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  • Miscellaneous

    10-Nov-2013 5:05pm

    I had the opportunity last week to interview Murray Harms from Queensland Australia, and talk to him about his home made Iron Man Suit. He built it with his son for Halloween and as you can see below, it looks pretty amazing.

    Iron Man Suit
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    5-Feb-2011 12:24pm

    555 Contest

    The NE555 was designed in 1970 by Hans Camenzind and to this day remains an incredibly versatile chip.

    Jeri Ellsworth and Chris Gammell have put together a 555 design contest. There are 5 different categories and many prizes. including a Protostack ATMEGA168 Development Kit and USBASP Programmer.

    Entries are due March 1st and will be judged by Hans Camenzind and Forrest Mims. For more information, please go to http://www.555contest.com

    11-Feb-2010 9:12am

    Come join our fan page on facebook at http://www.facebook.com/Protostack


    28-Jan-2010 9:09am


    Keep up to date with all the latest news by following us at http://twitter.com/Protostack

    23-Jan-2010 9:08am

    I've been waiting for this book for quite some time, and was delighted when it finally arrived. Written by Jonathan Oxer and Hugh Blemings it describes how to build 14 different arduino projects, everything from a simple Appliance Remote Control to a Vehicle Telemetry System.

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    22-Jul-2009 8:48am

    Jonathan Oxer at Practical Arduino did a video review of our Atmega8 development kit earlier this week. I really like his idea about adding a dedicated area on the board for a power supply.

    24-Jun-2009 8:35am

    When you were a kid, you may have made a lemon battery for a school science project. These are very simple to make and involves inserting dissimilar metals into a lemon. Typical materials are copper staples and zinc plated nails. This combination usually gives you 0.7V and a few milliamps.


    The chemical reaction that happens in a lemon battery is called "Galvanic corrosion" and it also happens when 2 dissimilar metals touch each other. For galvanic corrosion to occur, the following factors must be present:
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    15-Mar-2009 8:08am

    Ever wanted to drive you etch-a-sketch from your computer, well one guy did and this is how he did it!


    The concept is pretty straight forward. The interface to the notebook is via a parallel port, there are a pair of stepper motors that turn the knobs on the etch-a-sketch, and an ATMEGA8 sits in the middle.

    One of the design challenges was that the stepper motors were rated at 24V and also drew a fair bit of current. A pair of uln2803 darlinton arrays were used with 2 channels used for each step. Each channel on the array can handle up to 500ma, so this provided adequate current for the motors.
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