Embedded Hardware Developer Intern

**Hardware / Embedded Systems Intern** **Duration:** * Total: 3 Months (Unpaid) * A certificate will be provided after internship completion. * Work Nature: In-person (Office) * Location: IIT Madras Campus, Guindy, Chennai. **Project Overview** * **Goal:** Evaluate photoplethysmography (PPG) for cuffless blood pressure (BP) tracking. * **Target:** Early preeclampsia risk detection in pregnant women. * **Current Focus:** Sensor stability, clean signal acquisition, and edge-case testing in healthy adults. **Key Responsibilities** * **Firmware Development:** Program microcontrollers to stream high-frequency raw PPG and 3-axis accelerometer data. * **Data Jitter Control:** Ensure highly stable sampling rates and eliminate packet transmission lag. * **Time Synchronization:** Align raw sensor signals with timestamped reference cuff blood pressure readings. * **Signal Quality Testing:** Collect pilot data under physical edge cases (e.g., motion, induced vasoconstriction). * **Storage Formats:** Structure and log collected biosignals into clean binary, HDF5, or Parquet files. **Required Skills** * **Core Tech:** Embedded C/C++, Microcontrollers (ARM Cortex, ESP32, or similar). * **Communication:** SPI, I2C, UART, and high-speed USB/Serial communication. * **Data Parsing:** Python (for logging, synchronization scripts, and data serialization). * **Sensor Integration:** Experience interfacing with optical biosensors (PPG) and inertial units (IMU). * **Instrumentation:** Familiarity using oscilloscopes, logic analyzers, and basic hardware debugging tools.