PWM Generator

412

08:58:26

In this setup (i.e. no feedback), the Op-Amp acts like a comparator:  If the inverting voltage is greater than the non-inverting voltage, than the output voltage jumps to its minimum value; otherwise, the output is at its maximum voltage.

With a triangle/ramp input on the non-inverting input, we've created a square wave whose duty cycle can be adjusted with the potentiometer, which sets the voltage level at the inverting input.

At a high enough frequency, the human eye will percieve the LED as being dimmed instead of flickering.

published 10 years ago

DvT69

10 years ago

Bellissimo u.u

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