Low Cost Arduino Based Auto-Stabilizing System

There are a lot of choices when it comes to picking a flight controller for your quadcopter.   If you are looking for a low cost way to auto-stabilize your quadcopter, this is the guide for you!

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Improving a Quadcopter’s Stability

Getting a quadcopter stable in the air isn’t trivial.  Stability of a quadcopter relies on the harmonious working of all of it’s parts.

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How-to Balance a Propeller

An unbalanced propeller produces excessive vibration.  This vibration travels through the entire airframe affecting the handling of the aircraft,  produces inaccurate readings by the sensors, and creates premature failure of motor bearings and parts.  A balanced propeller is paramount to a stable aircraft.  A balanced propeller produces less vibration and draws less current, which results in greater stability and extended flight times.  You should balance any propeller before installing it on your aircraft.  Balancing a propeller requires the use of a special tool, you guessed it a propeller balancer.  The propeller balancer that I use is the Top Flite Propeller balance.  It is essentially a shaft held by two magnets.  The magnets create a frictionless surface for the shaft to spin freely.  Read More…

Wireless Communication

XBee 1mW Wire Antenna Series 1 Modules

The ArduPilot Mega supports serial communication between the quadcopter and a computer.  This serial communication is used to upload the software, change tuning settings and to update the flight path.  The ideal wireless solution is XBee.  XBee modules are available at different frequencies and power outputs.  I am using the XBee 2.4GHz 1mW with the wire antenna modules.  The XBee 2.4GHz modules are more than sufficient for initial setup, tuning and short range use.  The XBee 2.4GHz modules operate at the same frequency as microwave ovens, WiFi routers and just about any other wireless consumer device.  These modules have to contend with radio interference and this why they are not ideal as a robust long range solution.  For applications requiring longer range and robust communication, using the XBee Pro modules is a better solution.   The XBee Pro’s operates at 900MHz the lower frequency allowing for a longer transmission range for the same power output as the 2.4GHz modules and are less susceptible to interference.  The XBee Pro’s are offered in different power outputs. The higher the power output, the longer the transmission range.