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HP 5082-7356 display watch

A digital watch , which uses vintage , military grade HP 5082-7356 displays.

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Not long ago I stumbled upon a batch of vintage HP 5082-7356 displays. Those magnificent devices from the 80-ties , encased in glass - ceramic cases with built-in decoders deserved to be used again , so I built a watch with them.
The displays require a lot of power . Even when dark , the driver chip in each display consumes almost 0.5W . To keep with it the watch uses a LiFePo cell ( the size of AAA battery , housed in the round part of the watch ) and the high efficiency DC-DC converter. The heart of the watch is the STM32F051 MCU , used both as the RTC and as the display controller.
The case of the watch was milled from the block of aluminum and then anodized black .
The video of the completed watch can be found here :
https://www.youtube.com/watch?v=GPfjgoj_oyM

watch_src.tgz

Watch firmware source

x-compressed-tar - 5.92 kB - 05/20/2017 at 20:16

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watch.bin

Watch firmware

octet-stream - 2.98 kB - 05/20/2017 at 20:13

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watch.zip

GERBER files of the watch PCB

Zip Archive - 37.40 kB - 05/20/2017 at 20:12

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watch_schem.pdf

Schematics of the watch

* - 18.03 kB - 05/20/2017 at 20:11

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