I'm looking for a waveform to drive the brightness of leds so the appearance is that the device with the leds is "waking up". I've done a lot of searching and run off on a lot of unproductive tangents. I have to think that many before me have used creative waveforms in a variety of projects. Any ideas on what to search on ?
I'm thinking of a waveform that has a steep, probably linear rise to get to max brightness and then some sort of rolloff or decay as the brightness diminishes.
This is for a Stars wars like light saber that I have built, programmed and is complete except for this part. I would like for it to "wake up" as a prelude to the light show.