Three cheers to YInMn blue and it’s awesome properties! From artnet news:
The pigment was discovered in 2009 by chemist Mas Subramanian and his team at Oregon State University while they were conducting experiments connected to electronics. For one series of tests, the scientists mixed black manganese oxide with a variety of chemicals and heated them to 2,000 degrees Fahrenheit. (The name comes from the pigment’s elemental makeup, which includes Yttrium, Indium and Manganese.)
In a serendipitous accident, one of the resulting samples turned a vivid shade of blue. Further testing found that the unique crystal structure of the resulting compound kept the color from fading, even when exposed to oil or water.
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.