Sound canceling headphones and an acrylic wafer held between the teeth with a wire connected to a 78rpm turn-table device creates sound from the grooves with a neodymium magnet by placing a steel needle on the disc. Sound is transmitted by wire, vibrating the acrylic wafer, allowing sound to spread through bone. To bring the device to the coil, variable electromagentic fields vibrate the magnet transmitting this elastic vibration as sound from the wire to the teeth to the bone and the eardrum. – translated from the original
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.