Electronique
Get flash to fully experience Pearltrees
Induction
Building robots instead of sleeping
NEW Check out this video of the AVRcam on my line-following robot EyeBo-3, tracking the line visually at 30 frames/second! The line is purposefully not straight, to see how it would do with zig-zags and splits, as are normal for the Chibots advanced line-following contest. AVRcam Capabilities The AVRcam is a small, real-time image processing engine capable of tracking colorful objects.
Arduino I2C Sniffer » johngineer
I’m working on an I2C project, but I don’t have a sampling oscilloscope and I need to see what the heck is going on, so I put together this quick and dirty I2C sniffer sketch. You connect two digital pins on the Arduino to the I2C bus lines SDA and SCL, and Arduino ground to I2C ground. The digital pins on the Arduino must be on PORTD, which are pins 0 through 7. It’s probably a good idea to avoid the serial lines, which means you should use any two pins between 2 and 7. It captures the data (within a certain time window) and then it sends CSV-formatted output to the serial port. You can then take this data and plot it to get an idea of what’s going on on your I2C bus.Logisim is an educational tool for designing and simulating digital logic circuits. With its simple toolbar interface and simulation of circuits as you build them, it is simple enough to facilitate learning the most basic concepts related to logic circuits. With the capacity to build larger circuits from smaller subcircuits, and to draw bundles of wires with a single mouse drag, Logisim can be used (and is used) to design and simulate entire CPUs for educational purposes. Logisim is used by students at colleges and universities around the world in many types of classes, ranging from a brief unit on logic in general-education computer science surveys, to computer organization courses, to full-semester courses on computer architecture. It runs on any machine supporting Java 5 or later; special versions are released for MacOS X and Windows.
Logisim
USB servo controller | Member Robot Tutorials
Standard RC servos need a power supply of between 4.8 and 6 volts. They also have a Pulse Width Modulation (PWM) signal input which controls the angle of the servo. This device supplies up to 6 such servos with a 5V supply and the PWM signal to control the servo. The combined load of your servos should not exceed 3 amps. Check your servo's documentation for pin out and max current draw. It takes an external power supply of anywhere between 7 and 30 Volts to power the servos.
LED Analogue Clock - DIY Electronic Projects
Videos of the clock can be found on my youtube channel below, some slight alterations have been made sinse the videos were posted, changes to the patterns, flicker reduced, bugs fixed ect. Version 3 is still being worked on, it will need a circuit modification, 1 LDR and 1 Resistor added and connected to A0 on the 16F877, This is a auto dimming feature for darker rooms. Also has 'fade out' added to some patterns. The LEDs are wired into a large matrix formation 12 columns x 15 rows. The rows are connected via current limiting resistors directly to the PIC16F877 I/O Ports C & D.
Free from practical constraints on board size, pin counts, layers and output types, DesignSpark PCB circuit design software can be used for schematic capture, PCB design, layout and generating manufacturing files. Multi-page schematic designs are supported and gerber (extended) file outputs allow the designer to choose who will manufacture the board. DesignSpark PCB supports the importing of Eagle CAD design files, circuit diagrams and libraries (See the Eagle import tutorial for further information). A comprehensive standard parts library is supplied, which can be amended, copied and added to as required and sophisticated part creation wizards make it easy to Design new parts from scratch or by amending standard symbols and footprints. Bill of materials (BOMs) reports can also be generated at any time; these give RS Components order numbers where appropriate.
PCB | DesignSpark
Clock
GPS
microcontrolleurs
Audio
Make A TRON Bag - How to use EL (Electro Luminescent) Wire
Tote your Thinkpad and port your Apple in style with our custom TRON-inspired laptop bag tutorial. With a little soldering and sewing skills you can have your own light up satchel, sure to impress geeky friends. So grab your sewing needle and soldering iron and follow along Stuff you'll need!
Measurement of peak level is useful while testing an amplifier or a similar device. It is handy while testing a logic circuit, as it can pick up a high transient pulse (or show that there is none) and measure an output that is swinging strongly in both directions. Mobile Bug, Mobile signal detector This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one and a-half metres.
Electronics Project - News
ShmooCon was, once again, a fantastic experience this year. One of many highlights of this year's event for me was hacking on some radio devices with Travis Goodspeed in the hotel bar for hours on end. This included playing with the IM-Me that he brought. As soon as I got home I ordered one. I found mine for $15.99 and free shipping on eBay. Since then I've written custom firmware to turn my IM-Me into a pocket spectrum analyzer, shown here displaying activity of a frequency hopping system at a grocery store.
a $16 pocket spectrum analyzer
EL Wire, also known as Electroluminescent wire, is a stiff wire core coated with phosphor and then covered with a protective PVC sheath. When an AC signal is applied to it, it glows an aqua (blue green) color. Sometimes its covered with a colored plastic shell to make it appear another color. It looks a little like thin neon. Very bendable, it keeps its shape and you can curl it around your finger. Its an easy way to add some glow to a project, not as bright as LEDs but uses a lot less power!
How to use EL (Electro Luminescent) Wire
Solenoid control
It wasn’t long ago that my wife and I had our first child and if you have any kids you probably know the excitement of playing, teaching, changing diapers, staying up late at night and all those great memories. For us, my daughter's “Papa” lived on the other side of the country so he didn’t get to see her often; although, he came out whenever he could. To help keep Lucy, my daughter, and Papa connected on a more regular basis he got us both a webcam. This was amazing.
Cammy Webcam Control for the Living Room - Pan Tilt
Generateur de fonctions
Communication
Fun
Laser
Since 1946, Electronic Surplus has been serving the needs of hobbyists, inventors, HAM radio operators, engineers, and technicians in Cleveland, Ohio and around the world. We specialize in hard to find electronic parts from audio ICs and devices, to transformers and relays. Our inventory is made up of obsolete and active items, all at surplus prices.
Home
PCB diy
Benvenuto in .: robotitaly.NET :. - la community italiana sulla robotica. Benvenuti in questa comunità ! Se questa è la tua prima visita, per poter aprire discussioni e messaggi o per poter usufruire dei nostri servizi, Dovresti registrarti (leggi in basso).
.: robotitaly.NET :. - la community italiana sulla robotica - Powered by vBulletin
Minty Water Valve Controller
For the water valve, I picked the Orbit yard watering valve . It's widely available in home improvement stores, and it is cheap. It has two pins: applying +24v opens the valve, and -24v closes the valve. It uses a latch solenoid, drawing power only when you open or close it. This makes it very power efficient. To use a single li-poly battery to drive the valve, I needed a voltage booster to raise the 3.6v provided by the battery to 24v momentarily before connecting to the valve solenoid.Seway style
Controle via Internet
Aide calcul
Blog -forum
Head mounted display
Serveur web
robots
mesure/capteurs
leds
arduino
radio
Tutoriel
Interface utilisateur
BeagleBoard
Prototypage
Alimentation
Merci pour vos encouragements ! by pearljames Aug 11
Voilà un pearltree se révélant très util.
Vous abordez tous les sujets de l'électronique que rencontrent les amateurs. De plus vos perles sont toutes à fait pertinantes. Continuez comme ça ! by thomasau Aug 11