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Saturday, January 07, 2017

Relative Humidity Table for Hygrometer

Wet bulb and Dry bulb Digital Humidity Meters or Hygrometers are accompanied with a chart for evaluating % RH. This chart is in PDF format below.

Table of Relative Humidity or RH 370 Kb PDF

The Sensors that could be used are Two RTD PT-100 and Two 48*96 Digital Indicators. The Wet bulb had a Moist Wick Compartment where water has to be refilled periodically.

Here are some Traditional Hygrometers. Even today these are used and work very well. Humidity and Temperature control is also important for HVAC - Heating, ventilation and air conditioning (HVAC).

Relative Humidity Table for Hygrometer

When Weaving Textiles, Humidifiers or Atomizers are used to maintain the Humidity of the Work Area where the Looms are running. A Horse Hair Hygrometer is used to Manually Monitor and Regulate the Humidity. In Offices where the Air Conditioning needs a Humidity regulation the method used to Determine Humidity is by using a Wet and Dry Bulb Hygrometer or a Sling Psychrometer. Human and Animal Health is also sensitive to these parameters.

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Monday, January 02, 2017

Smithsonian - The Chip Collection

The National Museum of American History's Chip Collection consists of individual donations of objects, images and documenation that traces the history of integrated circuits.

Smithsonian - The Chip Collection

The Chip Collection is a continuing work-in-progress concerning a small part of the permanent collection of the Division of Information Technology & Society's Electricity Collections.

ICE, originally located in Phoenix & Scottsdale, Arizona, was purchased after ICE's 30-year collection had been donated & accessioned by the National Museum of American History at the Smithsonian Institution.

Smithsonian - The Chip Collection

Pictures
This site's refrence pictures, diagrams, x-rays, thumbnail selections, and in some cases actual logbook pages in a single category to make your research faster.

Chip Fun
An important though unusual aspect of the history of integrated circuit technology is buried deep inside many chips, we call this chip art.

Sunday, January 01, 2017

Museum Of Electricity - Charles Brush

Yes, there were electric lights powered by central stations before Edison's! Carbon arc lamps saw extensive use throughout the USA and the world from the late 1870s on. - Charles Brush

Museum Of Electricity - Charles Brush

The General Electric Company was formed in 1892. It was the result of a meger between the Edison General electric Company and the Thomson-Houston Company, which themselves incorporated several other companies.

Museum Of Electricity - Charles Brush

Electricity, technology, and lots of arcs and sparks!

Museum Of Electricity contains Vintage Electrical and Historical images and description. They include the Edison Lamp, Tesla Coils, Lightning and Atmospheric Electricity and the .....

Amazing Jacob's Ladder

So how do they work?  First two conductive metal rods are positioned in a rough “V” shape with a slight space between them at the base.  A sufficient voltage differential is provided from a high voltage transformer to breakdown the air in the gap between the rods.

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