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PTC – Mathcad Electrical Engineering Library

Ideas, Design, Simulation, Emulation and Testing. The fundamentals are governed by Math. The parameters, the metrics, the limits, the specifications. All have to be taken into account, none overlooked.

More Meticulous and exhaustive the pre-processing is, the less errors and shocks we get at the end of the product design cycle.

I have had my share of jolts, the only reason being, i did not anticipate that jack in the design engineers design box. Remember Murphy is always looking.


Here is a tool Mathcad and a module for EE. That helps us in our design goals. Standard calculation procedures, formulae and reference tables used by electrical engineers.

Electrical & Electronic Engineering from Hicks’ Adapted from the Standard Handbook of Engineering Calculations (edited by Tyler G. Hicks).

PTC – Mathcad – Engineering Calculations Software

Electrical Engineering Library - Mathcad

You will need to Login to Get to the EE Library of MathCAD

Interface a PC to Measure or Control Temperature

How to Use Your PC to Measure Temperature

Thermocouple, RTD, Temperature monitoring is central to the majority of data acquisition systems, be it to save energy costs, increase safety, reduce testing time…whatever your reasons, you will need a device to measure the temperature – a temperature sensor.

How to Use Your PC to Measure Temperature

Thermocouples, resistance temperature devices (RTDs), thermistors and infrared thermometers are all types of temperature sensor. Which you choose depends on factors like your expected maximum and minimum temperatures, the accuracy you need and your environmental conditions.

752-RTD: RTD Resistance Temperature Measurement, Digital I/O, Counting, Analog Output

  • Measure temperature using RTDs or Pt100 sensors, and voltage signals
  • With extra hardware monitor thermocouples and strain gauge bridges
  • Includes the powerful yet easy-to-use Windmill software for Windows: no programming required
  • Connect up to 8 USB units to one PC

Here is a way you can learn, How To Interface PC to the Outside World.

Temperature Control with a PC

This is a project that will help students learn both hardware and software aspects of a control system. Here you can test out an automation program on a PC with minimum external hardware.

When you implement in the field, the system has to be a dedicated real time uC based product on custom firmware. Systems with OS + Software combination are not known to be reliable in Process Control. But OS + Software is good for Supervisory Systems which get their data from Real Time Controllers.

So a front end controller must be Rugged, Non-PC based and Non-OS based unit. This means use something like Arduino. With a Robust and Compact (means fast) firmware.

The firmware should be Polling or Interrupt based but with both internal and external watchdog. Most important a Power supply Management that resets system properly over Brown-outs and Black-outs. Even today some Embedded Systems i have to turn off and on after power resumes.

Don’t Forget, Multiple Watch Dogs and Multiple Power Management for graceful start of system !! Use one big SuperCap if you want. Else people will go back to Thermostats.

Instrumentation for Process Control

A Resource of Value for Industrial Engineering. Here is an Online Textbook for learning advanced process control concepts.

The Process Control Education Web Site

Industrial Automation enables Higher skill levels for workers and reduces danger of accidents too. Now the emphasis is for Energy Efficient Industrial Production, not only to save Energy Costs but as a Social Responsibility.

Industries should not pollute water bodies and the atmosphere, this brings us to new process control area of Air and Water Quality Measurement and regulation.

The Reference includes Sample Process Control Course, Instrumentation for Process Control, WEB-Based Educational Resources for Process Control and Process Operability.

The Process Control Education Web Site

The material above can also be found on the -Process Control, 2nd Edition, McGraw-Hill, 2000 – ISBN 0-07-039362-1 a textbook by T. Marlin.

Process Control Instrumentation – McShane

New serial interface RS-422 improved upon RS-232 serial communications which was Noise prone. RS-422 uses two signal lines.

RS-485 enhances RS-422 with an ability to connect upto 32 devices. Now we have Industrial Interface methods like Zigbee, Ethernet, Modbus etc.

RS-485 Serial Interface – McShane, Inc.

Temperature Controller for DC Load and TEC

Temperature Controller for DC Load and TEC

Model 5C7-582 or Model 5C7-583 temperature controllers provide automatic biphase heating and cooling control for Thermoelectric (Peltier effect, or TEC) modules.

More about the Company

Founded by Philip Johnson in 1964, McShane, Inc. supplies process control equipment, OEM devices, and industry services from our location south of Cleveland, Ohio.

They also provide services like Leading Edge Custom Built Designs, Prototyping and Manufacturing.

McShane, Inc.
3633 Trails End Dr., Medina, Ohio, 44256-8770, United States.

