A Papier Mâché Electronic Enclosure « Eclectic Technical Experiences A few years ago my wife attended a Papier Mâché (paper pulp) art class. She taught the rest of us one technique called layering. In this technique you glue small pieces of paper inside or outside a mold in layers. You can glue a few layers at a time, let it dry, and add more layers. I did not have a plastic box with the correct dimensions to serve as a mold, so I decided to start with a skeleton box made out of thin corrugated cardboard. You can see the cardboard that I used for the skeleton on the right, along with some pieces of magazine paper that I used later in the layering process. In the picture on the right you can see the box and lid almost ready. That’s it. Here it is with the lid open. I didn’t find a good way to make the lid latch closed. Like this: Like Loading...
I2C Tutorial Using the I2C Bus Judging from my emails, it is quite clear that the I2C bus can be very confusing for the newcomer. I have lots of examples on using the I2C bus on the website, but many of these are using high level controllers and do not show the detail of what is actually happening on the bus. This short article therefore tries to de-mystify the I2C bus, I hope it doesn't have the opposite effect! The physical I2C bus This is just two wires, called SCL and SDA. The value of the resistors is not critical. Masters and Slaves The devices on the I2C bus are either masters or slaves. The I2C Physical Protocol When the master (your controller) wishes to talk to a slave (our CMPS03 for example) it begins by issuing a start sequence on the I2C bus. Data is transferred in sequences of 8 bits. How fast? I2C Device Addressing All I2C addresses are either 7 bits or 10 bits. The placement of the 7 bit address in the upper 7 bits of the byte is a source of confusion for the newcomer. Easy isn't it?
Silicon farmers SMT Soldering–It’s easier than you think! is our new Manga Comic that shows you step by step tips and techniques for learning to solder SMT parts . We’d love to get your feedback on the comic. We are in the process of working out the kinks so we can get translations of the comic into everyone's hands – we’ll keep you posted. For everyone that learns better with hands on experience we are offering our SMT 2D6 SMT Learn to Solder Kit in the store. SX PC and USB Logic Analyzer, Signal Generator, I2C, SPI, Async Protocol Decoder and Analyzer The USBee SX Digital Test Pod combines state of the art design with easy to use PC software to give you a complete digital test bench in a small and affordable package. Connecting to your PC, the USBee SX Digital Test Pod uses the power and speed of the USB 2.0 High-Speed bus to capture and control information from your own hardware designs. The USBee SX runs the following applications: The USBee SX is a complete digital test bench in one compact and easy to use pod. Combined with the free, yet powerful, Windows® 7, Vista, XP and 2000 software the USBee SX is a deep buffer depth Logic Analyzer and Signal Generator. Included in the Logic Analyzer module is a High Speed Asynchronous Serial bus decoder, SPI Bus decoder and I2C bus decoder. USBee SX takes advantage of already existing PC resources. Included with the USBee SX is the Signal Generator software that lets you create digital waveforms using the USBee SX pod. The Signal Generator software provides the following functions:
Fritzing OLS - alternative Java client Welcome to the project page of Logic Sniffer Java client. This page will provide some documentation and, of course, download links. Table of contents Introduction The alternative OLS-client provides a software client for the Open Bench Logic Sniffer logic analyser hardware. The Open Bench Logic Sniffer is the result of a collaboration between Gadget Factory and Dangerous Prototypes. News August 12th, 2013, OLS version 0.9.7 released. What other people say about... I had to rock some intense LAing today, and I just wanted to say that the latest version is fantastic! It keeps getting better and better! Features The alternative Java client provides the following features: Cross platform: the client runs on Mac OSX (32/64-bit), Windows (32/64 bit), Linux (32/64 bit) and Solaris (32 bit); Simple installation: no longer fiddling with the serial libraries (RXTX) in order to get the client up and running. Documentation All documentation is maintained on the wiki. Download Changelog Screenshots Development
DIY: how to create an invisible cable holder in less than 5 minutes | My rambling weblog of things and…stuff In my work desk, I have these loose cables coming from below that allow me to connect some of my gadgets to their corresponding chargers: One is for connecting my Nokia N80, the other is to connect the Bluetooth headset Nokia BH-210. The grey USB cable is connected to a 4-port Hub where I connect some other gadgets such as my printer, a mouse and the iPod dock that you can also see on the image. The problem with these loose cables is that they are loose…obvious, right? What I really wanted was a way to maintain them easily accessible (and obviously not loose), yet not visible, in order to garantee a pleasant view of my desk. I’m pleased to report that I achieved my goal, and the best of all is that I did it using simple objects that you can find anywhere and under 5 minutes. What you’ll need: A hole punchSome duct tape An old business or credit card that you won’t be using anymore (plastic ones work better)A scissor or other cutting uttensil Got everything?
