V0.3

Here some pictures and information about V0.3 of Open-BLDC

Features

 * Sensors
 * Voltage sensing on all three phases
 * Current sensing on two phases
 * Supply rail voltage sensing
 * Comparator for hardware based BEMF zero crossing detection
 * Interfaces
 * UART (TTL level RS232 interface)
 * CAN (Controller Area Network)
 * I2C (Inter-Integrated Circuit)
 * Three board stack allowing easy changes and different revisions of hardware

Changes from V0.2

 * Added virtual star point resistor network
 * Added comparator for hardware based BEMF zero crossing detection
 * Split out gate driver circuitry to a separate board
 * Changed the huge D2Pak mosfets to an array of tiny power33 ones
 * Added big rail stabilization capacitors
 * Added quadrature encoder connector
 * The logic board now expects all input signals to be in the 0V-5V range (for compatibility to logic boards that can only do 5V
 * Updated and refined inter board connector pinout
 * Added additional i2c interface from logic board to power driver and powerstage
 * Added i2c eeprom on the power driver board for storing powerstage calibration information