Resumen
Water is needed for life to various activities such as drinking, cooking, washing, bathing and other activities. Humans use water from various water sources, one of which supplied water from the taps, in other words, anyone who uses the water will have to pay according to how large the volume of water used. But in some cases when using the water from the faucet taps people forget to turn off the water faucet so that the water continues to flow and cause wastage of water so the waters rising bills. A simulation of an automatic faucet on the tub has been made. The designed system consists of hardware and software, hardware comprises 16 ATMega microcontrollers, capacitive sensor model, driver solenoid valves and solenoid valves 12 volts, while the software used is the programming language C. This system can work if the capacitive sensors detect altitude presence of water in the tub water level has exceeded the threshold that is set near the sensor. The capacitive sensor will send a signal to the microcontroller, and the microcontroller will mengatifkan driver solenoid valves, solenoid valves after the driver gets instructions for shaking Faucet solenoid mounted on the tub. Simulation of an automatic faucet in the tub is already working well to drive the solenoid valve automatically if the water level exceeds the lower limit or upper limit detected by the capacitive sensor solenoid valve will open and close.Keywords: Sensor Kapasitif, Microcontroller atmega 16