Wednesday, February 17, 2016

Wandel and Goltermann - Communication Instruments

Just like Rohde and Schwarz which is a world leader in Communications Test Equipment, There was another from Germany called Wandel and Goltermann which made specialized RF Test Instruments.


A short history is Wandel and Goltermann became Wavetek Wandel Goltermann (WWG) and then Acterna,

See  Willtek Company History. Above are scans of a old catalog of Wandel and Goltermann.

Tuesday, February 16, 2016

Power Electronics Java Applets

Some very useful, educative and interactive Java Applets. Tutorials around Power Electronics. Includes Diode and SCR Circuits, Controlled 1/3 Phase SCR-Thyristor Bridge Rectifier and Switch-Mode Power Supplies SMPS.

Power electronics-interactive text

They include Simple diode, SCR and thyristor controlled bridge rectifier circuits and most important the Switch-Mode Power Supply SMPS.

Interactive Power Electronics Seminar (iPES) 

Interactive Power Electronics Seminar

The following Java applets are part of the Introductory Course on Power Electronics taught by Prof. Kolar at the ETH Zurich. The interactive and animated applets are used as aid for teaching in the classroom and are displayed using a laptop and a beamer. Furthermore, the applets do provide an opportunity for the students to experiment and learn at home more efficiently.

Here some power electronics design info is available. Switching-Mode Power Supply Design

At Alexandre Manuel Mota's pages you will find - Op Amps for Everyone Design Guide, History of Switched Mode Power Supplies, DC Power Supply Handbook, SWITCHMODE Power Supply Reference Manual, Linear & Switching Voltage Reference Handbook. The above PDF files seem to be good study material, before you design and build your next power supply, SMPS or AC/DC converter. - delabs

Power Supplies and SMPS Section

Circuits of SMPS, Power Supply, Switch Mode Power Supply are here. High Voltage Power Supply concept. DC Regulated 3 Pin Power Supplies like 7812 and 7805. Workbench Supplies.

Electronics Concepts at HyperPhysics

HyperPhysics is an exploration environment for concepts in physics which employs concept maps and other linking strategies to facilitate smooth navigation. For the most part, it is laid out in small segments or "cards", true to its original development in HyperCard. The entire environment is interconnected with thousands of links, reminiscent of a neural network..

Electronics Concepts at HyperPhysics

Students should go thru this website from cover-to-cover, It is a work of knowledge that is priceless

Ampere Law at HyperPhysics

Ampere's Law at HyperPhysics

"Ampere's Law states that for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop."

Contents

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

Production Notes
Prototype Fabrication
Electrical Circuits
Electromechanical


Library
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


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

Components
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

History
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

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