Monday, April 22, 2019

Capilano Computing - DesignWorks Schematic Capture

A well known firm in software tools for electronic design. Incorporated in 1982, Products Include Designworks Professional, DesignWorks Simulator and LogicWorks.

Capilano Computing - DesignWorks Schematic Capture

"DesignWorks Professional 5 doesn't just provide an environment for a single goal. It allows you to recapture your investment dollars by being flexible enough to handle all your design goals, be the goal a PCB design, Spice analysis, or simulation. You are not locked in to one PCB or simulation vendor."

LogicWorks 5

What is LogicWorks 5

LogicWorks is an interactive circuit design tool intended for teaching and learning digital logic. No other software tool makes digital design easier, faster or more interactive than LogicWorks. The package gives you the power, speed and flexibility to create and test an unlimited number of circuit elements on-screen.

New in LogicWorks 5 for Windows is the ability to use a subset of the standard VHDL language to describe and simulate circuits. Hardware designs can freely mix devices and circuits described as schematic diagrams with blocks described textually using VHDL. See our VHDL page for a description of the language implementation in this version.

Capilano Computing
2631 Vikining Way, Suite 218  Richmond BC, Canada V6V 3B5

Thursday, April 18, 2019

Electricity and Magnetism - Molecular Expressions

These Tutors which are Interactive as well are useful for Students and Enthusiasts to enhance the Text Book reading.

Electricity and Magnetism - Molecular Expressions

These pages are good for any person who want to be more familiar with magnetism and electricity. This probably means everyone. Today Electricity Basics is General Knowledge and also an Absolute Essential.

Museum of Electricity and Magnetism - From the world's first "south-pointer" (an early compass) to modern instruments such as the magnetic force microscope, the Museum of Electricity and Magnetism on our sister website at the National High Magnetic Field Laboratory will introduce you to a variety of instruments, tools and machines devised over the centuries.

Electricity and Magnetism - Molecular Expressions
Faraday's Magnetic Field Induction Experiment

In 1831, Michael Faraday made his discovery of electromagnetic induction with an experiment using two coils of wire wound around opposite sides of a ring of soft iron similar to the experiment setup below.

Wednesday, April 17, 2019

Calculators and Electronic Design Aids

Calculators are Tools that can get you math right for you. Many need this aid as they cannot quickly learn number patterns. EE design needs many custom calculators to make product development easy.

Calculators and Electronic Design Aids

Martindale's Calculators - Electrical Engineering - Engineering Unit Conversion & Scientific Calculators

Electronics Calculators - These calculators are useful when configuring the headphone amplifiers discussed on this site.

ESBCalc is a Freeware Scientific Calculator for Windows with Infix Notation, Brackets, Scientific Functions (Trigonometric, Hyperbolic, Logarithmic - including Base 10, Base 2 & Natural - plus more), Memory, Paper Trail, Result History List and more. v5 Includes support for Prefix functions so to evaluate log (10) you can enter log 10 rather than 10 log (which is the default behaviour)

ESBUnitConv is a Free User-friendly Windows Utility to easily convert between units of measurement. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Flow, Torque, Angles, Luminous Intensity, Illumination, Time & Radioactivity.

Electronics Calculators Index - EE, RF, Power and Passive Component calculators. Semiconductor device and circuit calculators.

The Chemandy calculators are designed to be easy to use and follow a common theme and layout where possible. Most of them have been used for several years now and complaints about their accuracy or functionality are very rare.

Tuesday, February 19, 2019

Manual of Engineering Information

Here are useful EE Reference Documents by Ohmite. Ohmite had created a useful manual that helps proper resistor and power component selection. There is also a valuable reference on Resistors.

Application Notes at Ohmite

Some of these EE Reference documents are decades old but are Absolute Scientific Documents that an Engineer or Student can refer to.

Ohmite Applications

Resistor Terminology and Ohm's Law Guide - Ohm’s Law defines the relationships between (P) power, (V) voltage, (I) cur-rent, and (R) resistance. One ohm is the resistance value through which one volt will maintain a current of one ampere

Manual of Engineering Information - An Excellent look at the Basics of Electrical Resistance.

