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#fridencalculator#delay-linememory#torsionalmemory

Friden Calculator (extra footage)

Numberphile2

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  • Recommended by 2 people: 2 in engineering communities.
  • A classic. People kept recommending it from 2017 to 2022.

Beginner. No background in the topic needed.

62K views8 years ago2 recommendations

HardwareHistory and cultureRetro computingElectronics

An explanation of how the Friden calculator uses torsional delay-line memory to store data using a coil of wire.

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Why it's here

2 people recommend this

What people say. Recommended for its explanation of early acoustic and torsional delay-line memory storage techniques.

Moments people linked to

u/gomtuu123in r/programming • Recommends

On “Harder Drive: Hard drives we didn't want or need”

Haven't watched the whole video yet, but the first part reminded me of a Numberphile video about an early electronic calculator that used acoustic memory. It stored data in a coil of piano wire by sending pings (or, I guess, torsional waves) through it.
39View on Reddit

u/ocusin r/programming • Recommends

On “The really interesting bit is its use of acoustic memory for temporary storage”

You should watch the [extra footage where he says it's not really acoustic memory but rather a torsional one].
7View on Reddit