8pcs HC-SR04 Ultrasonic Sensor Module 3-5V with 4pcs Mounting Bracket Distance Sensor + 2pcs 20CM 10P Male to Female Dupont Wire for Arduino R3 MEGA2560 Duemilanove Nano Robot XBee ZigBee

Working voltage: DC 5V; Working current: 2.2mA; Working temperature: 0~+70°; Output mode: GPIO; Sensing angle: less than 15 degrees; Detection distance: 2cm-400cm; Detection accuracy: 0.3cm+1%; Size: 1.73*0.79*0.58" (44mm*20mm*14.8mm); Weight: 0.25 ounces (7g)
Working principle: 1. Use IO to trigger the distance measurement, and give a high-level signal of at least 10us; 2. The module automatically sends 8 10khz square waves and automatically detects whether there is a signal return; 3. If there is a signal return, a high level is output through IO. The duration of the high level is the time from the ultrasonic wave from emission to return. Test distance = (high level time * sound speed (340M/S))/2
How to use: send a high level of more than 10us from a control port, and then wait for the high level output at the receiving port. Once there is an output, you can start the timer. When this port becomes a low level, you can read the timer value. This is the time of this distance measurement, and then you can calculate the distance. By continuously testing in this way, you can reach the value of your mobile measurement
Compatible with Arduino R3 MEGA2560 Duemilanove Nano Robot XBee ZigBee etc
Package included:8pcs HC-SR04 Ultrasonic Sensor Module, 4pcs Mounting Bracket Distance Sensor, 2pcs 20CM 10P Male to Female Dupont Wire, 8pcs Screws

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