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====== Flow v2 deck ======
The Flow deck gives the Crazyflie 2.0 the ability to understand when it's moving in any direction. The VL53L1x ToF sensor measures the distance to the ground with high precision and the PMW3901 optical flow sensor measures movements of the ground.

{{:projects:crazyflie2:expansionboards:flow-v2_render_front.png?nolink&400|}}
{{:projects:crazyflie2:expansionboards:flow-v2_render_back.png?nolink&400|}}

This creates a flying 3D robot that can be pre-programmed to fly distances in any direction or act as an aid for beginners as it creates a very stable flying platform.

===== Specification =====
  * [[http://www.st.com/en/imaging-and-photonics-solutions/vl53l1x.html|VL53L1x]] ToF sensor to measure distance up to 4 meters
  * {{ :projects:crazyflie2:expansionboards:pot0189-pmw3901mb-txqt-ds-r1.00-200317_20170331160807_public.pdf |PMW3901MB datasheet old lens}},  {{ :projects:crazyflie2:expansionboards:pot0189-pmw3901mb-txqt-ds-r1.40-280119.pdf |PMW3901MB datasheet new lens}}
  * 1-wire memory for automatic expansion deck detection
  * Designed for mounting under the Crazyflie 2.0
  * Mechanical specification:
      * Weight: 1.6g
      * Size (WxHxD): 21x28x4mm

===== Schematic =====
{{ :projects:crazyflie2:expansionboards:flow-deck-v2_rev-a_schematic.pdf |Flow deck v2 schematic Rev A}}

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