The Physics of the Blue LED (and the Nobel Prize Awarded for its Achievement)
Sixty Symbols explain the physics behind how the blue LED came into being – every time I see a high-brightness blue LED I give a momentary thought to how incredible it is that blue LEDs have only been a thing in our world for ~24 years (they’re so young!).
(For much longer viewing you can watch Shuji Nakamura give a 20+ minute presentation on Light for a Better World: A Celebration of U.S. Innovation – available here.)
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.