The smart water controller for metro water supply lines described in this work makes use of a relay, an ultrasonic sensor, a flow sensor, a solenoid valve, GPS, and GSM. The planned system is intended ...

This Arduino code utilizes an ultrasonic sensor to measure distances. When an object is detected within a fix distance , the connected motors trigger a sequence: move backward, turn right, turn left, ...

For human health and environmental protection, the identification of heavy metal ions in seawater is of great importance. Here, we presented and demonstrated a surface plasmon resonance (SPR) sensor ...