Summary
Controls Systems Engineer with 40+ years of experience designing embedded control systems,
electronic hardware, and firmware across the automotive, industrial, and consumer electronics sectors.
Credited inventor on 7 patents (US, Taiwan, Malaysian). Owner of TMACHI LLC, delivering proprietary
control solutions for scooters, e-bikes, motorcycles, and industrial equipment to OEMs in Taiwan,
Malaysia, and the US. Proven track record from R&D through volume production, with products
installed in SYM scooters, Mitsubishi vehicles, and industrial engine test labs.
Patents
Inventor on the following patents (in collaboration with 瑞洲電裝股份有限公司 / Suitai Electric, unless noted):
- TW I565189 – Series Regulator Charging Device and Method
- TW I638913 – Car Charging Circuit
- TW I807626 – Cloud Based Diagnostic System
- TW I851960 – E-bike Power Control for Rider-to-Bike Interface
- TW I852768 – Drive Control Method
- US20080246532A1 – Method for Control over Mechanical Resonant System (2008)
- MY (2010) – Method for Determination of TDC from a 2-Stroke Waste Spark Ignition System for Direct Fuel Injection Applications
AI
Staying current with paradigm shifts in the way engineering work is being driven by artificial intelligence (AI), LLMs and agent harnesses.
Set up a Nvidia DGX spark (desktop-sized personal AI supercomputer powered by the NVIDIA GB10 Grace Blackwell Superchip) with vLLM to serve local large language models (LLMs). Using it with VScode/Continue for AI assisted coding. Currently working with the Qemma4 and Qwen3.8 27B models.
Set up an Openclaw Agent with RAG using Google's TurboQuant for vector search as a personal memory assistant as a project to learn this new technology and how to apply it.
Professional Experience
Control Systems & Electronics Design Engineer (Company Owner)
TMACHI LLC — Jan 2009 – Present
In cooperation with SUITAI 瑞洲電裝股份有限公司 (Taiwan) and Focus Applied Technologies (Malaysia):
- Designed a 25 A MCU-based 'series type' motorcycle voltage regulator for 3-phase PM generators (C firmware). Demonstrated 3 % fuel saving over shunt-type regulators. In production on SYM scooters in Taiwan & Vietnam.
- Designed a multi-function turn signal controller (MFTS) using an IMU chip to auto-reset signals after a completed turn (In production).
- Designed a patented e-bike rider-interface control achieving smooth, gear-less power delivery. (In production)
- Designed a proprietary engine cam timing controller to improve engine performance (joint development with SYM R&D Taiwain).
- Designed 8 kW e-motorcycle and 1 kW e-bike FOC motor controllers.
- Designed an Integrated Starter & Generator Controller (ISGC) eliminating the separate starter motor (SYM).
- Designed a scooter handlebar grip-warmer temperature controller (SYM, in production).
- Designed a fuel-pump DC-to-DC step-down converter for an electric hybrid scooter (PGO).
- Designed an Idle Stop Controller for scooters and motorcycles.
- Designed a suspension load-detection safety device (Taiwan patent pending).
- Designed a headlamp controller compatible with idle-stop systems.
- Designed an automotive steering-wheel driver-interface and accessories controller.
- Designed an automotive dashboard accessories controller — now in production in Mitsubishi 'Colt Plus' vehicles in Taiwan.
- Worked on motorcycle engine fuel-injection system controller (ECU) development.
- Designed HW & firmware (PIC assembly) for an engine dynamometer controller with embedded PID — in production, purchased by Modenas for their engine test lab.
- Designed an Electronic Fuel Injection (EFI) controller for motorcycle LPG conversion (HW, firmware, Orcad PCB). Demonstrated at Manila EnviroFit; in pre-production.
- Designed a motorcycle/automotive data logger for engine performance monitoring — in production, used by USM for vehicle data collection.
Control System Engineering Consultant
Heelomatic, Victoria, TX — Aug 2008 – Dec 2008 (contract)
- Software design for an autonomous mobile robot: real-time motion control of a DC-motor-driven dual-tracked 400 lb robot.
