Diff of LED - Riquartz

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#author("2023-07-13T16:00:19+01:00","default:admin","admin")
#author("2023-07-13T16:33:22+01:00","default:admin","admin")
Light Emitting Diode. High battery use meant time displayed on demand when button pressed. The precursor to LCD.

*References [#cc517ea6]
-[[870001]]
-[[870002]]
-[[870003]]
-[[870004]]