Wired reports on the science behind one of our most productive summer rituals:
“It’s just physics and chemistry, essentially,” says Dr. Steve Wang, head of dermatology at the Memorial Sloan Kettering Cancer Center in New York City. Ultraviolet radiation from the sun hits your skin at wavelengths ranging from 290 to 400 nanometers. This span includes both UVA and UVB radiation, though it’s the UVBs—with wavelengths ranging from 290 to 320 nanometers—that are the bigger threat.
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.