Being able to measure ducted airflow cheaply and non-intrusively, like with this ultrasonic ... into a functional sensor. [ItMightBeWorse] is using readily available HC-SR04 sensor boards and ...

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 ...

The proposed model demonstrates real-world effectiveness in reducing fuel consumption, labor costs, and emissions by ...