First Atomic Clock Wristwatch – The Hewlett Packard 5071A

First Atomic Clock Wristwatch – The Hewlett Packard 5071A 🙂

The watch keeps time to a few nanoseconds per day. The attractive display is based on 7-segment red LED technology. Batteries are included (they last about 45 minutes but are rechargeable). AC adapter included. There are no adjustments for daylight saving time; however the clock does handle leap seconds and keeps track of the [Modified Julian] date. This HP wristwatch includes 5/10 MHz and 1 PPS outputs. An internal keypad is used to set the date and time. Not waterproof nor even water resistant. High-performance models available

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1 Comment

  1. A more practical version could be built based on the chip scale atomic clock [1] or a GPS-aided crystal oscillator.

    [1] http://www.microsemi.com/products/timing-synchronization-systems/embedded-timing-solutions/components/sa-45s-chip-scale-atomic-clock

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