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  1. S

    please help me with this circuit

    the shown diagram i have used as current to voltage converter in the case of photodiode. pin 1 corresponds to cathode of photodiode and pin 2 corresponds to anode which is grounded. i am using INA128... please help me about the working how the current is converted to voltage in this case...
  2. S

    PIC16f73 ADC problem- ADC does not work for values below 0.5

    Re: PIC16f73 ADC problem this is the code i m using..
  3. S

    PIC16f73 ADC problem- ADC does not work for values below 0.5

    PIC16f73 ADC problem my ADC is not working for values below 0.5.. it is showing 0V upto 0.5V and after that suppose for 2.2 volts it is showing 1.7 volts.. whst is the problem.. please help me.. thnx in advance...
  4. S

    What is the function of pull up capacitor?

    can there be anything such as capacitor pull up like wise of resistor pull up???? and if yes then what is its function???/// please reply.. thnx...
  5. S

    voltage division - can we divide an AC with a DC signal?

    voltage division can we divide an AC signal with a DC signal... if yes then what is the way to do it.. please reply soon..
  6. S

    current measurement of whole circuit - need help

    current measurement hi.. i am using a transformer which generates ±15V and +5V using 7815,7915 and 7805. this supply is used to drive my circuit which consists of 6 quad opamp IC's and other passive components... everything is build up on PCB.. now i want to measure current of whole circuit...
  7. S

    9-0-9 500mA - my transformer heats up tremendously

    Re: transformer heating my 7805 is connected to the transformer doesnt heat up... but there is one thing which i have used is i m using two different transformers of different ratings which gets supply from same mains point... can that be a problem???????
  8. S

    9-0-9 500mA - my transformer heats up tremendously

    transformer heating i checked it but at this time transformer doesnt heat... i have given this supply to 7805 and then to pic micro controller.. please tell me the problem.. help me urgently...
  9. S

    9-0-9 500mA - my transformer heats up tremendously

    my transformer is heating i am using a 9-0-9 500mA transformer which drives my pic 16f73 and a LCD 16*2 attached to it. when i switch on the power within 5 min my transformer heats up tremendously.. i am not able to understand the problem.. please help me soon.. its urgent.. i m stuck at this...
  10. S

    interfacing analog and digital circuitary

    i Have used one supply cord and two separate transformers for two circuits.....
  11. S

    problem with LCD - analog and µc boards work separately only

    Re: problem with LCD i got the solution.. now i have used the ground pin of three pin power plug connector as ground of all the circuit.. and the circuit starts working... how important is the use of tht three pin plug ground in all the applications? please let me know thnks to cameo_2007 and...
  12. S

    problem with LCD - analog and µc boards work separately only

    Re: problem with LCD it seems problem of ground as i am using two transformers. actually 1 transformer is used for generation of ±15V and other one is used for 5V generation which is used for µC board. tranformer used in ±15V generation is center tapped while other one is not used in center tap...
  13. S

    problem with LCD - analog and µc boards work separately only

    problem with LCD hi.. i am using analog and µc board separately. i am giving my analog inputs to ADC of µc. µc is interfaced with a LCD display. Power supply to both boards is from different sources(transformers). when i use both boards independently they work. as soon as i connect both boards...
  14. S

    interfacing analog and digital circuitary

    i am using two analog inputs from one board which is given to a pic µc board... µc board is interfaced with a LCD.. my problem is when i am switching on the supply of analog board my µc board gets a minimal supply which switches on my power LED... and LCD's backlight partially on... then when i...

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