SMRTR Science & EngineeringJun 30, 2026TechEBlog

Woven Rings Hold Data in This Hand-Built Magnetic Memory Module

SMRTR summary

Frustrated by rising memory prices, a maker named Polymatt built a functioning magnetic core memory module using techniques from the 1960s. The device uses 64 tiny ferrite rings, each storing one bit of data by holding a magnetic field in one direction, giving it 8 characters of total storage. It connects via USB and retains data without any power, proving that old-school magnetic memory still works today.

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