Tag Archives: Arduino

Microcontrollers

AVR HV Rescue Shield PCBs are in, kits available soon.

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Big news – the AVR HV Rescue Shield PCBs arrived yesterday!  I’m currently testing them and will post information about kits for sale as soon as I verify that everything is working properly.

This is actually the second spin of the PCB but the first to bear the ‘Rescue Shield’ name.  The first spin was a one-off prototype to check a couple things out, mostly related to the 5V to 12V step up converter.  That design allowed me to fix a couple bugs before doing a production run with the improved design, show below.

So far all I can say is that the step up converter works perfectly.  (Yipee!)

More details to come!

AVR HV Rescue Shield PCB - Top

AVR HV Rescue Shield PCB - Bottom

Electronics, Events, Microcontrollers

100th post! Tony’s Wifi Radio Sketchup Model, Dorkbot Tonight

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100 Posts!

This is my 100th post to the blog.

When I started blogging in July of last year I wasn’t sure what I would post about or where all of this would go.  Eight months later, the blog has exceeded my expectations in many (and many unexpected) ways.  The major driving force behind this blog has always been my desire to share my projects and my passion for electronics with the world, in addition to (hopefully) inspiring some other people to do cool things with electronics as well.

My favorite post?  Definitely the Arduino-based AVR High Voltage Programmer.  I never expected such a simple circuit to help so many people.  There has been so much ongoing interest in this project that I am putting together an Arduino shield kit based on the original design.  The kit features a slick double-sided PCB and an integrated 5 to 12V step up converter so you don’t need an external 12V supply to use the programmer.  More details very soon!

Tony’s Wifi Radio Sketchup Model

Wifi Radio Enclosure - Google Sketchup Model

Tony created this awesome Google Sketchup model of an enclosure for my Wifi Radio project.  After I made a very crude first draft, Tony took my design and turned it into something that is sort of modern, sort of retro.  Perfect!

Dorkbot Tonight

In other news, there is a Dorkbot SF meeting tonight at Parisoma at 7:30PM.  Arrive early to get a seat!  Details at dorkbot-sf.

Books and Resources

Getting Started with Arduino

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Getting Started with Arduino

Getting Started with Arduino, by Massimo Banzi, is the latest physical computing book from O’Reilly and the first dedicated to the wildly popular Arduino microcontoller platform and integrated development environment.

Massimo’s short text is an excellent introduction to the hardware and software sides of the Arduino and contains a walk-through for uploading a sketch to the board, basic programming techniques, interfacing with common sensors, troubleshooting techniques, and some interesting notes about tinkering, physical computing and interaction design.  The book is based on a collection of notes that were formerly available within the Arduino wiki.  The notes were removed when the book was released, but fortunately I saved a copy and you can download them here.

The book is available from amazon.com or comes as a companion to the Arduino starter kit available from the Maker Shed.

Microcontrollers

AVR HV Programmer Shield in the Works!

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hvfuse_shield3_brd
AVR HV Programmer Shield PCB Layout

What’s this???

In response to the continued demand for a PCB version of my Arduino-based AVR High Voltage Programmer, I just released a first cut to BatchPCB and should have a prototype within 3-4 weeks.

This design is an improvement upon the original HV programmer shield in the following areas:

  • Onboard 12V boost converter eliminates the need for an external 12V power supply
  • Support for two of the most common families of AVR microcontrollers, the ATmega48/88/168 and ATtiny2313
  • Separate Ready and Burn indicators
  • Protection resistors on every single data, control, and supply line to the target AVR, meaning that your Arduino and AVR should survive any mishaps during programming, including inserting the AVR backwards or off by 1 pin.

I hope to have kits for sale in early February.  Sorry for the delay in getting these made, but I wanted to make the best possible shield I could!