Parallax Inc, DC Motor Controller, 3 Phase, 7.4 → 11.1 V dc, 30 A

Electronic Speed Controllers (ESCs) are used on most R/C equipment for controlling the speed of a brushless DC motor. Compatible with a standard R/C receiver or any 3.3V or 5V microcontroller providing a standard PWM servomotor control signal.

Programmable with an ESC programming card
5V Battery Eliminator Circuit (BEC)
Three-phase electronic control of BLDC motor
Two (2S) or three (3S) cell Li Polymer battery input
Power requirements: 7.4 to 11.1Vdc
Continuous maximum current: 30A
Communication: R/C servo PWM
Dimensions: 48.26 x 25.4 x 7.62mm
Weight: 27g

The Propeller™ 1 microprocessor chip makes it easy to rapidly develop embedded applications. Its eight 32-bit processors (COGs) can operate simultaneously, either independently or cooperatively, sharing common resources through a central hub. The developer has full control over how and when each cog is employed; there is no compiler-driven or operating system-driven splitting of tasks among multiple cogs. A shared system clock keeps each cog on the same time reference, allowing for true deterministic timing and synchronization. Two programming languages are available: the easy-to-learn high-level Spin, and Propeller Assembly which can execute at up to 160 MIPS (20 MIPS per COG).