IBM Selectric Typewriter & its digital to analogue converter
engineerguy4 HN recommenders · recommended in 5 months, 2016-2025
1.1M views · 16 years ago · explainer · evergreen
Bill Hammack of engineerguy uses slow motion video to show how the IBM Selectric typewriter works. He focuses on its fully mechanical digital-to-analog converter, which turns key presses into rotation of the type ball.
HN commenters recommend it whenever the Selectric comes up, as a short, excellent explanation of its internals.
3:39(1/4) Intro/History: Introducing a 100-year-old mechanical computer
engineerguy
476K views • 11 years ago
20:13The Most Powerful Computers You've Never Heard Of
Veritasium
13.7M views • 4 years ago
41:53Mechanical Computer (All Parts) - Basic Mechanisms In Fire Control Computers
Excelsior10000
483K views • 15 years ago
23:04The Computer-free Automation of a Jukebox (Electromechanics)
Technology Connections
1.3M views • 6 years ago
19:43U.S. NAVY BASIC MECHANISMS OF FIRE CONTROL COMPUTERS MECHANICAL COMPUTER INSTRUCTIONAL FILM 27794
PeriscopeFilm
225K views • 8 years ago
4:37Making Money Flow: The MONIAC
Reserve Bank of New Zealand
120K views • 9 years ago
27:49My old BBC Micro system
mikeselectricstuff
70K views • 9 years ago
9:20An astonishing old calculator - Numberphile
Numberphile
794K views • 8 years ago
31:39The Secret Life of the Radio - Remastered
tim hunkin
359K views • 5 years ago
2:08:02Alto System Project: Dan Ingalls demonstrates Smalltalk
Computer History Museum
36K views • 7 years ago
2:03GE Walking Truck - Cybernetic Anthropomorphous Machine (CAM) 1969.
Reuben Hoggett
248K views • 16 years ago
6:53Building The World's First Computer - Greeks, Clocks and Rockets - Antikythera Mechanism Episode 1
Clickspring
1.1M views • 9 years ago
1:02:28A History of The ARM Microprocessor | Dave Jaggar | Talks at Google
Talks at Google
22K views • 7 years ago
16:48Yesterday's Computer of Tomorrow: The Xerox Alto │Smalltalk-76 Demo
Computer History Museum
38K views • 8 years ago
7:26Teletype Model 19 - Part 1: A Teletype Arrives for Restoration
CuriousMarc
33K views • 8 years ago
24:30Bill Atkinson: Polaroids showing the Evolution of the Lisa GUI
Computer History Museum
13K views • 1 year ago
0:29Dial Up Modem Handshake Sound - Spectrogram
Bitcore
3.6M views • 13 years ago
2:55:13Oral History of Gary Davidian, part 2 of 2
Computer History Museum
2K views • 7 years ago
15:15Symbolics Space Cadet keyboard review (Honeywell Hall effect 4B3E)
Chyrosran22
259K views • 8 years ago
11:131979: Will WORD PROCESSORS start a HOME WORKING revolution? | Past Predictions | BBC Archive
BBC Archive
461K views • 4 years ago
8 comments from Hacker News
Bill Hammack (engineerguy) has an excellent video on the IBM Selectric titled IBM Selectric Typewriter & its digital to analogue converter .[1] [1] ▶ this video
To deepen the wonder, I'd be interested to see the longevity per material (PLA/Nylon/metal/...). I'd expect a lot of trial and error to deal with shrinkage and the probably high precision needed by the Selectric. But this is a great repository, thanks a lot! P.S. excellent short video by Bill Hammack on the Selectric internals: ▶ this video
The Selectric is a fascinating machine. I highly recommend watching "IBM Selectric Typewriter & its digital to analogue converter"[0] by The Engineer Guy. [0] ▶ this video
You might enjoy these. IBM Selectric Typewriter & its digital to analogue converter ▶ this video The Whiffletree: A mechanical digital-to-analog converter link
One of the interesting things about the Selectric is that it contains a mechanical digital-to-analog converter .. a Whiffletree mechanism. ▶ this video
A distributed system will never be as intuitive as MS Word, which is basically the digitized version of stone tables, or papyrus, or whatever thousands of years old thing we are already familiar with. Or just remain a bit more strict and look at typewriters. Word is a typewriter. People look at typewriters and sort of understand them after pushing one-two buttons. Yes, there are hidden gems and details and a long road from mechanical typewriters to Word and laser printers (e.g. ▶ this video ), but people are a lot more intuitive about these pieces of hardware and software, because they are simply updates on existing tech. Distributed systems is a new, and hitherto an explicitly unknown concept for many people. And with minikube you can set up k8s as easily as MS Office. (Or you can use Typhoon link .. ) And it's trivial to package up all this into a website, like Office 365 and GKE link . Or you can run it on your own PC with minikube and Virtualbox/KVM/qemu, and similarly you can install Office locally. But it does not make sense for one and it increasingly makes less for the other too.
As in, were they fast enough to be used with other layouts? Yeah, but this was back when letters were dictated- secretaries didn't go switching to dvorak. Any typewriter could technically use any layout, since you'd just have to swap out the characters. The biggest advantage of the selectric was that you could swap out the ball to get different characters or fonts. The ability to get italics was a pretty big deal. Here's Bill Hammond talking about them: ▶ this video
You may enjoy Bill Hammack's video "IBM Selectric Typewriter & its digital to analogue converter" ▶ this video