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Home automation with Raspberry PI - Star Trek LCARS GUI. Why does my 8 GB microSD card now only show a size of16 MB? MATT WARNOCK GUITAR. This is a guest post by Steve Nixon.


He writes for the website Photo Credit: Adrian Whelan Photo Credit: Adrian Whelan What is a good jazz practice routine? One of the challenges that aspiring jazz musicians face when practicing is the sheer amount of potential material to choose from. There never is a shortage of things to learn and review.

Unfortunately, as a result of the overabundance of jazz practice resources, many students practice very inefficiently. They jump from topic to topic in a very unfocused way. The goal of this article is to “trim the fat,” so to speak, and help you organize a good and consistent personal practice routine. We’ll discuss the six steps of a good jazz practice routine. Warm Up (5% of Your Practice Practice Routine) Before you begin to practice, it’s always a good idea to warm up your muscles and joints. Playing an instrument requires strength, flexibility, and endurance. Technical Exercises (10 to 15% of Your Practice Time)

Exemples projets #arduino vidéos/tutos. Cs0rfe added: Guide to Arduino and AVR Communications. If you spend any time playing with Arduinos, ATtinys or looking at AVR spec sheets, you soon encounter a bewildering smörgåsbord of acronyms for various communication protocols.

Cs0rfe added: Guide to Arduino and AVR Communications

With examples such as I2C, LIN, SPI, TWI, USI, etc., it can get pretty confusing. If you don’t believe me, just take a look communications column for Digikey’s listing for the ATmega series chips. Confused yet? What do these terms mean? How do you choose the chip that meets your needs? Communication Protocols The SPI (Serial Peripheral Interface) is the protocol used by the ICSP (in-circuit serial programming) facility transmitted over the ubiquitous 6-pin (2×3 pin) header used to program AVR chips. The Serial Peripheral Interface Bus or SPI (pronounced as either ess-pee-eye, spy or simply S.P.I) bus is a synchronous serial data link standard, named by Motorola, that operates in full duplex mode. This protocol is known as both I2C (Inter-Integrated Circuit) and as TWI (two wire interface).

And many more. Two Wire. Cs0rfe added: ATTiny USI I2C Introduction - A powerful, fast, and convenient communication interface for your ATTiny projects! I2C, it's a standard that's been around for around 20 years and has found uses in nearly every corner of the electronics universe.

Cs0rfe added: ATTiny USI I2C Introduction - A powerful, fast, and convenient communication interface for your ATTiny projects!

It's an incredibly useful technology for us microcontroller hobbyists but can seem daunting for new users. This tutorial will solve that problem, first by reviewing what I2C is and how it works, then by going in-depth on how to implement I2C in Atmel's ATTiny USI (Universal Serial Interface) hardware. I2C is commonly used in GPIO expanders, EEPROM/Flash memory chips, temperature sensors, real-time clocks, LED drivers, and tons of other components. If you spend much time looking for new, cool parts you'll probably wind up with several I2C parts. Fortunately it is a protocol that is available on most microcontrollers, though it is a bit more complex than others. I2C Tools of Interest: Before you dig too deep into I2C communications, you'll want to have some things on hand that will make your learning experience easier. Adding wireless to the Raspberry Pi. 11 cheap gifts guaranteed to impress science geeks.

Science comes up with a lot of awesome stuff, and you don't need a Ph.D, a secret lab, or government funding to get your hands on some of the coolest discoveries.

11 cheap gifts guaranteed to impress science geeks

We've got a list of 11 mostly affordable gifts that are guaranteed to blow your mind, whether or not you're a science geek. Click on any image to see it enlarged. 1. Aerogel Also known as frozen smoke, Aerogel is the world's lowest density solid, clocking in at 96% air. Aerogel isn't just neat, it's useful.

Price: $35 2. Inside these sealed glass balls live shrimp, algae, and bacteria, all swimming around in filtered seawater. Bookmarks. Computer and Internet Tools and Resources. Basic first aid procedures for common household injuries - by Rebecca Adele Scarlett. Rebecca Adele Scarlett's image for: "Basic first Aid Procedures for Common Household Injuries" Caption: Location: Image by: It is important to be well-informed and well-practiced in first aid techniques, as one never knows when an emergency will occur.

Basic first aid procedures for common household injuries - by Rebecca Adele Scarlett

Mild External Bleeding Small cuts and scrapes will happen often in the home. Poisoning When small children live in the home, cleaning products must be properly stored so they do not drink them. Burns Burns are a common household accident. Electrocution Electrical cords and outlets are tempting toys for young children.