David J. Pfaltzgraff

271 Western Ave., Room 317

Lynn, MA 01904




Versatile design engineer with extensive experience in hardware and software systems and integration. Implementations range from single microprocessor embedded applications to multi-node networked systems. Special considerations include hardware redundancy, database integration and user interfaces. Good organizational and communications skills. Managed diverse teams resulting in successful products and implementations. Excellent documentation skills addressing both technical and non-technical audiences.



Assembler for PDP-8, PDP-10, PDP-11, IBM-360, 8080/5, 8051, Z80, 64180, Bit slice
Fortran, BASIC, FOCAL, PL/M, Pascal, C, C++, Java, Perl, Javascript, Tcl/Tk

Operating Systems

Many proprietary, DOS, QNX, Windows, Linux including m CLinux, and FreeTOS

Other software experience

PostgreSQL, MSAccess and FoxBase databases

Proficient in MSWord, Excel, MSVisual C/C++, Borland C/C++ and GNU tools

Hardware Architectures

PDP-11 UNIBUS, LSI-11 Q-BUS, Multibus I, PC ISA and PCI buses
8080, 8085, Z80, 64180, 8051, 80188/6, 68EN360
RS-232, RS-422, RS-485, Ethernet
DMA Master, Interrupt
Microchip PIC18, PIC24
ARM TI and NXP(Freescale)


Pitchfork Solutions (2002 to present)

See the primary web site at Pitchfork Solutions. In this capacity, I have continued to provide hardware and software design services to a wide variety of clients.

Patapsco Designs, Inc., Frederick, MD (1984 - 2002)

Patapsco Designs provided custom electronics design and manufacturing services. The services provided for any particular project would be customized to the client's need. Thus, any specific project could involve hardware design, software design, and manufacturing, or any combination.

Staff Engineer (1998 - 2002)

IT Manager (1992 - 1998)

Design Engineer (1984 - 1992)

Frederick Community College, Frederick, MD (1991 - 1992)

Physics Instructor

Digital Systems, Walkersville, MD (1982)

VP, Engineering

Frederick Electronics Corporation, Frederick, MD (1974 - 1984)

Frederick Electronics Corporation specialized in Telex switches which were sold internationally.

Staff Engineer (1976 - 1984)

Instructor (1974 - 1976)

Elizabethtown College, Elizabethtown, PA (1970 - 1974)

Physics Instructor


BS, Physics, Elizabethtown College, Elizabethtown, PA

MS, Physics, Drexel University, Philadelphia, PA

Research: Remote determination of wind through the use of backscatter.

MS, Computer Science, Hood College, Frederick, MD

Research: Use of HP/GL as input for process control


SPS Sigma Pi Sigma (Physics Honor Society) Inducted 1967
American Association of Physics Teachers 1967 - 1974
American Institute of Physics 1967 - 1974
IEEE since 1977


"Analog Simulation of the Bouncing Ball Problem", American Journal of Physics, 1969
"The ELTEX II Telecommunications Exchange", ISSC '76, Kyoto, Japan
"Integrated Services Switching", Telecommunications, September 1979
"The Use of Linux in an Embedded System", on-line publication of Linux Journal to be found at: https://www.linuxjournal.com/article/3555 , December, 1999.

Last updated: March 24, 2020