[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors.

decided to build his own speaking distance sensor (.de, Google Translation). Inside [Klaus]’ device is an Arduino Uno, an HC-SR04 ultrasonic distance sensor, and an Adafruit Wave Shield.

Arduino’s new Plug and Make Kit continues in this ... a buzzer, and sensors covering temperature and humidity, distance, and a gyroscope. These components, along with everything else included ...