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--- skateboard [2022/09/23 02:09] – created jhagstrand
+++ skateboard [2023/01/12 11:44] (current) – removed jhagstrand
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-====== Skateboard ======
-==== todo ====
-  Battery specs for nano
-  Boot nano in embedded mode
-  Run python program on boot
-  Python webserver
-  https://docs.python.org/3/library/http.server.html
-  https://github.com/howCodeORG/Simple-Python-Web-Server/blob/master/serv.py
-  Python Ajax server
-  https://stackoverflow.com/questions/336866/how-to-implement-a-minimal-server-for-ajax-in-python
-  How to get IP?  Polling?
-  hostname -i
-  start webserver.py and ajaxserver.py simultaneously
-==== State of the Art ====
-As of June 2020, a youtube search reveals only one project involving a robotic or autonomous skateboard.
-* https://www.youtube.com/watch?v=LEmKBrcBGcM
-This manipulates weight distribution to "pump" a skateboard in a small half-pipe. No steering.
-==== Physics ====
-  * steer - tilt the board right or left to twist the trucks
-  * lean - the faster the speed, the more the rider must lean into the turn
-==== Intelligence ====
-  * run a course - steer around traffic cones, accelerate to maximum possible speed
-==== Vehicle design ====
-  * Jetson Nano mounted on skateboard
-  * one electric hub motor on the skateboard for forward and backward acceleration
-  * two linear servos distributing a weight side-to-side for steering
-  * one downward-facing camera drone connected to the Jetson via wifi
-  * batteries for the drone, the hub motor, the linear servos, and the Jetson
-  * the Jetson plots the course and steers the skateboard and drone around the course
-  * a web interface to the Jetson allows humans to stop and start the vehicle
-  * a smart-phone wifi hotspot, the Jetson and drone connect to the hotspot
-Step 1. RC, forward, stop, right, left
-Drone
-  *  Step 1. Aerial photo. Identify cones, obstacles.
-  *  Step 2. Plot course.
-Options
-  *  Drone can fly over the course.
-  *  Drone only sends video and follows skateboard.
-  *  System can work with camera mounted on the skateboard.  Works better airborne.
-electric skateboard that drives itself with weight-shifter for steering
-  *   and a drone with downward camera for vision
-  *    drone launches off the skateboard and follows the board
-  *    video from the drone transmits to computer and steering instructions then transmit to skateboard
-  *    software on the computer draws the scene, identifies cones and obstacles, draws lines, calculates angles
-step 1, use an off the rack jetson nano vehicle
-  *    but instead of a camera on the vehicle, use one from a drone
-  *    establish comm between vehicle and drone
-  *    build indoor courses with cones
-Buy
-  * USB web cam
-  * Battery for Jetson
-  * Drone
-  * Skateboard
-  Photos of Cones and vehicle
-  Detect with camera and Jetson
-    Use drone camera handheld
-  Camera feed from drone to Jetson
-  Identify the course
-  Reference each frame
-  Draw angles among cones
-  Plot course
-  Jetson control drone
-  Fly the course
-  Keep overhead
-  Jetson control skateboard
-  Run the course
-  Web interface to Jetson
-  What is WiFi range?
-  (Phone controlled drones use wifi)
-  Cheap drones send camera feed to phone
-  How can we get that feed to the Jetson?
-  https://youtu.be/7ukDKVHnac4
-  Transistor