It by no means fails — we put up a considerably easy mission utilizing a microcontroller and somebody factors out that it may have been completed higher with a 555 timer or discrete transistors and even a few vacuum tubes. We welcome the critiques, after all; in spite of everything, considerate suggestions is the purpose of the remark part. Typically the anti-Arduino crowd has a degree, however as [Great Scott!] demonstrates with this microcontroller-less enhance converter, different instances it simply is smart to code your means out of an issue.
Constructed primarily as a comeback to naysayers on his authentic boost-converter circuit, which relied on an ATtiny85, [Great Scott!] needed to go to appreciable lengths to recreate what he did with ease utilizing a microcontroller. He began with a fast demo utilizing a MOSFET driver and a PWM sign from a operate generator, which does the job of boosting the voltage, however lacks the suggestions wanted to regulate for various masses.
Paradoxically counting on a block diagram for a business enhance controller chip, which might be the “proper” software for the job he put collectively the ultimate circuit from a largish handful of parts. Two op amps kind the oscillator, one other is used as a differential amp to watch the output voltage, and the final one is a used as a comparator to create the PWM sign to regulate the MOSFET. It really works, to make certain, however at the price of quite a lot of effort, expense, and perf board actual property. What’s worse, there’s no easy path to including performance, like there can be for a microcontroller-based design.
In fact there are circuits the place microcontrollers make no sense, however [Great Scott!] makes a very good case for enhance converters not being certainly one of them for those who insist on DIYing. Should you’re behind on the fundamentals of DC-DC converters, concern not — we’ve lined that earlier than.