Hi buckler I’m new to adding some button and rotary knob for rpi 3b+ /4b
I just want to learn and explore how can i add those button and knob.
1st question, is it necessary to add resistor like 10k ohms/resistor to the GND wire from pi gpio and button?
2nd,can i use some rotary knob from local online shop like this? And do some execution as you posted?
Lastly, for shutdown button or open button i want to use momentary push button with led light like in the picture below,
Can you provide me the diagram and wiring thank you so much,
