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.
Here’s how it works. The wheel was created from titanium powder and a type of 3D printing called electron beam melting. An electron beam generates heat, which is used to form the powder into metal structures in a vacuum. Titanium likes to react with oxygen, so the vacuum bit is especially important. This technology can make more than wheels — it’s being investigated for use in medical-implant and aerospace manufacturing, as well.
HRE and GE Additive created the wheel in five distinct sections comprising the face of the wheel. Those five pieces were combined with a custom center section, all of which was eventually bolted to a carbon-fiber wheel rim using titanium fasteners. Some machining is still required, since its precision is unmatched and components like bolt holes need to be engineered to perfection.
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.