Pulse Width Modulation(PWM)

Thread Starter

micro

Joined Feb 10, 2006
26
Thanks, I have read the article called Pulse Width Modulation written by
By Michael Adler and Tim Surtell at http://www.eleinmec.com/article.asp?28. May I know the mean of "The motor will work perfectly well, provided that the frequency of the pulsed signal is set correctly, a suitable frequency being 30Hz."? How do I set the frequecy to be 30Hz and how do I know my frequency is at 30Hz after setting? Thanks for your kind help. :D
 

Papabravo

Joined Feb 24, 2006
14,393
Originally posted by micro@Apr 30 2006, 07:14 AM
Thanks, I have read the article called Pulse Width Modulation written by
By Michael Adler and Tim Surtell at http://www.eleinmec.com/article.asp?28. May I know the mean of "The motor will work perfectly well, provided that the frequency of the pulsed signal is set correctly, a suitable frequency being 30Hz."? How do I set the frequecy to be 30Hz and how do I know my frequency is at 30Hz after setting? Thanks for your kind help. :D
[post=16703]Quoted post[/post]​
I did not find the phrase you quoted in the article, but the frequency is adjusted with the 470 K Ohm variable reisitor connected to pin 7 of the first 555 timer chip. You can look at the 555 output on pin 3, with an oscilliscope or a frequency counter. I think if the frequency is anywhere close to 30 Hz. say 20-40Hz you will be just fine.
 
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