…Most people don’t know about the decade-long research and development effort by Bell Labs to make Picturephone work–piping a 30hz video signal (with 250 interlanced lines of resolution!) over an existing 1MHz bandwidth line. Pure analog communications, bootstrapped onto Bell’s vast telephone line infrastructure. I was delighted to find a June 1969 copy of the Bell Laboratories Record (PDF), the company’s bi-monthly magazine, dedicated to explaining Picturephone technology, complete with wonderful photographs and diagrams showing the set’s operations. I’ve uploaded it to Scribd here for easy reading. Bell took Picturephone to four cities, and businesses paid $160 a month plus 25 cents per minute to use the service. And even though it failed, the Picturephone was a fetching piece of hardware….
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Drone Racing investments
Wearables — Cut it to fit
Electronics — Electrolytic Limitations
Biohacking — Simple Tips and Tools for Three Common Sleep Disorders
No comments yet.
Sorry, the comment form is closed at this time.