Here's are some images and sound files of a simple PWM LED dimmer I built with a 555 timer.
https://sdrv.ms/WuYgiN
When the pulsewidth is nice and even (most synths I've used call that 50%) the waveform is centered along the center line just fine but when I adjust the pulsewidth up and down it either goes way above or below the line.
Questions?
Is this what DC Offset is?
Is there an easy way to fix this?
It works very well for dimming LEDs smoothly but for use as a sound generator it's not what I would like.
The circuit design comes from Dave Jones as you can see from the image of the yellow sticky note.
also... the .wav named PWM 104cap with FX was run through all kinds of effects so it's not a good example of what I'm talking about. I put it there just for fun
https://sdrv.ms/WuYgiN
When the pulsewidth is nice and even (most synths I've used call that 50%) the waveform is centered along the center line just fine but when I adjust the pulsewidth up and down it either goes way above or below the line.
Questions?
Is this what DC Offset is?
Is there an easy way to fix this?
It works very well for dimming LEDs smoothly but for use as a sound generator it's not what I would like.
The circuit design comes from Dave Jones as you can see from the image of the yellow sticky note.
also... the .wav named PWM 104cap with FX was run through all kinds of effects so it's not a good example of what I'm talking about. I put it there just for fun