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project:corvidcompass [2026/01/20 22:34] – broken formatting/table fixing wikaraiproject:corvidcompass [2026/03/24 22:28] (current) – external edit A User Not Logged in
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 ====== The Corvid Compass: A Gaze-Based Sixth Sense ====== ====== The Corvid Compass: A Gaze-Based Sixth Sense ======
  
-This project is focused on being a discrete addition to your **glasses arm**, providing a subtle haptic "nudge" toward **Magnetic North** based on where you are gazing.+This project focuses on a discrete addition to your **glasses** or **hat**, providing a subtle haptic "nudge" toward **Magnetic North** based on where you are gazing.
  
-While optimized for eyewear, the "Corvid Compass" is a versatile charm. It can be tucked **behind the ear**, hidden under a **beard**, or even worn as a **pendant** +The "Corvid Compass" is a compact, versatile charm. It can also be tucked **behind the ear**, or even hidden under a **beard**! 
-  * Though as a pendant or cuff/pocket clip, it only shows North relative to your chest's orientation. +  * Though optimised for **headwear,** it can be clipped to a **jacket cuff** or worn as a **pendent** at the cost of head-tracking, your body instead must face North.
  
 Wherever it sits, it gives you that migratory "sixth sense" birds have. Wherever it sits, it gives you that migratory "sixth sense" birds have.
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 ===== Form Factor & Vertical Profile ===== ===== Form Factor & Vertical Profile =====
  
-W/ comparisons to AA/AAA batteries, SD card and two dollar coins.+w/ comparisons to AA/AAA batteries, SD card and 2x dollar coins.
  
 ^ Configuration ^ Length ^ Width ^ Height (Thickness) ^ Best For... ^ ^ Configuration ^ Length ^ Width ^ Height (Thickness) ^ Best For... ^
-| **The In-Line** | 60mm (AA) | 12mm (AA) | **~4mm** (Two loonies) | Flat glasses frames. | +| **The In-Line** | 60mm (AA) | 12mm (AA) | **~4mm** (Two loonies) | Flat glasses frames, hat. | 
-| **The Sandwich** | 25mm (SD card) | 18mm (AAA) | **~9mm** (AAA) | Tucking behind the ear. |+| **The Sandwich** | 25mm (SD card) | 18mm (AAA) | **~9mm** (AAA) | Tucking behind the ear, on body. |
  
 ===== The Shiny Bits (BOM) ===== ===== The Shiny Bits (BOM) =====
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 | **The Power** | MPD BK-885 | 12mm Coin Cell Retainer | $0.84 | For a CR1220 battery. | | **The Power** | MPD BK-885 | 12mm Coin Cell Retainer | $0.84 | For a CR1220 battery. |
  
-**Total Est. Cost per Unit: ~$11.07 - $22.65 CAD**+**Total Est. Cost per Unit: ~$11.07 - $22.98 CAD.**
  
-===== Flight Path Alternatives =====+[[https://www.digikey.ca/short/wr7p9npv|Digikey.ca Shopping Cart]] - [[https://www.digikey.com/short/wr7p9npv|[.com/USD]]]
  
-If you want to deviate from the standard flight path, here are your options:+===== Alternatives ===== 
 + 
 +Perhaps you desire shiny alternatives, or even better sensors you may reuse:
  
 ==== High-Altitude Options (Absolute Orientation) ==== ==== High-Altitude Options (Absolute Orientation) ====
 If you want the chip to do all the heavy math (Tilt-compensation, Calibration) for you: If you want the chip to do all the heavy math (Tilt-compensation, Calibration) for you:
-  * **The "Auto-Pilot" (BNO055):** ~**$45.00 CAD**. An Intelligent 9-DOF sensor. Outputs a stable "North" vector directly. No complex math required on your PIC!+  * **The "Auto-Pilot" (BNO055):** ~**$45.00 CAD**. An Intelligent 9-DOF sensor. Outputs a stable "North" vector directly. No complex math required!
  
