Pages: [1]   Go Down
Author Topic: PWM Controller  (Read 1133 times)
0 Members and 1 Guest are viewing this topic.
0
Offline Offline
Jr. Member
**
Karma: 1
Posts: 64
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

G'day,
Using a DF-Robot motor shield to drive a hard disk voice coil, but it whistles when anything other than 100% PWM is applied.
Have played around with a bit of capacitor filtering, with marginal improvements.
Can anyone suggest a PWM controller chip I could use, that has a higher frequency than the PWM O/P of the arduino.
Have read a few posts about changing the frequency, but would rather buy a an purpose IC that can do the job.
Did an google and found SG3526 etc, but would be nice if someone had used a similar device already.
Tks
Logged

0
Offline Offline
Jr. Member
**
Karma: 1
Posts: 64
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

G'day
Found my answer that allows the PWM freq to be 100kHz
[urlhttp://arduino.cc/forum/index.php/topic,10537.msg82720.html#msg82720][/url]
Logged

Pages: [1]   Go Up
Jump to: