Time Travel Tuesday #timetravel a look back at the Adafruit, maker, science, technology and engineering world
1865 – William Seward, US Secretary of State, declares the adoption of the Thirteenth Amendment, which prohibits slavery throughout the United States.
The Thirteenth Amendment (Amendment XIII) to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865. The amendment was ratified by the required number of states on December 6, 1865. On December 18, 1865, Secretary of State William H. Seward proclaimed its adoption. It was the first of the three Reconstruction Amendments adopted following the American Civil War.
During World War II, Armstrong turned his attention to investigations of continuous wave FM Doppler radar funded by government contracts. The relative slowness of FM radar, compared with the AM pulse radar then in use, was offset by an enormous increment in range that became increasingly important with the advent of aircraft capable of traveling at supersonic speeds. Although the War ended before this technology could be applied, it subsequently became the method of choice. The first clear test of its utility in extremely long-range target detection was carried out on January 10, 1946, when the Army Signal Corps’ Project Diana successfully reflected radar waves off the moon using a transmitter and receiver designed by Armstrong.
1892 – Pyotr Ilyich Tchaikovsky’s The Nutcracker premieres in Saint Petersburg, Russia.
Although the original production was not a success, the 20-minute suite that Tchaikovsky extracted from the ballet was. However, the complete Nutcracker has enjoyed enormous popularity since the late 1960s and is now performed by countless ballet companies, primarily during the Christmas season, especially in North America.Major American ballet companies generate around 40% of their annual ticket revenues from performances of The Nutcracker. The ballet’s score has been used in several film adaptations of Hoffmann’s story.
He is known for setting the first recognised automobile land speed record on December 18, 1898, in Achères, Yvelines, using a Jeantaud electric car. The record was set as part of a competition organised by the French automobile magazine La France Automobile. He completed a single flying 1 kilometre (0.62 mi) run in 57 seconds to give an average speed of 63.13 km/h (39.23 mph).
Lederberg remained at the University of Wisconsin for most of the 1950s. It was there that she discovered lambda phage, did early research on the relationship between transduction and lambda phage lysogeny, discovered the E. coli F fertility factor with Luigi Luca Cavalli-Sforza (eventually publishing with Joshua Lederberg), devised the first successful implementation of replica plating with Joshua Lederberg, and helped discover and understand the genetic mechanisms of specialized transduction. These contributions laid the foundation for much of the genetics work done in the latter half of the twentieth century.
We are angry, frustrated, and in pain because of the violence and murder of Black people by the police because of racism. We are in the fight AGAINST RACISM. George Floyd was murdered, his life stolen. The Adafruit teams have specific actions we’ve done, are doing, and will do together as a company and culture. We are asking the Adafruit community to get involved and share what you are doing. The Adafruit teams will not settle for a hash tag, a Tweet, or an icon change. We will work on real change, and that requires real action and real work together. That is what we will do each day, each month, each year – we will hold ourselves accountable and publish our collective efforts, partnerships, activism, donations, openly and publicly. Our blog and social media platforms will be utilized in actionable ways. Join us and the anti-racist efforts working to end police brutality, reform the criminal justice system, and dismantle the many other forms of systemic racism at work in this country, read more @ adafruit.com/blacklivesmatter
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.