Documented gyro stabilizer for binoculars.

[physical.git] / optics / gyro for binoculars / index.org

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+#+TITLE: Gyroscope stabilizer for binoculars
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+#+MACRO: imglnk @@html:<br/><a href="$1"><img style="width:100%; max-width:500px;" src="$2"></a>@@
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD:   footer {background-color: #111 !important;}
+#+HTML_HEAD:   pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+  COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+  DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+  - Svjatoslav Agejenko
+  - Homepage: https://svjatoslav.eu
+  - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+  - [[../../index.html][Other physical projects in this repository]]
+  - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Problem with powerful binoculars is that they are almost unusable
+without tripod. High zoom factor also amplifies hand shakes.
+
+Tripod is not convenient to carry around. Here is an attempt to design
+portable gyro stabilizer that has camera tripod interface. Therefore
+cameras and binoculars can be mounted.
+
+
+[[file:make,%202.png]]
+
+
+Old computer hard disk platters are used as rotating discs. They are
+attached to following disk mount:
+
+[[file:disk%20mount%20body.png]]
+
+Download:
+- [[file:disk%20mount.FCStd][Editable FreeCAD project]]
+- [[file:disk%20mount%20body.stl][Printable STL file]]
+
+Disk platters are fixed to disk mount using glued tightly fitting top
+ring:
+
+[[file:disk%20mount%20top%20ring.png]]
+
+Download:
+- [[file:disk%20mount%20top%20ring.stl][Printable STL file]]
+
+Discs are rotated by electric motor. Motor is cooled by electric fan.
+Motor and fan are powered by 12V that is generated by 3 voltage upstep
+converters running in parallel.
+
+[[file:schematic.png]]
+
+Body:
+[[file:make,%201.png]]
+
+FreeCAD model of the main body:
+
+[[file:main%20body,%201.png]]
+
+[[file:main%20body,%202.png]]
+
+Download:
+- [[file:body.FCStd][Editable FreeCAD file]]
+- [[file:main%20body.stl][Printable STL file]]
+
+Rotating discs are covered and protected by top cover:
+
+[[file:top%20cover.png]]
+
+Bottom part of the main body has cover:
+
+[[file:bottom%20cover.png]]
+
+Download:
+- [[file:bottom%20cover.stl][Printable STL file]]
+
+Camera/binoculars can be mounted on dedicated holder that is screwed
+on top of the cover:
+
+[[file:binocular%20mount.png]]
+
+Download:
+- [[file:binocular%20mount.stl][Printable STL file]]
+
+
+Result:
+
+[[file:make,%203.png]]
+
+[[file:make,%204.png]]
+
+* Conclusion
+Around half of the stabilizing effect already comes from extra weight
+that is added to binoculars by device itself. Rotating platters
+contribute also about as much. I had only 2 platters. I'm
+contemplating finding more weight to rotate, or even try with old
+CD/DVD disks.
+
+Unfortunately symmetry is not perfect and small high frequency
+vibration is added because of that.