DSP and VLSI Tutorials and Courses

Advanced course on VLSI system design has evolved from the lecture notes and the additional material used by Prof. Daniel Mlynek and Prof. Yusuf Leblebici in their senior-year course offerings at the Swiss Federal Intitute of Technology – Lausanne…

VLSI System Design WebCourse Design of VLSI Systems

Unified view of technological, architectural and design-related aspects of VLSI systems… See VLSI design flow

Current information on Embedded Systems for uC and ASIC Designers. Inside DSP – signal processing monthly. BDTI’s Pocket Guide – guide to processing engines for embedded applications covers DSP processors, CPUs, microcontrollers, and FPGAs. DSP Dictionary too.

Berkeley Design Technology, Inc. — Free Information

DSP Basics course online course which is free. Developed in 1998 it is light-weight but a valuable start for people new to DSP or in need of a refresher

Johns Hopkins University Signals Systems Control

The Scientist and Engineer’s Guide to Digital Signal Processing By Steven W. Smith, Ph.D. – Free DSP Book

Tutorials in Communications Engineering

The Java- Digital Signal Processing (J-DSP) editor is an Internet based signal processing laboratory that provides hands-on learning experiences in distributed learning environments

This site provides the current version of the book Introduction to Statistical Signal Processing by R.M. Gray and L.D. Davisson

DSPRelated.com since 1999, popular independent internet resource for Digital Signal Processing (DSP) engineers.

Prosig Noise & Vibration Measurement Blog

This tutorial with Java Applets is good to start with for DSP learning. DSP is a part of Embedded Processing. Also where Real Time Analog Meets Digital. Not that you will need DSP for everything. Simple equations can be implemented without DSP, but is an entry into the DSP world.

When complex waveforms in Audio / Video needs to be synthesized / manipulated. RF Communication related calculations too. More power and focus on math and speed makes dedicated DSP devices / software / specialization inevitable.

Digital Signal Processing Tutorial

Digital Stethoscope – Texas Instruments

TMS320VC5505 evaluation module and analog front-end module make up the new C5505 DS Medical Development Kit (MDK).

This will be useful for Medical Electronic Students.TMS320VC5505 is a Low-Power Fixed-Point Digital Signal Processor DSP. A project with this will probably build Analog and DSP Skills to a High Degree. Also when you make a Battery operated Medical device, Power Electronics basics will be understood. Build on this something more, not just a Stethoscope. Make it more sensitive to record the sounds of Joints on Movement. This may help diagnose Bone problems early.

Block Diagram (SBD) – Digital Stethoscope – TI.com

“The main elements of a Digital Stethoscope are the sensor unit that captures the heart and lung sounds (also known as auscultations), digitization, and digital processing of the auscultations for noise reduction, filtering and amplification. Algorithms for heart rate detection and heart defect detection may also be included.”

Ergonomics and Safety of the Workplace

Ergonomics and Manpower the Engine of Growth –  A Worker in One Firm is a Customer for another Firm. Healthy and Safe Workers implies a strengthening Consumer base.Just imagine what wonders it can do for the economy, when you broaden your view, think togetherness, as a Whole; not in isolated competitive groups, not in parts.

Ergonomics reduces Worker Stress. Helps in keeping good Mental and Physical Health. Safety is very important. His Limbs, Eyes and Ears are assets that a firm hires.

Ergonomics and Safety of the Workplace

A good Manager knows that Manpower is the Foremost Asset of any Company.

First Aid and Flame Resistant Uniforms

Tools and Apparel to make workplace safe. First Aid and Safety, Fire Protection and Flame Resistant Clothing. Cleanrooms  are very important for Microelectronics, MEMS and Precision Instrumentation.

In spite of “Prevention better than cure”, a worker can get injured, more so on the field, where preventive measures may not be in place. A Portable First Aid Kit that should be in Service and Commissioning Departments. A stitch in time saves nine. in reference to: “Your employees may require first aid at remote worksites, too.”

Worker Safety and Health Education

When we educate ourselves about a Hazard, that awareness is the first step of defense. Resources like this should have a Kids Section. Just like Nasa and Fcc have. We have to catch them young, Interactive tutors and Activities will prepare them for a Safe and Sensible future. Home, Garden, Transport and School are also like a Workpace.

Kids of recent generations are degrading intellectually, it is more so in the developed countries. Education has to be emphasized, Hobby DIY activities encouraged. Hardships simulated, so they become responsible Young Citizens.

Rockefeller Jr. (A Philanthropist) was brought up with such discipline, he was not allowed entertainment when he was young. His father the richest man in the US at that time.

Resource for Workers and Employers. CDC – Workplace Safety and Health

Intrinsic Safety and Zener Barriers

Designing and Building Intrinsically safe Industrial Systems is of paramount importance as Human Safety is involved. Even in Switching Loads some contactors, relays, circuit breakers and motors are hazards as some sparking becomes inevitable.

Intrinsic Safety – Omega.com

Solid State Relays are safer but on an overload even these can pose a fire hazard if a HRC fuse is not used. Sensor measurements must employ low voltages and currents. Even cabling management and hermetically sealed enclosures may be required when volatile fluids are close by.

delabs Notes – 2002 -2005