AC VOLTMETER & FREQUENCY METER USING ARDUINO UNO BOARD

TO MAKE A DIGITAL FREQUENCY METER AND AC VOLTMETER USING ARDUINO ARDUIN O UNO BOARD (RANGE 0-200HZ APPROX.) APPROX.)

Presently I'm working on ubuntu 14.04, running proteus under virtualbox windows xp. This is the iruit diagram made in proteus. The omponents omponents used are listed on the le!t side o! the image. "ow lets move to the main portion o! the ode, that is how to program the arduino board to !untion as a #ero ross detetor and measure !re$ueny. !re$ueny. %e %e will use a sinusoidal input signal with &0# !re$ueny or you an hoose anything aording to your wish. (irst o! all, the loop)* heks i! analog input value is #ero, i! it is #ero, it starts a milliseond timer whih ounts milliseonds until the next #ero enountered i.e. hal! time period. +o !re$ueny 1-T h#. /ultiply by 1000 to get !re$ueny in #.

23 )one should be easy with basi  oding using 5627I" I23 hek httparduino.

examples* 8 by +5/ 56596T: 3;3T6I5; 3;3T6I5 ; 3"01&110?@ link !b.omsohamhakrabortyA !b.omsohamhakrabortyA 8

BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB 8 by +5/ 56596T: 3;3T6I5; 3;3T6I5 ; 3", 4 , @, -*F int analogInput G 0F !loat vout G 0.0F !loat vin G 0.0F !loat 61 G 100000.0F  resistane o! 61 )100* Bsee textH !loat 6- G 10000.0F  resistane o! 6- )10* B see textH !loat value G 0,nvalueG0F int pG0,ountG0,mG1,$G0F void setup)*   pin/ode)analogInput, I"P7T*F  ld.begin)1&, -*F   ld.print)JP565/3T36+J*F K void t)* timer in milliseonds    delay)1*F   pLLF K void loop)*    ountGG0F while)ountGG0*;P 5;7;5T3+ (63M73":   value G analog6ead)analogIn analog6ead)analogInput*FpG0F put*FpG0F i!)valueDG0.001* #ero ross detetion  t)*F value G analog6ead)analogInput*F analog6ead)analogInput*F   while)valueE0.001*  value G analog6ead)analogInput*F analog6ead)analogInput*F i!)valueDG0.001* alulates !re$ueny  ountG1000)-8p*F breakF K   else

  t)*F K

K K delay)pN*F  $G0FnvalueG0F  while)$GG0  whil e)$GG0** ;P  ;P 3+ T3 P35 P3 5 =;T5<3 =;T5<3 ( 5 %5=3(6/   value G analog6ead)analogInpu analog6ead)analogInput*Fdelay)1*F t*Fdelay)1*F i!)valueDG0.01* #ero ross detetion  delay)1*F !or)nvalueG0Fnva !or)nv alueG0FnvalueDGva lueDGvalueF* lueF* 3+ T3 I<3+T =5;73 ( I"P7T (6 P35    nvalueGvalueFdelay)1*F value G analog6ead)analogInput*F analog6ead)analogInput*F K $G1F   breakF K  K  value G analog6ead)analogInput*F  vout G )nvalue 8 >.0*  10-4.0F  see text, alulates input voltage  vin G vout  )6-)61L6-**F  8i! )vinD0.0?*   vinG0.0Fstatement to $uash undesired undesired reading H  K8  ld.setursor)0, 1*F  ld.print)J(GJ*F  ld.print)ount*F  ld.print)J =GJ*F  ld.print)vin*F K