KAJIAN KINERJA KENDALI PWM PADA RANCANG BANGUN SISTEM EFISIENSI AIR WUDHU MENGGUNAKAN SENSOR INFRA-MERAH

The use of water for wudhu activities in general uses a manually tapped faucet so that water from the tank will come out. But performing wudhu in this way can result in waste of water in the reservoir. If the faucet continues to burn during the ablution process, there will be a time when water is not needed, that is when the process of washing the body part intended in ablution, so that at that time the water will be wasted. Another problem is if the supply of water sources is limited or in difficult terrain. Therefore it is necessary to make a tool that can improve the effectiveness of using ablution water using infrared sensor application that will activate the valve and open the tap water automatically only if there is a hand or body part detected by the sensor. The speed of the water being pumped will be further slowed by using the PWM (Pulse Width Modulation) method according to the water level of the tank that is detected by the ultrasonic sensor. The results of the study have been done sensitivity of ultrasonic sensors to the PWM control linearity error of 2.02%. And Data Test results of faucet ablation water wudhu adjustable infrared sensor can detect the object distance as far as 5-30 cm. If the input object is more than 30 cm, then the water does not come out.