11 June 2025

Sinclair Oxford 300 calculator


 A throwback to some of my earliest teaching days when students had the Sinclair Oxford 300 calculator (1976). We still have one that works, with its red LED. I had a Casio LED calculator which is still functioning with all its features.

No comments:

Post a Comment

Why Internal Resistance Confuses Everyone (And How to Actually Understand It)

  Why Internal Resistance Confuses Everyone (And How to Actually Understand It) “Your battery says 9V… so why does your circuit only get 7.8...