dual pwm interference issue

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: October 28, 2013 at 12:54 AM / IP Logged

I'd think AM would not be a problem with a 1k trimpot (it's when you have 50k - 2M etc).

But who's replaced D1 with a resistor?

And what value is that resistor (in case it is the inline supply for the 555 & 358.

Usually PWM circuits only involve the 555, it is rare I see OpAmps (LM358) added.

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dual pwm interference issue

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