Dian Mladenov

** ******, ****** ***** ********* CA 92688, cell:949-***-****

ac6gxn@r.postjobfree.com

Objective

Automation Industrial Control, Hardware / Software Electronic Design Engineer position in a creative, dynamic atmosphere with professional challenges and growth possibilities.

Profile

Accomplished and proficient professional. Detail and precision oriented. Strong analytical skills. Able to work well under pressure. Equally effective working as a team member or independently in diverse environment. Nonstandard solutions.

Technical Skills

Concept to verification and firmware. Schematic capture and architectural design, simulation, PCB layout, prototyping, verification and test/debugging. Hardware design and real time programming (digital and analog, mixed signals, microprocessor based), test and verification at all R&D level. R&D - PSpice (models, mixed, simulation, test), HDL, Verilog, RTOS, Embedded systems, CPLD, FPGA, Firmware. Various peripherals as: SPI, I2C, USB, UART, TCP/IP. Software development, device support (drivers) - Assembler, C, C++ programming, Android mobile applications. SoC.

Assembly and C, C++ languages (beard board programming, real time) (Microchip-PIC – 16C84, 16C64, 18F26K80, PIC32MX975F512L, PIC32MZ2048ECM144, 68HC11, MC68XX, MC68705, I8085, I8088), Spartan-3, Spartan-6 LX9, Xilinx, Windows 3.xx/95/98/NT/2000/XP, Linux, HP-UNIX - working knowledge. Audio, Digital video, Video synthesis and PAL, NTSC. Microprocessor Controllers Development System - Motorola MC68XX, IBM PC compatible, HP 9000 Series, Electronic Controls, Schematic, logic and architectural design, Motion control, PCB design, Post processing - (CADENCE, ORCAD, PROTEL, ALTIUM, CADSTAR, CAM 350), SolidWorks .

PLC automation. Turnkey projects, HMI (touch screen), SCADA implementation, DCS (serial and serial over TCP/IP) canbus, modbus, profibus, P&ID, SQL, OPC structures - Koyo, Fatek, Mitsubishi, Omron, Siemens, Allen Bradley. Design, manufacture, installation, software development, trouble-shooting, interfaces.

Professional Experience

Sep 2016 – present Knight LLC, Irvine, California

Sr. Electrical Engineer

Design smart HMI custom controller for chemical dispense system with web based control. Controller is based on PIC32MZ microcontroller with 6 RS485 ModBus connection to the I/O modules, ModBus TCP/IP connection to the gateway cell modem, LCD display 800x480 (with direct video RAM access), soft touch functions, SD card, USB, live firmware update over Ethernet … The firmware is based on PIC Harmony development system and Microchip TCP/IP stack, USB stack. Battery management system – hardware and firmware based on LTC6811 and PIC32MK.

Oct 2010 – Sep 2016 Ener-Core Power, Irvine, California

Electrical and Controls Engineer (Micro Turbine, Power)

Design, prototyping (hardware and software – Assembly and C) 32 thermocouples type K, reading and convert to serial ModBus to the PLC - RS232 and RS422/485 based on PIC. PCB - Cadence, PSpice, CadStar, CAM350.

Design, prototyping (hardware and software-C) GBR (Generator Braking Resistor-320kW/480VAC/3ph) control, safety, power/energy, temperature. Driver for ModBus TCP/IP based on (PIC32, PIC TCP/IP stack), temperature-TC type K, analog inputs voltage and 4-20mA, analog output voltage and 4-20mA galvanic separated.

Micro turbine (250kW- MT250) control and safety – PLC, HMI, sensors, valves (analog and digital for fuel, temperature, pressure, speed, fast over current, voltage, phase difference, standalone, grid synchronization), LabView. Peripherals control (oxidizer, blower, gas vaporizer, heat trace), based on PLCs-P3000, DL06, MicroLogix 1400. Energy balance – mechanical, thermal, electrical.

