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Recent content by garg29

  1. G

    PIC16F Internal Opamp

    some useful replies please......
  2. G

    PIC16F Internal Opamp

    FVRRDY is not settable & is always ‘1’ (Note 1) CDAFVR<1:0> is for Comparator and DAC
  3. G

    PIC16F Internal Opamp

    FVRCON = 0b10000011
  4. G

    PIC16F Internal Opamp

    yes I have disabled ADC & all Comparators. is working but voltages are not proper
  5. G

    PIC16F Internal Opamp

    one more thing I have initialized TRISA = 0b00110000;
  6. G

    PIC16F Internal Opamp

    Friends, I am trying to use PIC16F1789 uC's internal Opamp as Differential amplifier. I want to measure 0 to 100 Ohms resistance. I have converted this resistance to 17.8mV to 33.9mV using simple wheatstone brdige. I have tried making differential amplifier using 1Mohm & 39Kohm resistors pair...
  7. G

    Interrupts jumps on rpm measure

    Dear All, I am measuring 2 rpms through INT0 and INT1 both simultaneously. But i am getting lot of jumps in rpm value .:sad: Please help me out .
  8. G

    frequency & Amplitude measurement

    Thanks a lot. You seem to have good technical knowledge. :-) . a guess from your name i think you may be from India... Happy Holi. Why do you suggest PIC24/30/33F or MSP430.... any particular reason....I'm using PIC16/18 series Can you share your mobile no. with me I'll call you...
  9. G

    frequency & Amplitude measurement

    Thats fine but there are lots of issues in that method, like accuracy, temperature deviation, linearity, noises etc. I was thinking if there was a dedicated chip for this job (i think there must be a one). Anyway still Thanks a lot for your reply & efforts.
  10. G

    frequency & Amplitude measurement

    I want to measure Frequency & Amplitude of a Triangular/Square/Sine-wave. Is there any dedicated IC for this, which may give digital or voltage output proportional to the above parameters. Regards.
  11. G

    Pic46k22 hangs on interrupt

    Have disabled WDT in conffiguration settings... wdt is not playing any role..if i enable wdt it will reset the whole screen again..i cant reset the whole screen...want the pic not to hang at all while running
  12. G

    Pic46k22 hangs on interrupt

    Dear all, I have developed a code for measuring time diffrence between two pulses from C.T. I have used int0 and int1 interuupts for zero crossing detection.When interrupt on int0 occures the timer starts and when interrupt on int1 occurs ,the timer stops and then the value of time diffrence...
  13. G

    running pic18f46k22 at 20 mhz pll x4

    Thanks once again for replying. Regards
  14. G

    running pic18f46k22 at 20 mhz pll x4

    thanks keith for replying. As i said I know that the maximum allowed frequency is 64MHz but when I'm putting 20Mhz with 4x PLL the system is running very fast , I just want to know is it at 64Mhz or any other arbitrary frequency. (actually I'm not having 16Mhz xtal and my supplier also doesn't...
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    running pic18f46k22 at 20 mhz pll x4

    Hi, I'm running a project on PIC18F46k22 with 20Mhz Quartz crystal, In configuration I have selected : 1. HS Oscillator (high power > 16Mhz) 2. Oscillator 4X PLL Enable - Oscillator multiplied by 4 Is now the system running at 20 x 4 = 80Mhz or is it at its maximum frequency 64 MHz (as...
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