1pcs Ultra Module -sr04 Sr04 4pin Distance Measuring Transducer Sensor

Description\/Features: Stable performance and precise distance measurementHigh precision module, blind spot (2cm) ultra closeWiring methods, VCC, trig (control end), (receiver end), GNDUsage: If a control port sends a high level of 10US or more, you can wait for the high level output at the receiving port. Once there is an output, you can start the timer timer. When this port becomes low, you can read the value of the timer. This is the time for this distance measurement, and then the distance can be calculated. This continuous cycle measurement can reach the value of your mobile measurementModule working principle: (1) Using IO triggered ranging to provide a high-level signal of at least 10us; (2) The module automatically sends 8 40kHz square waves and detects whether there is a signal return; (3) There is a signal return, and a high level is output through IO. The duration of the high level is the time from the emission to the return of the ultra wave. Test distance=(High level time x Sound speed (340M\/S))\/2; Specifications: Type: B--SR04 SR04 4PinOperating voltage: DC5VQuiescent current: less than 2mALevel output: high 5VLevel output: bottom 0VSensing angle: no more than 15 degreesDetection distance: 2cm-450cmHigh precision: up to 0.3cmDue to different batches, there may be differences in product appearance and printed text, which will not affect use.Material: PCBcolour: As ShownPackage Contents: 1 x moduleOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.