[Cyborg] Heart Spark!

kristinneidlinger slimavocado at gmail.com
Sat Dec 18 22:53:44 UTC 2010


On Sat, Dec 18, 2010 at 11:34 AM, Matt Ho <matt.ho at gmail.com> wrote:
> Congrats!  This looks great!
> M
> On Dec 18, 2010, at 7:58 AM, Eric Boyd <mrericboyd at yahoo.com> wrote:
>> The Heart Spark pendant is finally ready!  I've been working on various
>> versions of this thing for three months, and before that on various
>> versions of the "pulse choker" for like a year.  I am happy to finally
>> have something to sell!  It's been a super huge amount of fun making it,
>> of course, and I've learned so much.  Thanks especially to Chung-Hay for
>> all the great hacking sessions at noisebridge, this project would never
>> have begun without you.  Thanks also to Leigh, Ewan and Liz for
>> providing various forms of assistance at hacklab.
>> http://sensebridge.net/projects/heart-spark/
>> Believe it or not the Heart Spark code is running up close to the limits
>> of the Arduino (ATMEGA168) - there are 1300 lines of code, not including
>> the libraries I use!  About half of them are the logging stuff, it's
>> quite complicated to get data into and out of the EEPROM in a way that
>> makes it useful later.  But a good chunk of the code is also having many
>> different ways to blink the LEDs, and there is a lot of code that deals
>> with keeping power usage low, since the pendant only has a coin cell
>> providing energy... though much more work needs to happen on that front.
>> I'm hoping to get a logging version for sale sometime late January.  I
>> do have logging working, but it's really rough in terms of user
>> interface so far, and also only "every heart beat" mode works right now
>> (the other "average heart beat each minute" would let you log data for
>> over a week before retrieving it, instead of needing to retrieve after 6
>> hours).
>> Anyway, I'm happy to answer any questions you might have.
>> Eric
>> p.s. Heart Spark made the makeblog!
>> http://blog.makezine.com/archive/2010/12/heart_spark_jewelry_beats_to_your_h.html
>> I'm kinda sad that they picked such a poor image from the wide selection
>> that is available, but on the other hand that music video is pretty
>> awesome, I am thinking that I should recreate it :-).
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