Control Systems Engineering Consultant
MechAssociates Inc., Victoria, TX — Aug 2007 – Aug 2008 (contract)
- Designed instrumentation and controls for an Oil & Gas drill-ship ROV tool-basket crane (SEW MOVIDRIVE vector drives, 3-phase induction motors, AB CompactLogix PLC, PanelView HMI over Ethernet). Implemented level-wind carriage speed/position control, cable direction/speed, electro-hydraulic actuator position, and tension interlocks in ladder logic. Generated test spec and authored operation manual.
- Designed instrumentation and controls for a drill-ship wench drum brake safety system (DirectAutomation DL06 PLC, drum-speed encoder, HPU, electro-hydraulic actuators, hydraulic caliper brakes). Implemented overspeed monitoring and brake actuation in ladder logic. Authored controls operations manual.
Control Systems Engineering Consultant
Omnilux Inc., Littleton, CO — Jan 2007 – Apr 2007 (contract)
- Designed a closed-loop control system to track and drive a high-Q resonant mechanism at its resonant frequency.
- Credited inventor on US Patent US20080246532A1 – Method for Control over Mechanical Resonant System (2008).
Senior Control Systems and Instrumentation Engineer
Mercer Controls Inc., Edna, TX — Mar 2004 – Jan 2007
- Implemented all PLC control, communications, and HMI screens for a large water-delivery system in Clear Lake, TX (AB SLC500/MicroLogix PLCs, Data-Linc Ethernet radios, Wonderware Intouch & PanelView HMI) linking 12 remote sites to a central master.
- Implemented closed-loop Dissolved Oxygen (DO) control for Tyler, TX wastewater plant (Toshiba PLC, VFD, Danfoss DO transmitter).
- Implemented inlet flow-rate control for Tiki Island, TX water plant (Toshiba PLC, CLA-VAL, Sensus flow meter) with daily volume-limit shut-off.
- Tuned level control for water-treatment filter tanks (Foxboro cascaded PID).
- Configured, started up, and tuned elevated storage-tank inlet flow control (RedLion PID + VFD).
- Implemented SCADA systems using spread-spectrum radio modems linking remote well sites to a central PLC/PC for monitoring and pump control.
Senior Control Systems Engineer
ControlSoft Inc., Goliad, TX — Nov 2002 – Mar 2004
- Designed and commissioned a backup temperature control for a steel tempering furnace with bump-less PID transfer on primary failure (AB SLC500, RSLogix).
- Designed sensor-selection logic providing fault detection and automatic switchover.
- Designed and commissioned Chlorination & De-Chlorination control for a wastewater plant using Internal Model Predictive Control and feed-forward — demonstrated marked improvement over original PID.
- Tuned PID loops for beverage-processing autoclaves to exceed FDA requirements (±0.5 °F at 260 °F) using Delta-V and Modicon DCS.
- Designed logic to interface a Supervisory Control System (SCS) to an ABB MOD300 DCS; configured Ethernet/OPC server link.
Advanced Process Control Instructor
- Prepared lecture notes, presentation material, and control-system simulations.
- Taught PID tuning and Advanced Process Control seminars to professionals in petrochemical, chemical, water/wastewater, manufacturing, pipeline, and metal-forging industries.
Engineering Director
Seagate, Prai, Malaysia — Apr 1995 – Dec 2001
- Achieved 15 successful product transitions from R&D (USA) to high-volume factory (Malaysia).
- Team credited with multiple product yield and quality improvements on every volume-factory launch.
- Developed the Malaysian product-engineering team to a "most respected" status.
- Completed Six Sigma Green Belt training and project.
Control Systems Design Engineer
Seagate / Conner Peripherals, Longmont, CO — Oct 1991 – Apr 1995
- Actuator-motor 'servo' digital control system; control-systems and firmware design.
Control Systems Design Engineer
Maxtor / Miniscribe, Longmont, CO — Jul 1988 – Oct 1991
- Read/write channel design (analog electronics signal processing).
Design Engineer
Interdyne, Austin, TX — Aug 1986 – Jul 1988
- Read/write channel design (analog electronics signal processing).
Design Engineer
Data General, Austin, TX — May 1985 – Aug 1986
- Tape-drive servo design (microcontroller firmware, control systems).
