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Tuesday, February 16, 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.

Monday, February 15, 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."