Feb 2008 – Sep 2010 PureLine, Irvine & Carlsbad, California

Design/Project Engineer (Electro Chemical Industry)

R&D and managing the project from concept to completion.

Identifying the necessary process control equipment and designing the electrical part of the system controlling - liquid and gas flow processing (temperature, pressure, current, voltage, pH, ORP), using pumps, thermocouples, flow meters, motion control (Servo and VFD drives).

Software development for PLC and HMI Mitsubishi, Allen Bradley, Koyo, Siemens for water treatment electro-chemical generator based on P&ID (piping and instrumentation diagram) and the electro-chemical process.

Assisting manufacturing with troubleshooting and resolving problems.

Design DCS using ModBus (RTU and ASCII, TCP/IP over/and RS232, RS422, RS485 data exchange) for connection with Wonderware, Horizons. Design process data collection, alarms and reports via GSM/GPRS, VPN or WebEx, e-mail alarm notification. GSM/GPRS, TCP/IP remote control and process data collection Prepare and execute final evaluation protocols, FAT(factory acceptant test), SAT(site acceptant test). Providing technical support as needed to the field service technicians and customers.

Reference: Technical Director – Chenniah Nanjundiah, PhD, tel:858-***-****

Oct 2006 – Nov 2007 Alderley Systems Ltd., United Kingdom

System Integration/Test Engineer (Natural Gas Industry)

Modifying and improving company standard product (crude oil control system) based on customer specifications using Allen-Bradley Control Logix, S600, VXWorks, Operational Software, SCADA (Citect), OPC (Matrikon) Server, Modbus (TCP/IP and RS422, RS485 data exchange), DCS, alarms, reports, P&ID, MOV, Ultrasonic Meters, Chromatograph. Making hardware improvements and software integration. Creating and performing test procedure to evaluate the parameters of crude oil. Design and assemble the necessary simulation equipment. Tracks the performance of the products by gathering data. Enters data generated through different tests and perform analysis and evaluations. Performing FAT.

Reference: Systems Manager – Martin Walls tel:+44 1454 292 191or +44-165*-***-***

Feb 2004 – Sep 2006 Self Employment Varna, Bulgaria

Automation Control Engineer – Industrial automation, design electronic equipment, custom applications

PLC automation (Fatek): recycling used cooking oil to bio diesel - control: warm up (PID), reactor (PID), destiller (PID), sediment, valves, pumps, limit switches, photo sensors, levels, alarms. Modbus communication, My SQL server. Concrete installation - control: flap valves, motors, limit switches, conveyors. Canbus communications, MySQL server – client, HMI, SCADA. Control for silo. Grain elevators chain – start/stop, protection, sequence control, level control, flap valves, temperature control, ventilation, alarms. Packing machine with thermo-folio. Motion control, valves, heating (PID), history, counting, opto – sensors, switches, alarms. PVC welding machine. Valves, heating (PID), motion for cleaning. Retrofitting, Upgrades (existing old machinery) field service, maintenance (PLC – Omron, GE Fanuc, Mitsubishi, Allen Bradley, Koyo, Fatek).

Architectural - schematic/PCB design, Assembler code– PIC16F628A based, software/hardware transform (optoinsulated) interface gas station pump to RS232C/485 standard.

Architectural - schematic/PCB design – amplifier and ADC boards for X-RAY machine. Amplifier boards – amplify signal from X-RAY sensors ( 1 pA dark current ) and digital decoding, even/odd, pseudo 3D imaging, power. ADC board – amplify signal, A/D converting 1MHz – 16 bits, data transmit – two USB channel. Write Assembler communication program based I8051.

Architectural design, development and test - Telex board - V.28 protocol. Firmware – Assembler.

PSpice simulation, HDL, Embedded system, Firmware.

