Thanks for sticking with me. I'm not the sharpest tool in the shed but I'm willing to work hard.
What is x(t)?What is X(w)?
What are the red arrows? Are they trying to keep up with the PWM signal?
What are the name of these graphs?
Is the Fourier Series illustration highlighting the different frequencies that comprise a fundamental frequency at a specific period in time?
What is the process for selecting the resistor and capacitor? I'm thinking I start with a resistor that doesn't overdrive the PWM pin (at 490Hz the capacitor will have a very low capacitive reactance). I then start 'playing' with different capacitor values that give good responsiveness and nominal ripple?
A nice tutorial when one wants to convert a PWM into a voltage:http://henrysbench.capnfatz.com/henrys-bench/arduino-projects-tips-and-more/arduino-lm358-op-amp-pwm-to-voltage-converter/
Hi GangWell I printed out the thread today and read it thoroughly. I was hoping that it would clarify things however it's raised more questions.
The frequency domain theories are fantastic for analysing waveforms, and for designing/building devices to produce waveforms or modify waveforms etc.
But the measured voltage waveform at the PWM pin of an arduino is not the result of a bunch of sinusoidal signals putting on a display for you.
There is a distinction. There is a difference.
Hi GangSorry for taking so long to respond. I'm planning on using an ATtiny25 for this project so I'm not exactly sure how to increase the PWM frequency?I stumbled across another video in the interim that I found quite useful.Electricity - FiltersCheersJase
Hi GangThanks for the replies. Registers make me break out in a cold sweat. They remind me of crack codes for games. A combination of letters and numbers that make no sense whatsoever but when applied in the correct sequence do something magic.CheersJase
They shouldn't. Registers are just variables that affect the microcontrollers hardware. There is an extensive amount of documentation in the datasheet about the identities and effects of all of the peripheral registers.
But... they interact. So you have to be familiar with all the possible interactions to avoid difficulties.