Well need to change the circuit first to this you could also just remove the 10k resistor to gnd from the previous circuit. You can think of an open drain gpio as behaving like a switch which is either connected to ground or disconnected. Push Buttons Should I Be Using A Resistor Or Not Yes How To Handle Strapping Pin Gpio 12 Mtdi Micropython Gpio Startup A push button is connected to gnd. Pull up resistor gpio . Its the same thing but in reverse. But while configuring a gpio pin which will be connected to an led what is the use of these settings. Now connect the other contact of the button to ground. I tried no pull up and pull down and pull up for example but i could not see a difference in the implementation. Now lets look at the opposite. When the push button is not pressed the nand gate input is high. I understand why and h...