Key to Five-Band Code -This is one code that is Colorfully Encrypted and can only be deciphered by Electronic Enthusiasts.

Monday, February 18, 2019

Circuits using only discrete devices

Here are circuits made of Resistors, Capacitors and Inductors which are passive components. Crystals, Thermistors, Varistors, Variable Passive RLC are also Passive Parts.Some circuits documented from my design note book are here with the editable schematics.

Circuits using only discrete devices

Zeners, Diodes, NPN-PNP Transistors, FET, MOSFET, SCR, Triacs are all discrete active devices. ICs and Hybrid Modules are made of many discrete and passive components.

Circuits using only discrete devices

In the Integrated Circuits or ASICs, all parts even passives are derived on the Silicon Wafer. In Hybrid Modules the construction uses SMD or Tiny Chip components interconnected in a small ceramic PCB and Hermetically Sealed if needed.
Parts like Switches, Connectors, Relays and PCBs are ElectroMechanical parts. Nuts, Bolts, Screws, Cabinets and enclosures are Mechanical parts.

For a Systems Integrator or Control Panel Designer, the Timers, Controllers, PLC which are Electronic Products become Components or Modules along with Contacters, Current Transformers, AC-DC Drives etc.

Saturday, February 02, 2019

Basic Electrical Circuits

Electrical Engineering encompasses Everything in Electronics. Communications, Computers etc. are further specializations of Electronics. So it is best to Identify Electrical Circuits with Electrical Designs which excludes Active Devices. It can include Electronic Products in the form of wireable modules.
So House and Factory wiring, Appliances like Ovens, Toasters, Power Generation and management; all these are electrical. Motors, Generators, Connectors, Relays, Contacters and Circuit Breakers are Electrical Components.

See a diagram i made for a Sequential Process Control Unit, custom built for Vacuum Impregnation;

Sequential Process Control - Vacuum Impregnation

A Radio or Power Inverter is Electronic. When an Inverter or Electronic AC-DC Motor Drive is used in a Control panel or Power Supply system, that integration is shown as an Electrical Circuit. I feel Simple Consumer Electronic Circuits using Diodes, Transistors, SCR, Capacitors and Resistors can also be taken under electrical circuits; when they are used in Mains-Power or Household Appliances. Solar Energy related circuits also can be studied under Electrical Power Circuits.

In Electronics RF-Microwave and Communications is a specialization area, Computer Hardware, Software, Internet form another major domain. Networking and Wireless data communication overlaps both the above.

Power Electronics and Instrumentation are fundamental domains needed for many. Industrial Automation with Process Control Instrumentation is unique, but is supported by the fundamental domains. Many more finer areas like Robotics and Medical Electronics have a much sharper focus.

Basic Electrical Circuits - delabs

delabs Technologies

Thursday, January 24, 2019

Display ICL7107 - Temperature controller

This is the Display Circuit and PCB part of of section Temperature Control. Displays should be visible in moderate sunlight or factory lighting. Red Led displays are best for this type. Have a hood on the display area to avoid reflections.

The above circuit is powered by +5 and -5 from a LM7805 and LM7905 pair. If +/- 12V or +/- 7.5V is used in opamp or digital parts, then use below circuit for the DPM section.

The ground/earth should be good to get a stable reading, the sensor connections should be sound. It is better to earth the metal DIN enclosure to make the device immune to EMI-RFI.

5 V Dual Supply with Zeners

A Steel DIN Enclosure may be difficult but can give your Industrial product Noise Immunity, Powder coating of the cabinet gives it some insulation and aesthetics too.

The PCB for above
The PDF Circuit for above Display Card STC1000 

The PCB copper tracks have to be tinned. Protection coating, masking must be good. Use RTV compound cover on completed PCB, for using in corrosive environments.

