David Ko Email & Phone Number

Markham, Ontario

• Developed and reviewed test plans for SMU domain features enablement for system-level features.• Developed and executed test cases for unit-level functional and stress test scenarios.• Built automation and regression scripts for faster turn-around time.• Developed re-usable, scalable, collaborative test cases by interfacing with HW, FW and Design teams.• Studied firmware source code to have a better understanding of the features, it was very useful for triaged and debugged the issues.• Filed Jira tickets when issues happened during stress tests, defined ticket priority levels, and facilitated meetings to resolve root issues in a timely and effective manner.• Completed all assignments before deadlines.• Triaged and debugged regression issues.• Developed and maintained scripts and tools to continuously improve in products’ stability and efficiency.

Toronto, Ontario, Canada

● Took over and modified a rectifier/inverter module of a power supply for usage in data centers.● The MCU was Infineon 32-bit Aurix TC233 which has a shadow core to monitor the status of the main core. The product has been approved by UL and TUV agencies.● The communication of rectifier/inverter modules mainly used CAN protocol and used SPI, I2C and UART as well.● Assisted team members with their coding tasks to accelerate team progress towards project milestones.● Studied and learned ThreadX (RTOS) for Renesas Synergy microcontroller S7 series. Requested and acquired data using SNMP and TELNET protocols through network communications.● Used GitHub for firmware version control.● Used Jira for everyday tasks management.● Rearranged I/O pins to improve functionality and stability.● Debugged circuit board by cross referencing with schematic diagrams using Orcad and PCB layout using Allegro.

Toronto, Canada Area

● Designed and coded a battery module of a power supply for usage in data centers.● The MCU was Infineon 32-bit Aurix TC233 which has a shadow core to monitor the status of the main core. The product has been approved by UL and TUV agencies.● The communication of rectifier/inverter modules mainly used CAN protocol and used SPI, I2C and UART as well.● Conducted experiments (charge and discharge cycles) on battery modules to validate the manufacturer data sheet about the state of charge (SOC) and state of health (SOH) of the batteries.● Assisted team members with their coding tasks to accelerate team progress towards project milestones.● Studied and learned ThreadX (RTOS) for Renesas Synergy microcontroller S7 series. Requested and acquired data using SNMP and TELNET protocols through network communications.● Used GitHub for firmware version control.● Used Jira for everyday tasks management.● Rearranged I/O pins to improve functionality and stability.

Markham, Ontario

• Estimated and obtained management for the time, resources and budget required to perform the project.• Resolved technical issues for my group.• Provided direction to the team member.• Coordinated, designed and coded a digital BMI scale with Bluetooth (BLE) capability, worked with multi-MCU communication handshaking.• Designed and coded a series of electronic fireplace with mood-light, mp3, remote control features.• Designed and modified existing electronic programmable thermostat with new MCU from Zilog. • Created prototype boards for coding and debugging for new products.• Maintained and updated the revision changes of each projects.• Verified the content of the user manuals, made corrections if needed.

Toronto, Canada Area

• Researched and modified high efficiency electronics ballast for fluorescent and HID lamps.• Prepared documents and preformed in-house testing for UL approval.• Modified and made improvement of EMI suppression to meet new FCC part18 standard. • Modified existing products to meet new standard of energy star requirements.• Repaired and investigated failed ballasts and made improvements to the circuit to get the maximum profits for the company.

Markham, Ontario

• Estimated and obtained management for the time, resources and budget required to perform the project.• Resolved technical issues for my group.• Provided direction to the team member.• Researched, coordinated, designed and coded a new series of programmable thermostat, power meter, weather station, RF remote dimmer and radio control clock.• Improved the existing High Voltage of programmable thermostat to meet the new standard CAN/CSA-C828.• Implemented touch-screen LCD feature and/or wireless communication (RF) using Integration’s IA4421 on some advanced model of programmable thermostat.• Implementing PID algorithm on most of the thermostat.• Conducted studies and performed testability analysis on Automatic Test Equipment (ATE) to support findings and made recommendations for improvements on current and future technological changes.• Using different brand of MCU (such as Samsung, Microchip, ATmel and some others) to meet the requirements from the customers and cost for the production. Assembly and C languages are used for the coding.• Designed prototype circuits and drew schematic diagrams using Orcad. • Created prototype boards for coding and debugging for new products.• Created a build-in self test functions to ensure the products must perform the basic functions and to reduce the cost of quality assurance in productions.

Vaughan, Ontario

• Designed and code a new series of carbon monoxide detector to achieve more accurate and stable detection ability. That was the first carbon monoxide detector with LCD display in the market.• Conducted studies and performed testability analysis on Automatic Test Equipment (ATE) to support findings and make recommendations for improvements to ensure all products to meet ULC and/or UL requirements.• Implemented and enforced ISO 9001 engineering procedures.

Bachelor Of Science, Electrical Engineering

Bachelor Of Science, Electrical Engineering