. Here is a video of the solar panel set up and in use on my remote, off-grid property. Let me state up front that I probably won't be able to help you out much if you decide to build your own solar panel(s). So what is a solar panel anyway? I started out the way I start every project, by Googling for information on home-built solar panels. After a while, I came to some conclusions: Once I came to the realization that I could use blemished and factory-second solar cells to build my panels, I finally got to work. <a href=' I bought a couple of bricks of 3 X 6 mono-crystalline solar cells.

Electrostatic Machines Electrostatic machines are electromechanical devices that produce "static electricity", or electricity at continuous (DC) high voltage. They were fundamental in the early studies about electricity, started in the XVII century, in the form of "friction machines", and their development culminated at the end of the XIX century with the development of powerful "influence machines". Today, some specialized uses for them continue to exist, but they are mostly seen as demonstration devices in physics laboratories, with much of their history forgotten. I started experimenting with these machines by 1973, building a first series of machines. Below are pictures and descriptions of my old machines, of machines that I built more recently, of machines built by others, pictures from old books and papers related to electrostatic machines and other high-voltage devices, and also some pictures from museums. Está também disponível uma seção em português. "Ignis ubique latet, naturam amplectitur omnem"

How To Solder - Soldering Tutorial Soldering is defined as "the joining of metals by a fusion of alloys which have relatively low melting points". In other words, you use a metal that has a low melting point to adhere the surfaces to be soldered together. Consider that soldering is more like gluing with molten metal, unlike welding where the base metals are actually melted and combined. This tutorial will cover the most common types of soldering required for electronics work. Soldering Equipment The Soldering Iron/Gun The first thing you will need is a soldering iron, which is the heat source used to melt solder. For hobbyist electronics use, a soldering iron is generally the tool of choice as its small tip and low heat capacity is suited for printed circuit board work (such as assembling kits). You should choose a soldering iron with a 3-pronged grounding plug. A variation of the basic gun or iron is the soldering station, where the soldering instrument is attached to a variable power supply. Solder Preparing To Solder

Electronics {*style:<b> Get a quick start by scrolling down to the introduction below this menu table. Basic Electronics - Course Table You are at the best, free online "Basic Electronics Course". Just read the brief blocks of text, view the videos, and check out some of the screened internet links. This is the easiest, fastest way to learn basic electronics. {*style:<b><b>Maybe you already know some basic electronics and want to test yourself to see exactly how much you do know. </b></b>*} {*style:<b>Explanation of AC and DC currents. </b>*} {*style:<b><b><b> P - I*V </b></b></b>*} {*style:<b>Watch the video . If you don't have a clue as to what electrical current and voltage are - read on. DC Theory Part 1 - DC Theory part 2 {*style:<b> </b>*} More book recommendations. There is another (and less expensive and practical) method of learning basic electronics. It is hands-on by doing simple projects. Get the MAKE: Electronics (Learn By Discovery) book below. {*style:<b><b>Combined resistance of <b><b>Red </b></b>

How to build My 50 Dollar Greenhouse & The Door Garden First off – you really can build this thing very cheaply, but to do so you have to recycle, freecycle, and scrounge. If you just go out and buy new everything it will probably cost over $200 – still not bad all in all.This Article is featured in Jan 2010 issue of Birds and Blooms Magazine!Want to find out if this thing works before you read all this? Read 6 months in the Greenhouse first.Want to see what happens when a few inches of wet snow accumulates on this? Collapse! My $50 Greenhouse Welcome Stumbleupon Gardeners! Materials list Construction Steps Hind Sight – What I would do differently The planning is over and construction on my hoop house greenhouse has begun. After some research I’ve decided to build the structure of the hoop house out of 20 ft. joints of three quarter inch PVC plumbing pipe. My hoop house green house is going to be 11 feet wide and 15 feet long, and will be about seven and a half feet tall in the center. If your Greenhouse is too Flat it will collapse! Thusly

Operational Amplifier Low Pass Filter Circuit Navigation:: Home >> Circuits and design >> this page -a summary of operational amplifier or op-amp active low pass filter circuitry Op-amp circuits include: • Operational amplifier circuits • Inverting op-amp • Non-inverting op-amp • Op-amp high pass filter • Op-amp low pass filter • Op-amp bandpass filter • Op-amp variable gain amplifier • Op-amp notch filter circuits • Operational amplifier multivibrator • Op-amp bistable • Op-amp comparator • Op-amp Schmitt trigger • Op-amp integrator • Op-amp differentiator Operational amplifiers lend themselves to being used for active filter circuits, including a low pass filter circuit. The simplest circuit low pass filter circuit using an operational amplifier simply places a capacitor across the feedback resistor. Xc = 1 / 2 pi f C where: Xc is the capacitive reactance in ohms pi is the greek letter and equal to 3.142 f is the frequency in Hertz C is the capacitance in Farads Operational amplifier circuits with high frequency roll off By Ian Poole

