The first commercially produced continuous-strip photographic film was manufactured on March 26, 1885 by the Eastman Dry-Plate and Film Company in Rochester, NY. George Eastman had received his patent in 1884 intending roll-style film to replace bulky, inconvenient glass-plate photography that had preceded it.
Nathaniel Bowditch, born in Salem Massachusetts, some 150 years after the witch trials spread fear and superstition across his otherwise reputable town, was known for early innovation in mapmaking in the colonial United States as well as the first insurance actuary as president of the Essex Fire and Marine Insurance Company in Salem.
In a letter written to a friend dated March 30, 1759, Giovanni Arduino first proposed stratigraphic chronology via a geological classification system that divided formations into four categories: the Primitive, Secondary, Tertiary and Volcanic or Quaternary. Aspects of this classification system are still in use today. But clearly the important aspect of Giovanni Arduino is the fact that he shares his last name with a certain single-board microcontroller. Coincidence? Of course not!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. 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 code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.