My dream for the Chordata project is to enable non-invasive finger tracking for the existing motion platform. A previous discussion exists pertaining to a 16-bone model but has likely been abandoned. I figured this is not only feasible as is, but could be done with much less components, at over 140 US dollars in reduction of costs, per pair of gloves.
There are two different boards in this solution, the Opisthenar (back of hand), and the Manipulator (the fingertips).
The idea is to mount these components to a glove with minimal reduction of dexterity.
The Manipulator boards have a total of 8 components onboard to reduce size: C1-C5, a pull up resistor, and a LSM9DS1 IMU. These "manipulators" would be connected through JST-SH-04 (qwiik) twisted pair, straight-through (not crossover) cables, and cannot function without the Opisthenar main board.
All EEPROM and other components are placed on the Opisthenar board for consolidation of power and data lanes. This hand based board has six connectors for Index, Middle, Ring, Pinkie, Right Thumb and Left Thumbs, allowing the same motherboard to be used for either hand.
A single 3.3v LDO (low dropout regulator) is used for power correction (making this system functional up to 5.5 volt input). I've also added a schottky rectifier diode to prevent reverse polarity. Both of these components can be bypassed if deemed unnecessary by the end user. Also included is a single IMU to replace the hand's K-Ceptor unit.
The current schematics are available for download on EasyEDA, links below.
Both schematics are "panelized" by default. A minimal quantity order of 5 through JLCPCB will produce 10 total Opisthenar (1x2x5) and 200 total Manipulator boards (5x8x5).
Opisthenar - Hand motherboard
Manipulator - Finger tracking modules
Github homepage, Currently Empty
I have ordered a set of PCBs and will try to keep this feed alive with progress once I start building. I plan on making three total Mocap suits using this solution + the base Chordata platform.
All constructive criticism is welcome - this is my first project of the sort, and I'm sure I've bodged something here.