Tachometer

[Pmoshbr]

Somebody can help me!!!
I need a help to build a tachometer with PIC 16F877 using a CCP port, and a square wave frequency is what will determinate the RPM.
i am using th ccs pcwh as programmer.
 
SOrry about my english.:rolleyes: .. i'm a brazilian guy, so if the anwser be in portuguese i will prefer...
 
thanks
   Philip

[kcid]

Hello,

  You can use the Ext Int (rb0) and timer1 to catch the time between pulses, then you have the period for calculate the frequency or rpm.

  I’m by my English, I’m Ecuadorian.

[Faros]

Try this link from Microchip

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1999&ty=&dty=§ion=&NextRow=&ssUserText=tachometer

you find good app_notes on motor control in general, try AN894 in particlar

[ph_cabral]

Ola,

Philip, I am also of Brazil, please send me an email, and perhaps can help you because ja develop a Tachometer before, then I will post the code here too.

Excuse me, my English too

[Bugman]

look at:
        http://www.piclist.com/techref/microchip/tacho.htm

       

Posted on: April 12, 2008, 12:17:37 12:17 - Automerged
you can also get an interesting project at:
          http://homepages.nildram.co.uk/%7Estarbug/files/revcount.zip
hop it will help you.

[Kloswiski]

There is an example already in picc folder of your computer. please check out. it may not be exactly what you wanted but it'll give a kick start.