How to build an USB real-time clock

Alexander Holler writes: [ via ] This page describes how you can use a small AVR device and a real-time clock (RTC) to build a hot-pluggable USB real-time clock (I’ve named it just usb-rtc), mainly for usage with ultra-low-cost hardware meant to be used with Linux. The overall cost for one of those thingies I’m describing here is about 15€-20€, which isn’t really cheap.

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