Hello,
Let's state about my schema:
3 Poles switch (SP3T) that could select:
logical 1 VCC
logical 0 GND
external input
as my input.
My input then go to a buffer. The buffer ouput is wired on resistor + led to GND.
I'm wondering if i need pullup (for logical entry 0), pulldown (for logical entry 1). The switch commutation is manual, so user will need to either choose a level or external input, then work with. What is the design rule in such a case ?
Is 10k suitable ?
Let's state about my schema:
3 Poles switch (SP3T) that could select:
logical 1 VCC
logical 0 GND
external input
as my input.
My input then go to a buffer. The buffer ouput is wired on resistor + led to GND.
I'm wondering if i need pullup (for logical entry 0), pulldown (for logical entry 1). The switch commutation is manual, so user will need to either choose a level or external input, then work with. What is the design rule in such a case ?
Is 10k suitable ?