/diy/ - Do It Yourself

>>1555414
the zener regulator (or even a properly sized divider) will work. the problem is that they will waste a lot of power. you can use a discrete npn regulator to improve on this (pic) but a linear voltage regulator ic (intended for batteries) will be far more efficient. you didn't ask but switching regulators will be less efficient here unless they're a niche type that you can't buy as a cheap module.