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(Today Just Eric on the go) Hacknotes 090408
 
(Today Just Eric on the go) Hacknotes 090408
  
=Everything Coming Together=
+
=Everthing Coming Together=
 
 
My compass-vibro-anklet is so close to being done, I can taste it.  The armature is really sweet, with 8 motors and three external pouches for the batteries and Arduino.  The code is working.  With [[Hack_Notes_CVA_090408#Today.27s_findings|Skory's insight]] that our Arduino problems are related to using 2 batteries (something wrong with voltage regulation from 7+V), my anklet may in fact be totally working.  But some detail on how I got here:
 
 
 
==Blister==
 
 
 
I wore the anklet this morning for an hour, and I think the arduino halted at some point and left just one motor on for an extended period of time.  I got a very ugly, very large, but not at all painful blister right under the motor (I have a photo, but you don't want to see it) - which shows that we need to write code to make motors time out after awhile, because I don't think it's unreasonable to expect people to sit at desks and actually have the same motor be the correct motor for hours on end... Also, for Armature #3, I intend to use something like a layer of left to protect the skin from the motors.
 
  
 +
My compass-vibro-anklet is so close to being done, I can taste it.  The armature is really sweet, with 8 motors and three exernal pouches for the batteries and Arduino.  The code is working.  With [[Hack_Notes_CVA_090408#Today.27s_findings|Skory's insight]] that our Arduino problems are related to using 2 batteries (something wrong with voltage regulation from 7+V), my anklet may in fact be totally working.  But some detail on how I got here:
  
 
==This Weeks Work==
 
==This Weeks Work==
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I have commented out the code for Skory's magnetometer, of course - and also note that due to messing up the wiring, I had to make the order of the motors with respect to the shift register bits look pretty strange.  All that matters is when you pulse 1-8 in order the motors go in order.
 
I have commented out the code for Skory's magnetometer, of course - and also note that due to messing up the wiring, I had to make the order of the motors with respect to the shift register bits look pretty strange.  All that matters is when you pulse 1-8 in order the motors go in order.
  
==Working!!!==
+
==Blister==
 
 
Thanks to Skory's tip about the battery, and one final discovery, I now have a fully operational battle station, er I mean compass vibro-anklet.  Final discovery?  You need to power on the device with the compass chip in the proper orientation, i.e. face up and level.  If you power up in any other orientation, the device seems to be confused and just outputs random/distorted angles. 
 
 
 
Also, it seems to work consistently better in the "upright" orientation rather than upside down, so I'm simply mounting my entire armature upside down to get the compass chip to be right-side up.
 
 
 
I won't be able to wear the CVA this weekend (not willing to risk it at airport security), but I'm very much looking forward to wearing it continuously once I get back.
 
  
 +
I wore the anklet this morning for an hour, and I think the arduino halted at some point and left just one motor on for an extended period of time.  I got a very ugly, very large, but not at all painful blister right under the motor (I have a photo, but you don't want to see it) - which shows that we need to write code to make motors time out after awhile, because I don't think it's unreasonable to expect people to sit at desks and actually have the same motor be the correct motor for hours on end...
  
 
[[Category:Sensebridge]]
 
[[Category:Sensebridge]]

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