circuit not functioning

Discussion in 'The Projects Forum' started by haran, May 28, 2008.

  1. haran

    Thread Starter Active Member

    Apr 6, 2008
    42
    0
    im doing an ultrasonic range meter from this website http://www.hobby-elec.org/e_pic6_6.htm. after finishing the circuit it seems to output is only 0.26 at its seven segment display no matter what i do. i did a pcb board but it seems that ther is no problem with it..but the ultrasonic transcuders im using dont send or receive signals..any ideas what i can do?:(
     
  2. haran

    Thread Starter Active Member

    Apr 6, 2008
    42
    0
    the title is circuit not functioning
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Do you have any test equipment? You will need to go through the circuit stage-by-stage to find the problem. Do you assemble it as a kit?
     
  4. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    144
    I have corrected it for you.

    Dave
     
  5. haran

    Thread Starter Active Member

    Apr 6, 2008
    42
    0
    i took the circuit information from the above website . I have a logic analyzer, oscilloscope, fuction generator and a digital multimeter.
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Did you happen to get the transducers swapped around?

    They look nearly identical - except for the part numbers.

    Did you read through the theory of operation, and the list of modifications? I don't know if all of the modifications were implemented.
     
  7. haran

    Thread Starter Active Member

    Apr 6, 2008
    42
    0
    yes i have rechecked the transducers and made sure that im using a pair of transmitter and receiver. most of the modification that were stated was implemented.
    il check it again
     
  8. haran

    Thread Starter Active Member

    Apr 6, 2008
    42
    0
    it seems that all the modification stated has been made
     
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