Malcolm II of Scotland was king of Scotland from 1005 to 1034. He was the son of Kenneth III, first cousin of the previous king Kenneth II, and grandfather of his successor Duncan I. Malcolm united the Kingdom of Strathclyde and merged with the Kingdom of the Alba forming modern Scotland.
... counters and light emitting diodes powered by a little generator embedded in the gyroscope.
The physics of this device looks confusing at first sight, but ...