[ts-7000] Using a button on 7400

["aussie_in_seattle" <>]

Hi folks, a newbie hardware question, hope someone can put me on the
right path....

I want to add a simple momentary pushbutton on DIO_01, and poll its
status with software.  Can I just wire the button between the 3.3V
supply and DIO_01?  i.e. input DIO_01 floats when NC, is at 3.3V when
pressed.

This appears to work, but I'm wondering whether I should add a
resistor to limit current (if so, how do I determine the value?) or
any other circuitry for debouncing.

cheers, Andrew



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