What: Designed and built a custom data acquisition payload for a NASA rocket launch

How: Used ESP32 with IMU, barometer, and battery monitor; data stored on SD and transmitted post-flight

Result: Selected among national teams; validated survivability of onboard “STEMnaut” payload with real-time flight data.

Skills: Embedded systems, FreeRTOS, SPIFFS, APRS communication, sensor fusion 

What: Solved heat problems in a small donut shop by automating the cooling system

How: Installed ESP32-based system with temperature sensors, dashboard, and remote alerts via Telegram

Result: Reduced in-store temperature, improved customer comfort, and prevented equipment overheating

Skills: IoT integration, ESP32, sensor calibration, web dashboard, alert system 

What: Upgraded an old horizontal band saw by replacing the CNC controller with a PLC-based system. Fixed issues with encoder accuracy and user interface.

How: Replaced the CNC controller with a Mitsubishi PLC, implemented a PID control loop for encoder precision, and developed a bilingual HMI (Khmer & English) for operator convenience.

Result: Machine now operates fully with PLC control. User interface is easier to understand, and encoder accuracy was significantly improved for better cutting performance.

Skills: PLC conversion, HMI design, PID tuning, multilingual UI development

What:
Built a custom control system for a water treatment plant to manage water flow, motor operation, and chemical mixing. Included HMI for local control and SCADA system for remote access via app and website.

How:
Programmed a Wecon PLC and designed a PI3060 HMI for operator control. Developed a SCADA system using Vbox, enabling remote access from both web and mobile devices. Implemented motor interlocks, Modbus RS485 communication to control the inverter, and used an ultrasonic flow meter to monitor flow rate and transmit data via RS485 to the PLC.

Result:
The system now allows full control of the inverter and valve timing from HMI, phone, and website. Achieved precise chemical mixing ratios based on client specs, improved water treatment accuracy, and minimized manual error.

Skills: PLC & HMI programming, SCADA development, Modbus RS485, ultrasonic flow sensing, remote control integration

What:
Developed a gas detection system called Axis GTP. Supports up to 20 wireless sensor nodes, delivering real-time alerts via Telegram without relying on cloud services.

How:
Each ESP32 node sends data wirelessly to a central hub using ESP-NOW. Sensor readings are filtered using a combination of Kalman and moving average algorithms to reduce noise.The system includes configurable gas thresholds and node health monitoring.

Result:
Achieved accurate, reliable gas detection with an 80% reduction in false alarms. Designed for easy deployment in kitchens, workshops, and industrial spaces. Entire system runs offline, with real-time alerts and status checks via Telegram, and can be easily expanded.

Skills: ESP-NOW mesh, Kalman filtering, MQ-5 sensor integration, Telegram bot API, wireless IoT system design