Arduino Maker Projects. Réalisations - Alim pour lasers 001. Electronique > Réalisations > Alimentations > Alimentation pour diode laser 001 Dernière mise à jour : 12/08/2012 Présentation Ce genre d'alimentation est fortement recommandé sinon indispensable pour une utilisation sans risque d'une diode laser.
Une diode laser peut être utilisée sans régulation d'alimentation, à l'aide de deux ou trois piles de 1,5 V montées en série (c'est ce qui se fait dans les pointeurs bon marché ou dans certains porte clés) mais au détriment de la durée de vie du composant. Le schéma qui suit décrit un régulateur permettant de limiter précisement le courant parcourant une diode laser. Avertissements Un laser est dangeureux ! Schéma Pas vraiment complexe, il s'appuye sur un régulateur de tension intégré ajustable très courant, le LM317, ce dernier étant monté en générateur de courant constant.
Vous pouvez appliquer à l'entrée du régulateur LM317 (sur le connecteur J1) toute tension comprise entre 6 V et 12 V. I (dans diode) = 1,25 / R où R = R1 + RV1. Qucs project: download. Yorick - A Dummy Head Recording Microphone. Yorick - A Dummy Head Recording MicrophoneRod Elliott (ESP) Please Note: PCBs are available for the latest revision of this project.
Click the image for details, or select P93 or P88. Introduction. The Big-E Stereo Parabolic Microphone. (C) G.
Forrest Cook January 1, 2005 Introduction This device is a stereo amplifier for a high sensitivity stereo parabolic microphone. It can be used for listening to distant sounds. Typical parabolic microphones are monophonic, this unit has a stereo audio path that helps produce more realistic sounding audio. Ensure long lifetimes from electrolytic capacitors: A case study in LED light bulbs. Op amps… G=1 stable & decompensated. RapidRepair. 20Hz to 200Hz Variable High-Pass Filter. Posted Jan 12, 2012 at 9:39 am The circuit was designed to create a high-pass filter that can be variably change to work with frequency range from 20 Hz to 200 Hz.
High Pass Filter – an electronic circuit that allows the passage of high frequencies while opposing any unwanted low frequency components TL072 – a low noise JFET input operational amplifier with features such as common-mode input voltage range, high slew rate, operation without latch up, compensated internal frequency, high input impedance at the JFET input stage, low noise, low total harmonic distortion, protected from output short circuit, low input bias and offset currents, wide common-mode and differential voltage ranges, and low power consumption. Adjustable high-pass filter - Google Search. The squarewave parade. Electronic Circuits and Design Information. iFixit: The free repair manual. How-To: Design your own iPod super dock (Part 1) Look for resident hackers Will O'Brien and Eliot Phillips (plus many other crazy projects) April 22-23 at the Maker Faire in San Mateo, CA!
This one goes out to everyone that has an iPod or two laying about and an itchy soldering iron and thinks that the standard USB or Firewire dock just isn't quite good enough. The tiny thirty pin dock connector on the bottom of later model iPods contains quite a few connections and we want to take advantage of all of them: audio, video, serial, USB and Firewire. Today, we're bringing you part one of a How-To series on designing and building your own iPod super dock. In this first part we'll be shopping for parts and preparing to design the super dock. The idea of building a dock with every connection available has been around for a while. The most challenging part to acquire is the actual iPod dock connector. For the rest of the connectors, we visited Mouser electronics. Next we made a simple schematic layout. Comments. Projetos Archive - Eletronica.org. Construa seu Próprio Monitor Cardíaco, um ECG simples Este projeto vai ensinar você a criar o seu próprio dispositivo de monitoramento cardíaco, um ECG/EKG (eletrocardiógrafo) simples.
''' - SHOP.BAR''''s Emporium - Electronics''' Electronic circuits & mini projects. See Other projects in : Mini Projects • Radios • Simple Circuits And: House fm transmitter, wireless video sender Posted by admin - June 29, 2012 at 9:47 pm This the fm wireless transmitter circuit, the truth is one kind microphone that developed to be used without a cable from the microphone to the amplifier.
ZRLC. An impedance meter with auto-BIAS compensation I've been working on this project from over a year, and I think will be impossible for anyone to understand the amount of work behind what can seem "another window" of VA.
As matter of fact, the program is ready and I'm very proud of it, nevertheless I'm strongly convinced that nobody could really appreciate my efforts. HACKOLOG - Amazing Hacks and Mods. As you may know, FM transmitters are created using several pieces.
Of course, technology has kept on following a general downsizing tendency. This is what makes the development of a project like this very important. Creating a transmitter using just 2 pieces is quite a breakthrough. Electronics. Pcb. Embedded Geeks. Design, Analysis & Circuit Theory. Electronic Circuits - Free Electronic Circuits. Open Collector. COOL SCHEMATICS. S-DIY links. Electronics Projects & Circuits. If you've already worked through a few projects from my books; Electronics Projects For Dummies or Complete Electronics Self Teaching Guide and caught the electronics bug you might want to try a few projects from other sources.
To help you out heres a list of some interesting electronics projects that we've found around the Web . These projects look interesting and are well documented but we haven't had a chance to build them all, so results may vary! We've also included links to other Web sites that contain projects you can browse through. Controle de potência de uso geral (ART405) Use a transistor and an ammeter to measure inductance - 2012-04-05 07. Concise electronics for geeks. Copyright (C) 2010 by Michal Zalewski <lcamtuf@coredump.cx> There are quite a few primers on electronics on the Internet; sadly, almost all of the top hits resort to gross oversimplifications (e.g., hydraulic analogies), or convenient omission, when covering subtle but incredibly important topics such as the real-world behavior of semiconductors.
There are some exceptions, to be sure - but they tend to suffer from another malady: regressions into mundane, academic rigor, complete with differential equations and complex number algebra in transient analysis - a trait that is highly unlikely to be accessible, or even useful, to hobbyists. Optoelectronic Devices. LED driving and controlling methods. I decided to write this quick tutorial for two reasons: First because there are many people who would like to know more about driving and controlling LED lights, and second because i was provided an excellent LED driver chip from Farnell for test, and i wanted to put it under the microscope. So i will place this chip against some other LED drivers to see how good it is. The chip that I'm talking about is the A6210 from Allegro Microsystems. It is a Buck-Regulating LED Driver able to drive up to 3A load with constant current, with switching frequencies up to 2 MHz and supply voltage from 9 to 46 volts.
It has an optional PWM input to control the brightness of the LED. The sense voltage is down to 0.18 volts for higher efficiency. Electric Circuits. Operational Amplifiers. 200 Transistor Circuits. This will clear-up a lot of mysteries of the solar panel. Many solar panels produce 16v - 18v when lightly loaded, while other 12v solar panels will not charge a 12v battery. Some panels say "nominal voltage," some do not give any value other than 6v or 12v, and some specify the wrong voltage. You can't work with vague specifications. You need to know accurate details to charge a battery from a solar panel. There are 3 things you have to know before buying a panel or connecting a panel to a battery. 1. 1. 2. You can clearly see the 11 cells of this panel and it produces 6.6v when lightly loaded.
This panel claims to be 18v, but it clearly only produces 14.4v. 3. 4 Band Resistor Color Codes. Analog, Embedded Processing, Semiconductor Company, Texas Instruments. Electronic theory index. Applications. Audio Electronics. Electronic Components. Finding parts. Magnetic Field. Inductor Designer / Calculator.
Audio. Power sources, regulators, chargers. Arduino and microcontropllers etc.