Jun 2003 – Feb 2004 Melexis, Belgium Sofia, Bulgaria

ASIC Designer and Test Engineer

IC design. Architectural design, development (all the way project) and verification of specialize integrated circuit - PSpice (models, mixed, simulation ), HDL, Verilog, Cadence. Firmware – Assembler. Write programs for special testers ( XPEQT – electronic measurement equipment, Linux, C language). All errors analyzing. Technical documentation.

Verification of functionality and embedded software performance. Schematic and architectural load board design ( interface between IC and tester RTOS ), applications. PCB design. Assembler, C language, Linux.

Jun 2001 – Feb 2003 Americont Inc., Ontario, California, USA

Automation Control Engineer

Interpret customer s system performance and derive development targets. Provide detailed application user-case specifications. Execute projects according to management. Responsible for maintenance and upgrade strategies for own projects. Programming for PLC (Direct Logic, Koyo, GE-Fanuc) control unit and interface modules (ADC 16 bits, I/O) for temperature PID control, Injection molding, packing, vacuum, pressure control, RS232 /RS422 /RS485 report for data collection and analyze, profiles (files) memory organization, graphics presentation and, alarms history. Custom control panels. Upgrade existing systems Allen Bradley.

Schematic and architectural design, OrCad, PSpice, Assembler programming, RTOS, embedded systems, Firmware, PCB design - Orcad, CadStar, CAM 350 - multi layer configuration, thru-hole and SMD/SMT, analog and digital circuit. Whole system verification (factory acceptance test – company facility) . Front to end full electronic and mechanical design for the automatic and computer control. Motion control. Design automatic detail engraving system utilizing a computer controlled engraver.

Feb 1994 - Jun 2001 Air Traffic Service Authority Varna, Bulgaria

Electronic Engineer - MultiRadar Network System Administrator

Administration and support of HP-UNIX based computer network, which is processing data collection from multiple radar sources and display the air picture to the air traffic controllers. TracView 220 - Multiradar Tracking System - RAYTHEON (Hughes aircraft).

Contracts: Schematic/PCB design and test - PC controllers for support AirTrafficControl system (HDLC data entry - synthetic data from Secondary Surveillance Radar, Raw Video Converter - raw data from Primary Surveillance Radar to XY coordinates). Schematic/PCB design and test intelligent controllers based on 68HC11 and PIC processors 16C84, 16C64. Write assembler drivers and C program, RTOS, embedded systems, Firmware.

PLC automation (contractor): HVAC system (Unitronics based) – control: temperature in/out air, A/C, three way (flap) valves. Uninterruptible Air Supply (Unitronics based) : four piston air compressors in one air tank : run hours, temperature, pressure, maintenance alarm.

1986 - Feb 1994 Self Employment Varna, Bulgaria

Hardware / Software Engineer - Design and maintenance of electronic manufacturing equipment

Schematic/PCB design PC special peripheral controllers (ISA bus: 8 channel ADC/DAC 12 bits; 16 digital I/O; 8 ports RS 232; video controller for special effects PLL, PAL. PCB design: analog and digital circuits, high frequency circuits. Design controllers based on microprocessor/periphery MC68XX, MC68705, I8085, I8088 and write assembler program. Assembling tests and support of computer systems, IBM PC-compatible. Computer peripherals installation. Design LAN and customers support - network connectivity, Ethernet adapters, LAN administration, installation, settings.

Education

MSEE - Industrial Electronics Engineering

1985-1992 Technical University of Varna Varna, Bulgaria

1979-1983 Electro-Mechanical High School (AA degree) Dobrich, Bulgaria

2008 SolidWorks certified course Irvine, CA, USA

Nov 1999 certified course on RAYTHEON for maintenance system - TracView 220 Fullerton, CA, USA

Dec 1997 certified course on SONY-Europe DDM (Digital Display Monitor) division Varna, Bulgaria

Apr 1995 completed a course on HP-UNIX System Troubleshooting and Network

Administration at the Hewlett Packard' training center Vienna, Austria

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