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Re: PWM Circuit explanation

 by fivenine ¦  Mon Nov 13, 2017 9:58 am ¦  Forum: Arduino ¦  Topic: PWM Circuit explanation ¦  Replies: 6 ¦  Views: 976

Thank you for the in dept explanation. Its given me a lot to read over and understand.

I'm still trying to grasp how PWM controls the intensity of the lamp. In the code, a range from 0 to 255 is provided from pin 3 of the Arduino, how is this translated back to an AC value to control the brightness?

Re: PWM Circuit explanation

 by fivenine ¦  Sun Nov 12, 2017 10:18 am ¦  Forum: Arduino ¦  Topic: PWM Circuit explanation ¦  Replies: 6 ¦  Views: 976

The 33k and 22k resistors will run warm - make sure you choose them appropriately. I'd also go for a higher voltage bulk cap (C2). Can I ask how you go about determining this. What calculations are involved? If you are just doing this for a school project, I would power it from a low voltage (12 or...

PWM Circuit explanation

 by fivenine ¦  Tue Nov 07, 2017 5:49 pm ¦  Forum: Arduino ¦  Topic: PWM Circuit explanation ¦  Replies: 6 ¦  Views: 976

If someone could please provide me a little explanation on the workings of this circuit and how these components are used to integrate with the code. I have this code and project I want to implement for school but to be honest I lack a bit of knowledge on it and would like to understand it first ins...