Sinclair Radionics Black Watch
The Black Watch is a digital LED wristwatch from Sinclair Radionics Ltd.
It has an all-plastic housing with a clipped-on plastic base and a four-digit seven-segment display with red LED digits, which is covered by a blue sight glass. The date and time are displayed, the buttons for this being hidden under the central area and acting as sensor buttons.
The clock came on the market in 1975 and was sold both as a kit and as a fully assembled clock. The clock electronics consist of the then innovative integrated injection logic (I2L), which was comparatively energy-saving and could be operated with an operating voltage of 1 V from a battery.
Web links
Individual evidence
- ↑ 1999 Computer Entrepreneur Award Recipient Sir Clive Sinclair. IEEE Computer Society Awards, accessed March 29, 2014 .