Nordintown Blog

Rubbish musings, projects and hackerings from Nordin

Quadcopter Drone Army - Update #3

Apr 072015

I am keen to complete this project, and so I am just about to purchase the following:

  • 15x N-channel MOSFET Transistor, 4.2 A, 20 V, 3-Pin Micro3 (IRLML2502PBF )
  • 2x Hot Swap Controller Bidirectional i2c level converter (LTC4301LCMS8)
  • 5x CD74AC04M, CMOS Hex Inverter 24mA 1.5 → 5.5 V 14-Pin SOIC
  • 10x HC-49 Crystal 25MHz, ±20ppm, 2-Pin

The FETS are to fix one of the quads that has blown it's cheap versions (a known problem, sadly [1])

The I2C level converter is to convert the wiimote logic level to something I can experiment with on an Ardunio Nano v3.

The Hex inverter is used around the crystal along with caps to stabilise the clock signal for the Pixart camera

The 25Mhz clock provides the clock needed to drive the pixart IR camera's onboard IC.

These are mostly SMD components, so I get to gain more experience over dealing with these guys.  I have used variboard with SMD in the past so theres is that, but I might take the opportunity to make a batch of useful 8pin/14pin/16pin smd breakout boards for the space [2].

[1] http://www.rcgroups.com/forums/showthread.php?t=2090915&page=98#post29124381 
[2] http://hackaday.com/2010/04/29/surface-mount-breakout-boards/ 

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