Buruan dibeli gan....barang murah-berkualitas SIAPA CEPAT DIA DAPAT Upgraded single Chip CS100A Sensor Ultrasonik HC SR04 - Sensor jarak SR-04 working voltage of 3v-5.5v Spesifikasi : Operating Voltage : 5 V Operating Current : 15mA Operating Frequency : 40KHz Measuring Range : 2 cm - 400 cm Measuring Angle : 15 degrees Interface: 1. VCC positif 5V DC 2. Trig bagian pengendali 3. Echo bagian penerima 4. Gnd ground contoh pemakaian + sketch arduino https://goo.gl/wdbEWm