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.
Scientists Generate Electricity from a Silk Moth Cocoon
Scientists in India have found a way to not only harvest the trace amounts of minerals found on silk moth cocoons, but according to a scientific report published by them earlier this month, they have found a way to generate enough electricity using these minerals plus some water to power electronics. From Inhabitat:
Wetting the cocoon makes the trace elements in a silk moth cocoon form mobile charge-carrying ions, producing an electric current across the cocoon membrane. The researchers used this current to light an LED. They attached an aluminum electrode to the inner surface of a cocoon and a copper electrode to the outer surface, and exposed the cocoon to water vapor. Three such cocoons were connected in series to light an LED. The researchers also charged a moist silk cocoon with a direct current source to see if it was capable of acting as a capacitor — a device that stores charge. The study shows that it could power an LED for two to three minutes after the direct current was removed.
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.