 ==== Scavenger Options (Budget) ==== ==== Scavenger Options (Budget) ====
-If the Adafruit board is out of stock or you want to save some shiny coins:+If the Adafruit board is out of stock or you wish to save some shiny coins:
   * **The "Budget Bird" (QMC5883L):** ~**$4.50 CAD**. No accelerometer. Works only if held perfectly level.   * **The "Budget Bird" (QMC5883L):** ~**$4.50 CAD**. No accelerometer. Works only if held perfectly level.
   * **The "Middle Magpie" (Bare LSM303AGR):** ~**$6.50 CAD**. Buy just the chip and solder it to an LGA-12 adapter. Cheaper, but requires a steady talon and a hot air station.   * **The "Middle Magpie" (Bare LSM303AGR):** ~**$6.50 CAD**. Buy just the chip and solder it to an LGA-12 adapter. Cheaper, but requires a steady talon and a hot air station.
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 <code> <code>
-3.0V >---------+----------------+------------( MOTOR ) +3.0V >---------+------------------+--------------( MOTOR ) 
-               |                |                | +               |                  |                  | 
-            [ VIN ]             |            [ DRAIN ] +            [ VIN ]               |             +----------+ 
-         +-----------+          |          +----------+ +         +-----------+            |             |  DRAIN   | 
-         |  LSM303   |          |          |  2N7002  | +         |  LSM303   |            |             +----------+ 
-         |  SENSOR   |          +----------| GATE     | +         |  SENSOR   |            |             |  2N7002  | 
-         +-----------+          |          +----------+ +         +-----------+            +-------------|  GATE    | 
-         [SCL]   [SDA]          |          | SOURCE   | +         [SCL]   [SDA]            |             +----------+ 
-           |       |            |          +----------+ +           |       |              |             |  SOURCE  | 
-           |       |       [ VDD / PIN 1 ]       | +           |       |              |             +----------+ 
-           |       |      +----------------+     | +           |       |       [ VDD / PIN 1 ]           | 
-           +-------|------| SCL / PIN 6    |     | +           |       |      +----------------+         | 
-                   +------| SDA / PIN 5    |     | +           +-------|------| SCL / PIN 6    |         | 
-                          | PWM / PIN 2    |-----++                   +------| SDA / PIN 5    |         | 
 +                          | PWM / PIN 2    |---------+
                           +----------------+                           +----------------+
                             [ VSS / PIN 8 ]                             [ VSS / PIN 8 ]
-                                   | +                                  | 
- GND >----------------------------+--------------++ GND >----------------------------+------------------+
 </code> </code>
  
 ===== Bird Logic: The Firmware (C Code) ===== ===== Bird Logic: The Firmware (C Code) =====
  
-This code reads the compass and decides when to buzz. It includes basic **Tilt Compensation** so looking down doesn't confuse it.+This code reads the compass and decides when to buzz. It includes basic **Tilt Compensation** so looking down doesn't confuse it. **+/-10 deg** is considered North.
  
 <code c> <code c>
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 ===== KiCad Source ===== ===== KiCad Source =====
  
-KiCad is my open source electronic design CAD of choice.+[[https://www.kicad.org/|KiCad]] is my choice for Open Source Electronic Design CAD.
  
 Save this text as ''bird_sense.kicad_sch'' to open the schematic in KiCad. Save this text as ''bird_sense.kicad_sch'' to open the schematic in KiCad.
  
 +Note: **WIP** draft - non-functional currently.
 <code lisp> <code lisp>
 (kicad_sch (version 20260101) (generator eeschema) (kicad_sch (version 20260101) (generator eeschema)
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 ===== Closing Thoughts ===== ===== Closing Thoughts =====
  
-Building your own senses is the ultimate way to explore your territory. Just remember: measure twice, and keep your shiny bits polished!+Building your own senses is the ultimate way to explore your territory. Just remember: measure twice, solder once -- and keep your bits shiny with flux!
  
 Caw for now! Caw for now!
project/corvidcompass.1768977291.txt.gz · Last modified: (external edit)

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