Electronic Goldmine - Electronic Components, Parts, Test Equipment, Kits, Goldmine. 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. Some of the links are by other members of my family. - Tom Gootee [Original Page-Creation Date: 1/11/2001] 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 Astronomy Books.
Volume I - DC : All About Circuits. 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. No kits are available for any of this discussion. You can get an old camera from a friend or a photographic shop and the parts from an electronics store. 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. DIFFERENT CIRCUITS Unfortunately not all flash units are the same. USING THE PROJECT The project can be used as a "dummy camera" to scare intruders. Electric Wire Art. Своими руками, Из проволоки, 2066, Солдаты из проволоки., basik.ru. Electro Bikes. - Alan Parekh’s Electronic Projects. Evil Mad Science Shop. Compact fluorescent lamp. Menu Introduction Compact fluorescent lamps have some benefits in comparison with classic light bulbs. It is lower power consumption (to 80%) and much longer lifetime (5 to 15 times). Disadvantages are longer starts mainly at more expensive types, impossibility to use darker and price.
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 Repair of electronics Mechanical construction Reviewing Links Bigluz 20W Luxtek 8W. Electronic Circuits - Free Electronic Circuits. 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. The rest was trash or free. 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. In order to function properly, the power supply needs at least a very small electrical load connected to it. In other words, ATX power supplies will only work if you have something connected to it. 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. Adafruit Industries, Unique & fun DIY electronics and kits. Pagermotors.com: Products. 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. Because of the signal inversion, this is DC negative feedback, which tends to drive the input voltage of inverter A towards its 1/2V+ threshold. The output of inverter A is also directly connected to the input of inverter B.