One wire controls LCD module

One wire controls LCD module

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Rex Niven @  edn.com has a design idea on how to drive a character LCD using only one wire.

This hardware interface Design Idea reduces the connection to just one wire, allowing a basic microcontroller with limited I/O to drive a large display, either directly, through a standard interface, or even an opto-isolator.

One wire controls LCD module – [Link]

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