Water Level Sensor with Arduino What are the types of water level sensors? There are six basic types of commercially used water level indicators: Resistive, Capacitive, Ultrasonic, Frequency, Guided ...

The wiring in the diagram shows the ultrasonic sensor's trigger and echo pins connected to pins 8 and 9 respectively. Two push buttons are used: one for calibration (setting the maximum water level) ...

Abstract: We connected $\mathbf {p H}$ sensor and solar cell into Arduino Board to control data transmission via red laser communication or popular known as visible light communication (VLC). The ...