A flawed genius. Had some great ideas that were never quite practical. I recall the first (LED) calculator, you needed to replace batteries at very short intervals, same with the watch. It still made him a millionaire.

Reminds me of Lawrie Bond of Bond three wheeler cars (NOT the Bond Bug - that was a Reliant). He may have been the inventor of the roof box and jet ski.

I must have donated some £600+ to the Sinclair brand - 3 Sinclair computers over a period of 5/6 years. The 3 boys then went on to gaming machines Sega, Nintendo .... the machines were more expensive and the slot in games even more so. They were infinitely better and almost guaranteed the game would load in a few seconds compared the Sinclair and tape recorder marriage.

It was carrot & stick approach to child rearing - very few arguments with their behaviour / attitude to schoolwork etc etc over the years but mostly carrots, in the form of computers & bikes, handed out for doing well at school.