Thursday, November 19, 2015

Hitachi - Engineering and Technologies

Hitachi is a highly diversified company with products and solutions in High Functional Materials & Components, Power Systems, Electronic Systems & Equipment, Automotive Systems, Digital Media...

Hitachi - Engineering and Technologies

Hitachi was founded in 1910 by electrical engineer Namihei Odaira. The company's first product was Japan's first 5-horsepower electric induction motor, initially developed for use in copper mining. Odaira's company soon became the domestic leader in electric motors and electric power industry infrastructure

Hitachi J100 adjustable and Variable frequency drive

Hitachi J100 adjustable and Variable frequency drive. Photographed by C J Cowie

Hitachi at Wikipedia 

Hitachi has contributed immensely to semiconductor and electronic manufacturing technologies.
  • 1958 Completed six-transistor miniature portable radio
  • 1959 Completed electronic computers based on transistors
  • 1966 Developed LTP processing technique for silicon transistors
  • 1978 Experimental color camera with solid-state miniature image device developed
Hitachi History

1976 Hitachi portable VTR, for Sony 1" type C; the source and take-up reels are stacked for compactness.

HITACHI 1 Zoll-C-Maschine - Video tape recorder

HITACHI 1 Zoll-C-Maschine - Video tape recorder

Tuesday, November 17, 2015

Learn Analog Op-Amps Circuit Design

delabs Op-Amp Circuits (painstakingly) updated, The basic circuits and notes. some related resources in those pages too. An interactive tutor is also available.


Learn Analog Op-Amps Circuit Design
This is just a formatted-edited email thread exported from Eudora from my mailbox using the content concentrator. The circuit above was made by TF a student, This thread for circuit above has been put online to share information. The part under "From: delabs" are my writing. there may be some mistakes and broken links.

Design of a Thermocouple Amplifier.

This is in continuation of the thread called "Design of a Thermocouple Amplifier" doc00023.html which is in the same section .

Design of a ADC Interface for Microcontroller.

I need a few tips from you on Analog design in general: I have seen that a lot of ADCs have a separate AGND and DGND, but they are shorted at the chip. I believe this is required to keep the noisy digital return paths sperate from the analog return paths.

Analog Ground and Digital Ground

Monday, November 02, 2015

Clean Rooms and Electronics

Clean rooms and Dust free environment is a must for Precision Mechanical Engineering. It is not MEMS or nano sizes, even micron sizes accuracy in parts can be affected by Dust and Humidity.

In Electronics, Timepiece Manufacturing, Medical Equipment and Scientific Apparatus companies. Clan Rooms ensure long term reliability and safety of the products not to forget Precision.

EE Design Library - Electronic Product Design Resource.

Even if a Place is partially Dust free, it is better to have all objects with the least surface area. The way Motors are designed, Interiors of houses even a Machine

Clan Rooms and Electronics

You can enclose objects with many contours and unclean-able surfaces within a Spherical or Cubical Transparent Cover, this is easy for inspection and cleaning.

Dust, Oil, Sand and Humidity makes Grime. Never allow Rodents and Roaches in the Workplace they are larger than 100 microns.

Resources - Electronic Firms and Electronic Projects.

Tools and Equipment must be maintained free of rust/corrosion and exposure to brine or chemical fumes. Metal tools must be cleaned, oiled and stored in dry places when not in use.