![3.3V and 5V Power Rail circuit - Does this reverse voltage protection work? - Project Guidance - Arduino Forum 3.3V and 5V Power Rail circuit - Does this reverse voltage protection work? - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/4/c/8/4c86e90ed71c9ada58181bae04c5d15e4eba2ded.jpeg)
3.3V and 5V Power Rail circuit - Does this reverse voltage protection work? - Project Guidance - Arduino Forum
![Rick on Twitter: "Quick #electronics tip: You can use a p-channel mosfet and a resistor to add reverse polarity protection to a circuit if a diode doesn't work due to it's voltage Rick on Twitter: "Quick #electronics tip: You can use a p-channel mosfet and a resistor to add reverse polarity protection to a circuit if a diode doesn't work due to it's voltage](https://pbs.twimg.com/media/FawyeNyXgAAxCko.png)
Rick on Twitter: "Quick #electronics tip: You can use a p-channel mosfet and a resistor to add reverse polarity protection to a circuit if a diode doesn't work due to it's voltage
![circuit design - Reverse-polarity protection P-channel MOSFET - Electrical Engineering Stack Exchange circuit design - Reverse-polarity protection P-channel MOSFET - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Fh6St.png)