The Quark D2000 comes with an on-board accelerometer, temperature sensor, Arduino Uno-compatible shield interface, and yes that’s a CR32 coin cell slot as this dev kit is rated to operate at a mere 2.0-3.3V. However some users are upset with the kit, specifically the 32KB of instruction flash; that said, Mouser stock is currently at 0 for a few days now, so the board is clearly liked by some at only $15.
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.
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