Researchers in Grenoble have had an original idea: to prevent a Wi-Fi network from being hacked, with a wallpaper insulation, which no longer allows waves to leave the apartment. Other utilities may be found in such technology, such as protection of sensitive individuals to electromagnetism.
The article (translated) says the wallpaper is designed to allow phone frequencies in and out.
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.