![]() ![]() Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Read how this classic calculator was restored in the post here. It was based around the Texas Instruments TMS0805 IC, which could only store 320 words and was barely capable of four-function arithmetic – however, by sacrificing some speed and accuracy, Sinclair used clever algorithms to implement full scientific instructions. It is a 12-function, pocket-sized scientific calculator which initially retailed at £49.95, dramatically undercutting in price other calculators available at the time. The Sinclair Scientific pocket calculator was released in 1974 by Sinclair Radionics Ltd, following the release of the world’s first handheld scientific calculator, the HP-35, in 1972. I recently acquired a Sinclair Scientific calculator from 1974, alongside a large bundle of vintage computers – this was an unexpected (but very welcome) surprise and is in fact my first vintage calculator, though it is basically a pocket computer, so it is certainly in keeping with the rest of my collection. ![]() Adam’s Vintage Computer Restorations writes about restoring a 1974 Sinclair Scientific calculator.
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