Most electronic products require some sort of embedded microprocessor. For smaller projects HED
employs the Motorola 68HC05/11, the Microchip PIC family, the Intel 8051 derivatives, and other
families of microcontrollers to meet your embedded processor needs. For many of these projects
HED writes tight, hardware oriented Assembly Language Software for the chosen processor.
For larger, more powerful real-time Embedded Systems, HED can design a custom solution utilizing
DSP Processors, the Motorola PowerPC, or Intel Processors along with Flash and SDRAM memory
technologies running on embedded operating systems such as VxWorks. We also provide Embedded
Internet controller solutions featuring TCP/IP and UDP.
Our extensive experience with TI and Motorola Digital Signal Processors (DSPs) can provide the
solution to your toughest signal processing problems. We have experience with fixed and
floating-point processors using 16, 24, and 32 bit sampling for applications such as audio/video
processing and vo-coding, spread-spectrum RF, medical instrumentation, motor control, encryption,
and compression. We can custom-design digital filters and other DSP algorithms to suit
Nearly every new product requires some amount of digital logic. In addition to standard logic
families (TTL, CMOS, ECL), HED employs XILINX and ALTERA Field Programmable Gate Arrays FPGAs
as well as PALs (Programmable Array Logic) for applications which require high gate count.
We can design an attractive and user friendly Keypad and Display for your product using LED
or LCD display technology. Interfaces such as RS232, I2C, USB, RS485 and 10/100 Ethernet
can be included to communicate with computers or other equipments. We also feature Infrared
and Ultrasonic designs and can implement low power circuits for Battery Powered
HED is an experienced designer of many types of analog circuits including Precision Audio,
Telephony, Waveform Synthesis, Analog Filtering, Control Loops, and Power Supply design. HED
specializes in low noise analog designs and utilizes proper circuit board layout techniques
to minimize signal crosstalk and EMI.
HED can develop a Wireless product employing separate Transmitters and Receivers for
communications systems whose frequency extends into the microwave bands.
HED designs systems which incorporate RF Filtering, PLL's (Phase Locked Loops)
and DDS's (Direct Digital Synthesizers) for a completely synthesized RF design.
We also use DSP technology and chip sets to provide spread spectrum / frequency
hopping transceiver designs.
PC Software Design
In addition to firmware for embedded processors, HED also writes software for the PC
platform. Software for Win95/98/NT/2000 operating systems include C, C++,
Visual C, Visual Basic, and other languages. We can design custom applications for your
equipment control or business needs. Software is documented to your requirements.
HED is an experienced designer of interfaces to the PSTN (Public Switched Telephone Network)
and can implement designs compliant with the rigorous FCC requirements. Loop-start and
ground-start interfaces are possible as well as DTMF signaling designs. HED also designs
telephony to European and Australian standards.
Schematic Capture and PCB Layout
HED uses Accel EDA V14 CAD software and provides in-house Schematic Capture
and PCB (Printed Circuit Board) Layout. For high density designs HED uses the Mentor
Graphics Suite for tight control over impedance matching and trace lengths.
Our CAD systems allow us to develop Multilayer Boards
using Leaded or Surface Mount technology. The customer is supplied all Gerber and NCD Drill
File information as well as all schematics, parts lists, and assembly drawings.
Enclosure Design and Packaging
Many new products require an electronic enclosure to house the circuits. HED works closely
with different enclosure manufacturers to provide cost effective solutions in both ABS
Plastic and Sheet Metal. For those applications which require weatherproof or ruggedized
enclosures, HED utilizes vendors of NEMA approved enclosures.
Industry Certification Testing
Nearly every electronic product sold on the commercial market requires industry certification
such as FCC, UL, CE-Mark, etc. First and foremost, HED designs its products to give the highest
probability of testing compliance. HED then acts as an Agency Liaison with Certified Laboratories
to provide you with any necessary Acceptance Testing which is usually a precursor
HED provides Manufacturing Services which include all PCB fabrication, parts procurement
and kiting, assembly, and finished product testing. For projects which require High Volume
Manufacturing, HED enlists Domestic or Overseas manufacturing facilities. Alternatively,
we can provide you with all the necessary documentation to allow you to select a manufacturer
of your choice.
Reverse and Re-Engineering
Many customers find that they need to Upgrade Existing Designs to keep pace with rapidly
moving technology. HED provides re-engineering of an existing product to utilize the
latest available components, achieve miniaturization, and decrease parts count and expense.
Typically, the fewer the number of parts, the lower the cost and the higher the reliability.
Similarly, as products become older or obsolete the original design information can become
lost or corrupted. HED provides Reverse Engineering of an existing product to recover
lost design information.
An unbiased assessment and a "fresh set of eyes" can uncover design problem before production
starts. If the design is sound and the documentation in order, the review will be quick and
cost effective. If design problems exists, the review can avert expensive manufacturing
problems such as high production failure rates.