Sinclair Black Watch

Specifications

Cpu

Single custom timer/display-driver IC with a quartz crystal oscillator and trimmer capacitor (no general-purpose microprocessor)

Battery

Single button cell, rated for about a year but in practice often failed within days to weeks due to design and manufacturing defects

Display

Red LED 7-segment display, illuminated only when the case is pressed or tapped to save battery

Storage

base: n/a: fixed-function digital watch logic, no user data storage · options:

Release Price

£18 (kit form) / £25 (assembled)

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