Adafruit will not be shipping USPS orders Monday February 18, 2019 for the federal holiday, Presidents Day.
Expedited USPS orders placed after 11am ET Friday February 15 will go out Tuesday February 19.
In this video, we’ll demonstrate what a radio spectrum recording is and how it differs from legacy audio recordings of broadcasts. This particular recording was originally made using a HiFi VCR which recorded the IF from a communications receiver. Today, most spectrum recordings are made digitally using a software defined radio. This is one of the earliest spectrum recordings we’ve archived. The Software Defined Radio application used in this demo is HDSDR: http://www.hdsdr.de/
Early in the video you can hear a recording of Radio RSA – The Voice of South Africa from March 14, 1982.
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, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, 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.