Hi, I'm working on a hobby project and wants to make it 5V as well as 3.3V compatible. It has an Atmega328 Pand HC05 bluetooth module. What I want is the device to work whether I provide 5V or 3.3V. 3.3V or 5V doesn't matter for the MCU but for HC05 it does as it works at 3.3V. So I'm looking for a…

Full pass voltage regulator at undervoltage

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