Notes: Arduino-based logic analyser by follower - labradoc.com The process of getting an Arduino-based logic analyser working Download the current source from the repo: wget --no-check-certificate --content-disposition Should result in a file named something like gillham-logic_analyzer-c923ff1.zip. Then: unzip gillham-logic_analyzer-c923ff1.zip Install the OLS GUI application. Because we know this is serial (a.k.a.
LED Video Wall | DorkbotPDX Several months ago, I was approached by the Portland band Starfucker (STRFKR) to build them an LED video wall for their upcoming tour. It needed to be large, bright, and durable, but also lightweight, portable, and easy to set up and tear down. They wanted to be able to plug in an iPod or iPad and play videos that are synced up along with their click track so everything goes along perfectly with the music. I enlisted the help of Alex Norman to take care of the software side of the project, and got to work trying to figure this thing out. It seemed like it could be made with mostly off-the-shelf components, and indeed that turned out to be the case. It didn't take long to find Adafruit's Digital Addressable RGB LED w/ PWM waterproof flexi strip, which looked like a good, simple solution for the pixels and drivers, since they all come together on a flex circuit and all you have to do is provide power and "SPI-like" data and clock signals. And here it is full-size:
MEMS Gyro-Accel | Gyroscope | Accelerometer | Processing - MPU-9250 The MPU-9x50™ family of parts are the world’s first 9-axis MotionTracking devices designed for battery operated, high performance consumer electronics products. The 9-axis product family incorporates the same market proven MotionFusion™ and run-time calibration firmware that is supported in InvenSense’s market leading MPU-6000 and MPU-3000 family of products. This firmware has shipped in millions of units and has been very well market validated. 9-Axis MotionTracking has become a key function in many consumer electronics devices including smartphones, tablets, gaming consoles, and smart-TVs. The MPU-9x50 devices combine a 3-axis gyroscope, 3-axis accelerometer and 3-axis compass in the same chip together with an onboard Digital Motion Processor™ (DMP™) capable of processing the complex 9-axis MotionFusion algorithms. The MPU-9x50 family is comprised of parts listed in the table below. MPU-9X50 System Diagram
9 Degrees of Freedom - MPU-9150 Breakout Description: The 9DOF MPU-9150 is the world’s first 9-axis MotionTracking MEMS device designed for the low power, low cost, and high performance requirements of consumer electronics equipment including smartphones, tablets and wearable sensors. And guess what? You get to play with it. This breakout board makes it easy to prototype with the InvenSense MPU-9150 by breaking out all the pins you need to standard 0.1" spaced headers. The board also provides I2C pullup resistors and a solder jumper to switch the I2C address of the device. The MPU-9150 is a System in Package (SiP) that combines two chips: the MPU-6050, which contains a 3-axis gyroscope, and 3-axis accelerometer. Features: Documents:
La fotoincisione dei circuiti stampati Torna alla Home Page Recapiti Introduzione Questo documento ha lo scopo di mettere a disposizione di chi lo desideri le tecniche necessarie ad ottenere con pochi mezzi la realizzazione di circuiti stampati mediante tecniche di fotoincisione. La qualità dei risultati ottenibili, pur non essendo ovviamente uguale a quella industriale, è davvero molto buona. In questa pagina descriveremo alcuni principi di base della fotoincisione, e descriveremo poi praticamente come realizzare un PCB. Per quanto riguarda il metodo di esposizione della basetta, diciamo subito che non è necessario disporre di un bromografo, di solito abbastanza costoso, a meno ovviamente di autocostruirlo; in questo articolo verrà infatti proposto l'utilizzo di una lampadina solare come sorgente luminosa, che, rispetto a un bromografo, necessita però di alcuni accorgimenti supplementari. Riconoscimenti Principi di base Realizzazione della maschera di layout b) Stampa inkjet su acetato (per inkjet) Esposizione Sviluppo