The Library of Utopia People Power 2.0
Doug Engelbart and augmenting human intellect.
You've likely heard stories about the birth of the PC: of Xerox PARC as the Mecca of computing; of its creation of the Alto, Ethernet, and the laser printer; of the Homebrew Computer Club, the MITS Altair, Bill Gates and the theft of his Micro-soft Basic; of Steve Jobs and Stephen Wozniak, the founding of Apple, and the Jobs visit to PARC that inspired the Macintosh.
But what you may not know about is the really early history. The stories of Doug Engelbart and John McCarthy, of the Augmentation Research Center, and of the early days of the Stanford University AI Lab (SAIL) are not well known. Yes, you may have heard that Engelbart invented the mouse, and that SAIL and Stanford led to companies like Sun and Cisco. But there are better stories, great and old ones from the early days of computing, about the events that led to personal computing as we know it.
In his wonderful new book, What the Dormouse Said..., John Markoff tells these stories. Markoff was born in Oakland, CA, and has been covering Silicon Valley for the New York Times for more than a decade. From a distinctly West Coast perspective, Dormouse chronicles the origins of the personal computer and its place in the Bay Area culture of the 1960s. Having lived, intensely, the later part of this story, I am fascinated by the great back stories of people I came to know and, often, work with. Many of these stories were only vaguely familiar; many more, I'd never heard.
Voltage is the difference of electrical potential between two points of an electrical or electronic circuit, expressed in volts. It measures the potential energy of an electric field to cause an electric current in an electrical conductor.
Most measurement devices can measure voltage. Two common voltage measurements are direct current (DC) and alternating current (AC).
Learn the fundamentals of creating an AC or DC voltage measurement system. See how to properly connect the signals to your data acquisition system for accurate acquisition.
This document is part of the How-To Guide for Most Common Measurements centralized resource portal.
View full PDF >