Inside [Klaus]’ device is an Arduino Uno, an HC-SR04 ultrasonic distance sensor, and an Adafruit Wave Shield. Originally, this parking/distance sensor used a small TFT to display the distance to ...

[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.

High Precision: Conamara’s flat frequency response throughout the ultrasonic range enables accurate ranging and proximity detection. Compact and Energy-Efficient: At 5mm ⌀ and 1.5mm thick ...