Wednesday, January 23, 2019

Tutorials for Electronics - Williamson Labs

These are simple and easy for learning, it is oriented towards practical electronics. It has a rich experience of Glen, who has seen the real electronics engineering as it evolved.

Tutorials for Electronics - Williamson Labs   Wayback Copy
  • Ergonomics
  • Elementary Electricity
  • Engineering NOTEBOOK
  • Intuitive Electronics
  • Design Flow Chart
  • Transmission Lines
  • Mixers & Modulation
Williamson Labs and The Laws of Glen

Engineer under Construction

School Should Emulate Industry: - The Project Oriented Approach: Enables the Learn by Doing Paradigm.

Glen is like the Murphy for Electronics Engineering. There has be a "Laws of Glen" one can digest and precipitate from his valuable writings.

Tuesday, January 22, 2019

Analog Electronic Circuit Design

The very first designs that came about were analog designs, a Vacuum Tube amplifier is an example. Analog is the representation of data or physical parameter in an accurate and precise decimal number like + 72.182 mV. The greater the resolution required, the more demanding is the design for achieving high accuracy and low drift. Digital circuits have only two voltage levels, high and low, the third state of floating, Hi-Z or high impedance is only for multiplexing or sharing a bus. This is done so that devices dont drive into each other and it is also used in external port drivers.

Analog Design and Circuits

As an analogy, see the conventional water tap as an analog control, an electric light ON-OFF switch as a digital control.

Bob Pease - Analog Guru

Among the semiconductor products Bob designed are temperature-voltage frequency converters used in groundbreaking medical research expeditions to Mt. Everest in the 1980s. He also designed a seismic pre-amplifier chip used to measure lunar ground tremors in the US Apollo moon landing missions. Among his more memorable designs are the LM331 voltage to frequency converter and the LM337 adjustable voltage regulator. - Remembering Bob Pease

Analog Circuits Instrumentation


Basic Electronics
Basics of Electronics
Product Production
Work Discipline
Testing Points
Learning Electronics
Electronics Theory

Production Notes
Prototype Fabrication
Electrical Circuits

Scots Guide Electronics
Engineering - Wikibooks
Design Lab - Jim Svoboda
DC Circuits UOG
Socratic Electronics
Blobz Guide Electric Circuits

Product Design
Product Development
Constant Current Source
Good Voltage Regulators
Insulation Resistance
Digital Insulation Tester
DN Schematic PCB 04
DN Product Design 07

Hobby Circuits
VU Meter Circuits
LED brightness control
555 Incredible Chip
Process Control
liquid level measurement
Thermocouples and RTD
Design ADC Interface uC
Thermocouple Amplifier
IA Instrumentation 02
Temperature on DMM
Optical Proximity Switch
Analog Mux - Data Acquisition

Test Measurement
Instrumentation Automation
NI Test and Measurement
DMM Digital Multi Meter
Oscilloscope in T&M
IA Automation 01
Build Instruments
Tektronix T&M Equipment
Educators Corner – Agilent

Power Electronics
UPS Background
Transformer Connections
DN Power Electronics 03
DN Power Electronics 02
Half Bridge Convertor SG3525

Interfacing Microcontrollers
Embedded Process Control
80C31 8052 Microcontroller
Microprocessors and uC
Embedded Systems Design

Good Voltage Regulators
Relays and Contactors
Potentiometers Trimpots
Prototype Boards Types
Types of Capacitors
Types of Switches
Resistors How they Work
Coils Transformers SMPS
Mains Transformers Types
DN Components Selection 05

Tutor Gadgets
Count-Up Timer
Digital Logic Gates
Electronics Tutors

Teaching Instruments
Charles Proteus Steinmetz
Muntzing a Circuit Design
Teralab Electronics projects
Historical Instruments

Tables, Charts, Videos
Binary and Hex
Resistor Color Code
Ohms Law
Giga, Tera, Pico, Nano
High Resistance Materials

School - Analog Design
DN Analog Basics 06
DN Op-Amps 01
TI Semiconductors

Hobby DIY Garage