Cory's Blog – July 2008 Archive (2)

Lithium Polymer Batteries and Chargers mini-primer

Lithium Polymer batteries are an attractive power source for electric flight due to their high energy density. The combination of lithium polymer batteries and brushless motors now rivals glow power in terms of power and duration.

The main difficulty when using lithium polymer batteries is choosing what batteries and charger to use. Batteries are specified in terms of voltage, capacity, and discharge rating.

Voltage is generally listed as 1S - 6S. The S number refers to… Continue

Added by Cory on July 23, 2008 at 11:04am — 7 Comments

Arduino GPS shield with SD card logging.

I saw this yesterday over on the Make blog. Adafruit has come out with a new Arduino shield which looks excellent for UAV usage. The shield has support for several gps modules, and can log data to an SD card.

Even with the GPS and SD card, there are still 5 digital and 5 analog IO open.

Here are the details(text below lifted from

GPS shield for Arduino kit with data-logging capability. After building this easy… Continue

Added by Cory on July 1, 2008 at 7:37am — 1 Comment

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