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Multirotors
  by Stoyan Zhekov




                     1
Drones?




          2
SkyNet?




          3
Ethernet of things (EOT)?




                            4
How it starts?


                 5
GY-521




         6
3 AXIS !

           7
3 axis = Flying !




                    8
Let’s dream!

               9
Parrot AR.Drone




                  10
Apple Store!




               11
Keep it real!

                12
Product
    vs
Platform

           13
Platform

• Cheap, Available
• Easy maintain - parts, cheap and available
• Easy changes
• Scalable
• Community


                                               14
FPV   vs   Acro


                  15
A bit of theory
    Aerodynamics




                   16
Lifting!




           17
Torque (momentum) ?




                      18
Torque!




          19
20
Helicopters
  single rotor




                 21
Helicopter ?!




                22
MULTIrotors


              23
Tricopter




            24
Quadcopter




             25
Hexacopter




             26
Octocopter




             27
This is madness!!




                    28
Common parts


               29
Propellers
  CW vs CCW




              30
LiPo
Lithium Polymer battery



                          31
Brushless motors




                   32
ESC
Electronic speed control



                           33
Flight Controller
    Axis, Sensors, DOF




                         34
Flight Controller


• 3 axis - gyro only
• 6 axis - gyro + accelerometers
• 10 DOF - 3 x gyro, 3 x acc, 3 x compas, baro




                                                 35
Flight Controller




                    36
BEC
Battery eliminator circuit



                             37
MultiWii

           38
Radio
Transmitter (Tx) / Receiver (Rx)




                                   39
Radio

• Freq - 2.4Ghz
• Protocols - FlySky, DSMX (Sp), DEVO (Wk)
• Channels - > 4
• Modes - Mode 2
• RTF , BNF


                                             40
Turnigy 9XR




              41
Turnigy 9XR




              42
er9x

       43
Size matters!
   Small is good?!




                     44
45
46
47
48
Useful Sites

• http://www.banggood.com/
• http://www.aliexpress.com/
• http://www.hobbyking.com/
• http://www.rcgroups.com/

                               49
kick start - SYMA X1




                       50
kick start (2) - V9x9




                        51
52
Let’s fly!

            53

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Multirotors