Designing step up converters

[Dajgoro]

Hi

For some recent projects I needed to raise the voltage from regular battery level voltages to voltages up to 50V for things like VFD displays, piezo buzzers, etc...
Since I did not require a regulated voltage, but rather just something in the area, I did not use a proper step up ic but rather I tried just having a oscillator, either astable circuit or mcu pwm source to drive the switching.
I would mostly rely on doing simulations in LT Spice and iterate on the design until I would get something that works well enough to be used.
I have a general understanding of how such circuits operate and how can certain factors affect their performance,
but I am looking for guidelines for designing such circuits in general so I have a better idea how to tune them to get more performance.

[Dajgoro]

Yes, I can get one, but my point is to try to learn how to do without one.

[Someone]

Yes, I can get one, but my point is to try to learn how to do without one.

The information is out there:
https://www.maximintegrated.com/en/app-notes/index.mvp/id/2031
You can make a practical/useful boost regulator with just 2 comparators, or one 555 once you can design analog circuits.

[Dajgoro]

Thanks!