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

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