Gootee Links Page: Electronics, Electronic, Astronomy, Brewing, Information, CNC, Shipping, Surplus, Parts, Dealers, Manufacturers, Antique Radios, Linux, Unix, C, Schematic, HTML tutorial, Computer, Hamfest, Analog, Digital, Search Engines, Application N Link to Gootee's Homepages: The Complete Index. i.e. Links to ALL of my webpages. I converted my Favorites/Bookmarks file into a webpage, thinking someone else might find it useful. Some of the links are old, and may not work anymore. I haven't tried them all, lately. If you have a useful link that I can include, or, to report a dead link, please email me, at tomg@fullnet.com SEARCHABLE ARCHIVE of ALL MESSAGE-TRAFFIC, from ALL UseNet "NEWSGROUPS" discussion groups, since about 1980!!! CLICK HERE TO HEAR: Three-Part Invention No. 12 in A major; by Bach, Johann Sebastian (1685-1750, Germany) Electronics; Theory, Schematics, etc Electronics: Test Equipment, Manuals, Dealers, Sales, Ads, Classifieds, Auctions Tektronix Electronics: Manufacturers, Appnotes Computers and Programming CNC Machines (and Tooling/supplies) Robotics and Control Systems (and some CNC) Classic Audio Antique Radios and Vacuum Tubes Searching the Web, and HTML Webpage Publishing Tutorials and Tools Astronomy Classical Music Books
Examples of Gliffy Diagrams Gliffy’s friendly editor, vast symbol libraries, and handy templates make it easy to communicate your thoughts and plans visually. You’re just minutes away from all the diagrams you need: Flow Charts SWOT Analysis UML Charts Venn Diagrams Org Charts Network Diagrams Business Process Wireframes Site Maps Technical Drawings Free Online Course Materials Xenon Flasher This discussion covers 3 different Xenon flashing circuits from disposable cameras. From them, you will learn circuit tricks that have NEVER been shown in any theory book. The first circuit covers 6 BUILDING BLOCKS. You will need an old "disposable Flash Camera" plus two extra parts to carry out the modifications. The first circuit comes from a Fuji camera: You are going to like this project. THE BUILDING BLOCKS This project has 6 separate building blocks: 1. WARNING This project generates 350V DC and stores the voltage in a large electrolytic. 1. The feedback winding is connected between the 220R resistor and the base of the transistor. 2. 3. 4. 5. 6. MORE ON THE "CIRCUIT" Unfortunately this project cannot be left in a "ready" state as the circuit consumes about 250 - 300mA just to keep the electrolytic charged and a single cell will last only a few hours. DIFFERENT CIRCUITS Unfortunately not all flash units are the same.
BEAM Heads 101 First let's examine how the HLO operates, without using the IN signal, behaving like a classic CMOS astable oscillator. The oscillator consists of 2 inverters with the input of inverter A serving as a summing node for several signals. As can be seen, a 5M potentiometer (R1) is connected from the output of inverter A back to it's own input. Basic 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. {*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. You will also need some electronic parts available from Radio Shack or a good junk box. <b><b>Black </b></b> </b>*}
ATX Bench Power Supply — Russell Jones Here is a very useful bench power supply that I made from an old ATX supply. I will not re-iterate what has been done before (look at ATX -> Lab Bench Power Supply Conversion on Instructables for a great discussion). I made this while at college in their well furnished machine shop. The pictures are self-explanatory. I spent about $3.00 on the rocker switch and military cover. Power Resistors. Nice aluminum panel that I made on a very old metal punch tool. Reverse. Overall shot. Non-standard voltages can be obtained by mixing the different voltage taps. The fan was originally on the inside of the case. Nice P-Touch labels. I kept the Molex connectors so I can use it to suck away solder fumes while I work. Be Sociable, Share!
ATX to Lab Bench Power Supply Conversion First, a bit of background on a typical ATX power supply: Computer power supplies are Switch Mode Power Supplies (SMPS), which use high-frequency switching circuit elements to provide a high-quality output voltage, with good energy efficiency. One side effect of this technology is the minimum load requirement that each power supply has. Also, modern power supplies do not simply have an OFF/ON switch, they have what is known as a "soft" power switch. To protect our circuit from accidental (and careless!) Update: While the diagrams show fuses on all voltage rails and no fuse on the ground line, when I actually built my power supply, I was young and foolish and only put a fuse on the ground wire.
Compact fluorescent lamp Menu Introduction Compact fluorescent lamps have some benefits in comparison with classic light bulbs. Fluorescent lamps are available usually in these color temperatures: Warm white (2700K) Cool white (4000K) Daylight (6000K) Most often we meet with "warm white", which is close to classic bulb and which is most pleasant to people. Electrical construction Princip of function we explain on a LUXAR 11W lamp. Lamp start R6, C2 and DIAC mades first pulse to base of transistor Q2 and cause his opening. Normal operation When the gas is ionisated in a pipe, C3 will be practically shorted and thanks to this frequency goes down and changer is now drived only by C6 and changer generates much lower voltage but enough to keep the light on. Failures Common failure is broken capacitor C3. it is possible mainly at cheap lamps, where are used cheaper components for lower voltage. Repair of electronics Repair of electronics usually means change of capacitor C3 if he is brobek. Mechanical construction Reviewing