Haoyi Chen
← All projects

EMBEDDED HW/SW

Wireless Motor Analyzer

A wireless motor analysis instrument on the TI CC2640, taken from reference design to a working prototype.

Key contributions

  • Defined hardware specifications to meet measurement-accuracy and reliability requirements under harsh operating conditions
  • Drew the mixed-signal schematic in Cadence OrCAD following TI’s official reference design, including an electrical isolation circuit protecting the MCU from motor high-frequency noise and ground-loop interference
  • Completed PCB layout to RF design guidelines, achieving precise 50 Ω impedance matching and antenna performance optimization for signal integrity
  • Performed component selection and BOM validation against application-note parameters, balancing industrial reliability (RoHS) against cost
  • Developed embedded firmware in TI Code Composer Studio using TI’s packaged IP cores and protocol stack libraries
System block diagram: the motor supply feeds a DC-DC converter and LDOs; the INA226 reads the shunt resistor and connects through the ISO1540 isolator to the CC2640 MCU, which reaches the phone over Bluetooth
System block diagram: power rails, isolation boundary and the I2C and BLE signal paths.
Analyzer board on a desk, wired to a bench supply and a load resistor, with a phone showing the app's voltage, current and power readings
System validation setup: analyzer board, DC supply, load resistor and the Android app over BLE. The app reads 12.04 V against 12.01 V on the supply.
Title page of the Motor Power Consumption Analyzer Technical ReportView PDF →
Technical report, 31 pages, in English.
Schematic sheet 3: CC2640R2F microcontroller, RF matching network and debug connectorsView PDF →
Schematic, 3 sheets: power input and sensing, measurement and isolation, MCU and RF.