Description: Adopts IO port for at least 10us high level signal. It can send eight 40khz square wave automatically, and detect if there is any signal returned. If the signal returning, output one high level signal via IO port. The duration of the high level signal is the time from sending to returning. Measuring distance=duration of high level x sound velocity(340m/s)/2 Wide voltage operation: 3v-5.5v, sensing distance 5v: 2-450m; 3.3v: 2-400m Specification: Mode: HC-SR04P module Working voltage : DC 3V-5.5V Static current: Less than 2mA Output signal: Electric frequency signal, high level 5V, low level 0V Sensor angle: No more than 15 degrees Detection distance: 2cm~450cm High precision: Up to 0.3cm signal : output TTL PWL signal Mode of connection: VCC; trig(T); (R); GND Package Includes: 1 Piece Distance Measuring Module Note: The output can be started by the timer. When this port becom