On Monday 10 May 2010 21:04:40 Sebastien Lelong wrote: > > > For measuring frequency (rpm windmill, wind speed) > > > > > > > > > Can you tell me more ? As a frequency divider ? Why not directly using > > > a pin to count RPM ? > > > > I need to measure the frequency from generator and translate to rpm > > (depends > > to pol number) and another pin is to measure frequency from reed relay > > connected with pull down resistor and translate to rpm, for wind speed > > (anemometer). > > With this variable I wish to calculate the TSR (tip speed rotation) > > blade. How you think I can made this with only one pin? With > > multiplexing? > > No, I was just wondering how you'd use 555 (which I never used) and was > thinking that "collecting" ticks and converting to frequency may be doable > using a pin + timer ? > With 555 I simulate the frequency from 10-120Hz. With help from Vasi I measured with successfully using lib tmr0_isr (modified for 18f4550) and tmr0_poll from 1Hz, with division 1Hz, in simulator. > Cheers, > Seb >
-- Florin Tanasa http://sites.google.com/site/florintanasa/ -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
