Problem with ultrasonic sensor HC-SR04

Replies

• 

  piyushh

  Not sure but still my suggestion is to go through the data sheet of the interfacing device and the micro controller thoroughly because:
  
  1. Trans-receiver/micro-controller you are using might have crystal oscillator frequencies incompatible
  2. Different IO trigger voltage levels.
  3. As I can see the module(Ultrasonic Ranging Module HC - SR04) you are using is TTL triggered input, so there can be some issues due to noise margin range
  
  There can be multiple reason for failure apart from the above but my advice is to please carefully analyse the timing diagrams of both the modules before actually implementing it
• 

  dossdss

  piyushh

  Not sure but still my suggestion is to go through the data sheet of the interfacing device and the micro controller thoroughly because:
  
  1. Trans-receiver/micro-controller you are using might have crystal oscillator frequencies incompatible
  2. Different IO trigger voltage levels.
  3. As I can see the module(Ultrasonic Ranging Module HC - SR04) you are using is TTL triggered input, so there can be some issues due to noise margin range
  
  There can be multiple reason for failure apart from the above but my advice is to please carefully analyse the timing diagrams of both the modules before actually implementing it

  
  thanks.
  i went through the datasheets... and i am trying to do accordingly. but i am not getting how to test that module at least once.
  as you said that there can be noise margin problem, so how can i find that and avoid it ?