Septambic Chording Keyer

Have you ever wished you could graft a text input device directly onto your arm? Well, this is about as close as it gets without surgery... Inspired by Greg Priest-Dorman's Chorder wiki, I'm building a handheld chorded keyboard based on Spaceman Spiff's Chording Keyboard Experiment (SpiffChorder) with some earlier influence from Steve Mann's septambic keyer. Photos and designs published in this section are licensed under the terms of the GPL (3.0), same as the SpiffChorder project itself (since they could be considered derivative works).

Monocular Headmount Display

As I begin work on a wearable display, I'll flesh out this section. Here are some interesting links for components I'm considering:

Single-Board Wearable Computer

Right now I just go everywhere with an Asus Eee PC netbook running Debian GNU/Linux, but intend to transition soon to a low-power single-board computer. Some links for reference:

Portable Power Supply and Charger

Portable power will also be critical:

-  ⇤ ← Revision 17 as of 2012-05-28 03:36:02 → 
  Size: 3448
  Editor: fungi
  Comment:
+   ← Revision 110 as of 2012-06-17 23:54:01 → ⇥
  Size: 2528
  Editor: fungi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-## page was renamed from DieMenschMaschine
+{{attachment:8BitFungi.png||align="right"}}
 Line 3:
-[[http://en.wikipedia.org/wiki/Kraftwerk|Kraftwerk]], [[http://en.wikipedia.org/wiki/The_Man-Machine|The Man-Machine]], 1978
+[[http://en.wikipedia.org/wiki/Kraftwerk|Kraftwerk]], [[http://en.wikipedia.org/wiki/The_Man-Machine|The Man-Machine]] (1978)
 Line 6:
+<<TableOfContents>>
-Line 7:
+Line 8:
-= Septabmic Chording Keyers =
Inspired by Greg Priest-Dorman's [[http://chorder.cs.vassar.edu/|Chorder]] wiki, I'm building a handheld [[https://en.wikipedia.org/wiki/Chorded_keyboard|chorded keyboard]] based on [[http://symlink.dk/projects/spiffchorder/|Spaceman Spiff's Chording Keyboard Experiment (SpiffChorder)]] with some earlier influence from Steve Mann's [[http://wearcam.org/septambic/|septambic keyer]]. Photos and designs published in this section are licensed under the terms of the [[http://www.gnu.org/copyleft/gpl.html|GPL (3.0)]], same as the !SpiffChorder project itself (since they could be considered derivative work).
+= Septambic Chording Keyer =
Have you ever wished you could graft a text input device directly onto your arm? Well, this is about as close as it gets without surgery... Inspired by Greg Priest-Dorman's [[http://chorder.cs.vassar.edu/|Chorder]] wiki, I'm building a handheld [[https://en.wikipedia.org/wiki/Chorded_keyboard|chorded keyboard]] based on [[http://symlink.dk/projects/spiffchorder/|Spaceman Spiff's Chording Keyboard Experiment (SpiffChorder)]] with some earlier influence from Steve Mann's [[http://wearcam.org/septambic/|septambic keyer]]. Photos and designs published in this section are licensed under the terms of the [[http://www.gnu.org/copyleft/gpl.html|GPL (3.0)]], same as the !SpiffChorder project itself (since they could be considered derivative works).
-Line 10:
+Line 11:
-[[attachment:SpiffChorderBreadboard.png|{{attachment:SpiffChorderBreadboard.png|SpiffChorder breadboard}}]]
I started on a solderless breadboard, shown here, but those really aren't suited for higher-frequency prototyping and so I was getting stray USB device resets at random (particularly if I inadvertently brushed the ground line while not grounding myself first). I used the components in GPD's DigiKey bill of materials, going with the 8x pull-up resistor SIP array since I was only testing with 7 keys. I also chose poorly on a preformed bank of 3 yellow LEDs which were somewhat larger than I intended and the leads weren't quite a multiple of 0.1" standard breadboard pitch. I used Lady Ada's excellent [[foo|AVR breadboard labels]] to more easily keep track of what I was connecting.
+ * [[/KeyerChords|A text-terminal-friendly "modified NASA" chordset reference chart...]]
 * [[/KeyerProgramming|Install the SpiffChorder firmware onto an ATmega168 microcontroller...]]
 * [[/KeyerBreadboard|Prototype a SpiffChorder on a solderless breadboard...]]
 * [[/KeyerPerfboard|Build a SpiffChorder on perfboard...]]
 * [[/KeyerPCB|SpiffChorder on a printed circuit board...]]
 * [[/KeyerHandset|Make your own SpiffChorder handset...]]
-Line 13:
+Line 18:
-[[attachment:SpiffChorderPerfboardCircuit690x825.png|{{attachment:SpiffChorderPerfboardCircuit251x300.png|SpiffChorder perfboard circuit}}]]
In an effort no to limit my capabilities with the keyer's software, I wanted to make sure this could double as a development board. To that end, I implemented all optional components of the !SpiffChorder circuit. I tried to make it as compact as possible while still working on single-sided pad-per-hole perfboard.

[[attachment:SpiffChorderPerfboardFront690x825.png|{{attachment:SpiffChorderPerfboardFront251x300.png|SpiffChorder perfboard front}}]]
[[attachment:SpiffChorderPerfboardBack690x825.png|{{attachment:SpiffChorderPerfboardBack251x300.png|SpiffChorder perfboard back}}]]

= Monocular Headmount Displays =
+= Monocular Headmount Display =
-Line 25:
+Line 24:
-= Single-Board Wearable Computers =
+= Single-Board Wearable Computer =
-Line 31:
+Line 30:
-= Portable Power Supplies and Chargers =
+= Portable Power Supply and Charger =