SunriseLight VS ESC

Redshift has code to calculate that locally which I use in my sunrise light project

Since then I've made lots of things like audio amplifiers and effects, motor controllers, 3d printer controllers and firmware (and subsequently smoothieboard), muscle stimulators, bluetooth LED strip controllers, etc

Here's a bluetooth RGB strip controller I made a couple years ago if you want an example.

hackaday.com has a zillion links to examples; here's one two three four of mine and I've also got a laundry list of companies I've helped but whose technical details I can't legally publish (note that I've assisted many but not all of the companies in that link)

eg for this project my available inputs were intermittent 12v power, bluetooth, and the current time and location; and the desired output was 3× high current low-side switches that produced 12v RGB PWM corresponding to the colour temperature and brightness of the sky - so we need a bluetooth microcontroller, battery backup to keep time when 12v is absent, some battery management which wanted 5v in, a 12v buck to feed it, some MOSFETs, and redshift or similar code to plug into things.

Here's one I made earlier although it targets NRF52 and doesn't use Arduino libraries.

I've got a similar project here, and most of the complication is for battery management - the actual LED strip drive is even simpler than yours because I chose MOSFETs that work nicely with 3v3 gate voltage :P

If you're curious here's a couple of my AVR projects (not using Arduino libraries at all), and here's an NRF52 one

I guess my Sunrise Light project could have been built on Arduino's libraries since an NRF52 core exists, but I didn't do that…

For example, this old project of mine uses an NRF52832 (which is substantially similar to the '840, just missing USB) and it offers several services and characteristics including a battery level service, a DFU service, and a custom service for actually controlling it.

That's why I don't use them for anything fancy

hackaday.com has a zillion links to examples; here's one two three four of mine and I've also got a laundry list of companies I've helped but whose technical details I can't legally publish (note that I've assisted many but not all of the companies in that link)

See here and here for an example from my ESC project, or this example from Teacup

In this project for example, I use timer1 for dual channel 10-bit PWM at 7.8KHz for example, although I also have a system clock and a servo pulse reader hooked to it.

It is possible to get a timer to do multiple things at once if you work out how to set it up for overlapping use cases and then poke the registers yourself - eg in this project I use timer1 to 1) read a servo PWM signal, 2) generate two channels of motor drive PWM, and 3) keep a system clock

Sure, one of my first custom PCBs was a DC motor driver - album, github

If you're curious here's a couple of my AVR projects (not using Arduino libraries at all), and here's an NRF52 one

You can see an example of using timer input capture to read a servo PWM signal in this old project of mine

I've encountered plenty of folk that'd like to read a servo PWM signal and generate motor drive PWM at the same time in a less janky way than pulseIn (which blocks on no signal and is affected by interrupt latency) and analogWrite (which uses a super low PWM freq by default)

This ancient project of mine may give you some hints on interrupt-driven ADC readings, but it doesn't use free-running mode because I have multiple inputs to read.