Last quarter I decided that I needed a good universal counter for a few of the projects I had in mind for this summer. A universal counter contains a high quality time reference, which it uses to measure and count external events for you. The simplest example is to count frequency; the universal counter resets a counter, waits a second, and then saves the value counted up to. This count would be the number of cycles in one second, commonly refereed to as Hertz. There are numerous other function available on these, including measuring the period of a signal (which is the inverse of Hertz), measuring the interval between two events on different signals, or the ratio between two different frequencies.
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.
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