Products tagged with 'ultrasonic'
Ultrasonic sensor automatically sends eight 40khz square wave and automatically detect whether there is returning pulse signal. If there is signal returning, output will be high.
The HC-SR04 ultrasonic sensor uses sonar to determine distance to objects like bats or dolphins do. This module offers excellent range accuracy and stable readings in an easy-to-use package. Its operation is not affected by sunlight or black material (although acoustically soft materials like cloth can be difficult to detect). Ranging accuracy can reach to 3mm.
Using IO port TRIG, send high level signal of at least 10us. Module automatically sends 8 40KHz square waves, automatically detecting whether a signal returns. If a signal return, a high level is output through the IO port ECHO.