What are you trying to achieve?
Normally, an LED and its series resistor will connect between a GPIO output and either 0V and 3V3. It is, to say the least, unusual to connect a LED between an output and an (isolated) input.
To answer your question, the "resistance" of a GPIO input is high. It may have an internal "pull" resistance switched on, to keep it to a known state when connected to a high impedance source. On a Pi, these pull resistors are between 33K and 73K.
Normally, an LED and its series resistor will connect between a GPIO output and either 0V and 3V3. It is, to say the least, unusual to connect a LED between an output and an (isolated) input.
To answer your question, the "resistance" of a GPIO input is high. It may have an internal "pull" resistance switched on, to keep it to a known state when connected to a high impedance source. On a Pi, these pull resistors are between 33K and 73K.
Statistics: Posted by davidcoton — Sat Sep 21, 2024 10:10 pm