kdohertyon Hacker News • Recommends
On “Acoustic delay line memory (2014)”
There is also a fantastic video where Cliff Stoll describes the Friden EC-132 calculator and shows off its acoustic delay line here: link to this video
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#cliffstoll#fridenec-132#acousticdelayline
An astonishing old calculator - Numberphile
Numberphile
4.7M subscribers • 28 videos on Hallway
- Recommended by 1 person: 1 on Hacker News.
- Presented by Cliff Stoll
Beginner. No background in the topic needed.
793K views8 years ago1 recommendation
History and cultureHardwareRetro computingHistory of computingMemory management
Cliff Stoll demonstrates the Friden EC-132 electronic calculator, explaining its design and its use of acoustic delay line memory.
Cliff explains his passion for two Friden EC-132s. More links & stuff in full description below ↓↓↓ More Cliff videos: bit.ly/Cliff_Videos Calculator Unboxings: bit.ly/CalcUnbox Millionaire Machine: youtu.be/wwh0KH-ICCw Additional thanks to oldcalculatormuseum.com Read more about the machine at: oldcalculatormuseum.com/friden130.html Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. NUMBERPHILE Website: numberphile.com/ Numberphile on Facebook: facebook.com/numberphile Numberphile tweets: twitter.com/numberphile Subscribe: bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: patreon.com/numberphile Brady's videos subreddit: reddit.com/r/BradyHaran/ Brady's latest videos across all channels: bradyharanblog.com/ Sign up for (occasional) emails: eepurl.com/YdjL9Why it's here
1 person recommends thisWhat people say. Recommended as a fantastic explanation of early acoustic delay line memory and vintage electronic calculator design.
major505on Hacker News • Mentions
On “The Friden EC-130, one of the world's first electronic calculators”
Cool way to store the bits. I saw the other day a video about an old eletronic calculator that stores itens in memory usinglike a piano wire, and microfones, and small speakers, to make the cord vibrate, and store the value. It was the Friden ec-132 link to this video
db48xon Hacker News • Mentions
On “111,111.1 meters is reliably 1 degree of latitude”
There were a lot of delay–line memories back in the day. It wasn’t just that they didn’t have memory chips; memory chips hadn’t been invented yet. link to this video