Mathews Technical Services, Inc. www.mathewstechnical.com (636) 723-3000

Listed below is a sample of some of the projects that we have done.

• Personal Computer Lan Card based on Mil Std 1553 signalling
• 4X32 Packet Routing Lan Hub using SDLC decode addressing logic
• Nicad Battery Charger Base
• UPS to Unix server interface
• 5 axis stepper motor control system based on 68HC11 processor
• Thermal printer control system
• Infrared FM transceiver for personnel to voice recognition interface
• 16X4 Stereo Audio line level switching matrix RS232 controlled
• IR LED array for opthamology research
• Computer to annunciator interface
• Vending Machine Single Price test unit
• Vending Machine Multi Price Test unit
• Vending Machine Multitester for single price, muliprice, validators, and MDB (multidrop bus) peripherals
• Vending Machine Multidrop Bus specific test unit with LCD
• MDB (multidrop bus) pocket tester for quick test of vending machine MDB power and signal status
• Bendix Arinc 423 and Arinc 453 Color weather radar to Personal Computer card to mount in personal computer
• Embedded Token Ring / Ethernet system (V25 - 80188) to enable SNMP (including Internet Protocol) for UPS to network connectivity
• Hardware Bus Interface Card from 68302 communication processor to personal computer ISA bus
• Relative Humidity and Temperature adapter to communicate via RS232 to host system
• Multiple File server to UPS interface unit for orderly power fail and shutdown processes on file servers
• Power supply for charging and boost converting for hand held instrument
• Modular DIN rail mount PLC programmed via RS-232 upload in Basic or Ladder logic
• Composite video generating embedded system to teach welding skills using CRT image and special electronic wands
• Genetic Module temperature and access control
• ABA track magnetic badge reader system including all analog head and digital hardware and software
• Vibration and shock disturbance analyzer for vault security
• CCD camera based imagers for low vision persons Handheld and desktop units with analog and digital video manipulation
• RS170 digital and analog video processing modules
• Halogen lamp drivers, White LED light sources, IR light sources
• Chromatography Experiment Sequence Controller
• Spot welding control for automotive panel welder including delivered energy monitoring and time control operation
• 8051 Based Single Board Computer
• V25 Based Single Board Computer
• Data Acquisition Pod for Personal Computer
• Stored Message Display for PLC or relay to LED alphanumeric message operation
• Piezo film sensor to allow disabled person's breath to operate computer menu selection
• Audio amplifiers, noise gating, reverb generating, tone control, companding, digitizing, digital storage and retrieval
• Scores of board assembly and module function testers for new product development, factory QC, and ongoing product support
• Analog composite video manipulation and colorization circuits
• Test equipment for inflatable object ultrasonic QC usage
• Operator annunciators to make GO/NO GO determination from floating point numeric result of digital QC process system using RS232 addressed array of coded LED devices
• 4-20 Ma analog instrumentation loop control system
• RS-485 multidrop control system for production control
• Switching power converters for 0-15VDC output from 7-40VDC input
• Many analog comparator and opamp based signal processing circuits
• Many digital logic based control and test circuits
• Scores of embedded controls based on microcontrollers including the PIC, 8051 family, 68HC705 family, 68HC11 family, Z-80 family, and the V25/80188 X86 compatible devices