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  1. R

    sonar object sensor/ buzzer ciruit design

    Wow! thank you! you are very expert. I appreciate all the guidance you gave me. best regards, Roonie
  2. R

    sonar object sensor/ buzzer ciruit design

    Thank you so much, Kris and Dave. You are most kind for getting back with me! My project is to design a sensor which sets off an alarm when an object is detected. I know about piezoelectric buzzers, but it musn't be too loud, and the sensor neds to be sonar instead of infrared, since it is for...
  3. R

    sonar object sensor/ buzzer ciruit design

    I don't know where to begin in designing the simplest possible circuit with a sensor and audible alert. Miniature. Thank you. Roonie
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