5 Ways to Give Yourself an Education That Kicks the Crap Out of the One You Got in School 5 Ways to Give Yourself an Education That Kicks the Crap Out of the One You Got in School One of the biggest reasons that people are denied the privilege of education is because they can’t afford it. However, today we live in a world where knowledge and information are at our finger tips like never before. Technology has leveled the playing field so that anybody with an interest and an internet connection can receive a world class education. Self Motivation is Not Optional Taking this kind of approach to educating yourself requires an extremely high degree of self motivation. 1. There are a handful of traditional education institutions that have started to embrace this trend. 2. In a recent feature, the CBS Sunday morning show said that there were approximately 50 million active blogs online. Want to learn how to get in shape? 3. 4. Do a quick search through the iTunes directory and you’ll find podcasts on a wide variety of subjects ranging from learning a language to online marketing.

Butterworth Low-Pass Filter DESIGN OF a 5th ORDER BUTTERWORTH LOW-PASS FILTER USING SALLEN & KEY CIRCUIT Background Theory: Filters are classified according to the functions that they are to perform, in terms of ranges of frequencies. We will be dealing with the low-pass filter, which has the property that low-frequency excitation signal components down to and including direct current, are transmitted, while high-frequency components, up to and including infinite ones are blocked. The range of low frequencies, which are passed, is called the pass band or the bandwidth of the filter. It extends from ω=0 to ω= ωc rad/sec (fc in Hz). The ideal response of a low-pass filter is shown above. It can be seen that a small error is allowable in the pass band, while the transition from the pass band to the stopband is not abrupt. The sharpness of the transition from stop band to pass band can be controlled to some degree during the design of a low-passfilter. The Butterworth Response Normalizing H0=1 and Then Example: For n=5 ).

EEG System | Electroencephalography ADC without ADC. Digital electronics and Analog electronics doesn't mix easily. A Microcontroller can't get analog values unless an Analog-to-Digital converter is used, however, you may find a little complicated the use of an ADC and it need lots of Input/Output ports. Some Microcontrollers, like the small 8-pin Microchip PIC 12F675, do have an ADC integrated, but it is expensier than a PIC without ADC. You can replace the resistor and use a thermistor to measure temperature (PTC or NTC), also a photoresistor can be used to measure light. How it works: Just connect the RC circuit directly to an I/O pin of the microcontroller. The PIC will measure the RC value of the I/O pin. Blastoise (Yellow Version) - Pokédex - The Ultimate Pokémon Center Home > Pokédex - Blastoise (Yellow Version) Basic Information Race Values ("Base Stats")8 View detailed stat info for Blastoise9 Pokédex Entries10 English Blastoise - Shellfish Pokémon Once it takes aim at its enemy, it blasts out water with even more force than a fire hose. French Tortank - Pokémon Carapace Une fois sa cible alignée, il projette des jets d'eau plus puissants qu'une lance à incendie. German Turtok - Panzer Nachdem dieses POKéMON einen Gegner anvisiert hat, attackiert es mit einem Hoch- druckwasserstrahl. Spanish Blastoise - Pokémon Marisco Cuando ataca a un enemigo, su descarga de agua es aún más potente que una manga de bombero Italian Blastoise - Pokémon Crostaceo Dopo aver preso la mira colpisce il nemico con getti d'acqua più potenti di un idrante. Japanese カメックス (KAMEKKUSU) - こうらポケモン (KouraPOKEMON) ポカンと あたまを たたかれるとき こうらに ひっこんで よける。 Evolutions (When Blastoise Evolves) Evolves from Wartortle at level 36. Locations (Where to Find or Catch Blastoise) Area Map Blastoise's Nest Moves Learned

Multichannel USB Analog Sensor with ATMega48 » Sometimes it’s tempting to re-invent the wheel to make a device function exactly the way you want. I am re-visiting the field of homemade electrophysiology equipment, and although I’ve already published a home made electocardiograph (ECG), I wish to revisit that project and make it much more elegant, while also planning for a pulse oximeter, an electroencephalograph (EEG), and an electrogastrogram (EGG). This project is divided into 3 major components: the low-noise microvoltage amplifier, a digital analog to digital converter with PC connectivity, and software to display and analyze the traces. My first challenge is to create that middle step, a device to read voltage (from 0-5V) and send this data to a computer. This project demonstrates a simple solution for the frustrating problem of sending data from a microcontroller to a PC with a USB connection. This is my final device. To the right is my working environment during the development of this project. class App: