This little circuit can be used for turbidity detection of low viscosity and low corrosive liquids, such as water in rivers and lakes. As seen in the schematic, the design is based on the AZDM01 ...

This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...