[33] GPIO Pull-up/Pull-down resistors explained

NOOB: When doing GPIO the Flipper Zero has built-in pull-up and pull-down resistors that you can enable. This video looks at what those resistors do & why you would want to enable them.

In a future video, we will look into more details on how the Flipper Zero implements the pull-up/pull-down resistors.

[karoljamison]

@austinjenkins6841 According to my professor in engineering school, voltage is a difference in potential. Say you have a big pile of electrons, like a battery, then when you connect that to a circuit, the electrons flow towards where there's "no electorns" (ground) this movement of electrons is electricity. the difference between the power supply and ground is the voltage, or potential energy of the circuit. I hope this helps.

[MrDerekJamison]

It was a pencil. The pencil is made of graphite, which isn’t a great conductor (which makes a decent resistance). It’s about 200K ohms and not super consistent depending on where you connect to. Still, you can do things like parallel and series resistors just by drawing them with a pencil - which I think is fun way to learn.

[austinjenkins]

Im very new to electronics and circuits and this helped me understand pull up/pull down resistors so much better. Thank you! Might I ask where on the circuit the black wire coming from the multimeter was attached? I’m still a little confused on what exactly voltage is and how we get 0 V when the circuit is complete.

[manolovalenzuela]

Did you create a resistor with a pen?? 😲