This watch uses a liquid crystal display. The circuit is from the 80s and the module used is uncommon nowadays. Power is provided by a single cell.
April 2017 - The new Alps UGMZ2AA Bluetooth communication modules can be found on Mouser...
Texas Instruments TMP116 and TMP116N digital temperature sensors can be obtained from Mouser...
This circuit was obtained in an old Linear Technology documentation by applying to the monitoring of...