Need to connect 4 switches to only 1 port
hello there !
i'm having small issue :
i made program, wich must able know state of 4 switches ( if on 0010 state, or 1110 state, etc...)
the problem is, have 2 ports free, others being occupied other things in project.
is there way have arduino knowing wich state switches ?
i thinking of using current divider, don't know how use them, or how make in specific case.
thank in advance reading , answering
( apologies bad english, fellow frenchman's speaking
)
i'm having small issue :
i made program, wich must able know state of 4 switches ( if on 0010 state, or 1110 state, etc...)
the problem is, have 2 ports free, others being occupied other things in project.
is there way have arduino knowing wich state switches ?
i thinking of using current divider, don't know how use them, or how make in specific case.
thank in advance reading , answering

( apologies bad english, fellow frenchman's speaking

do have analog pins available? can use analog input different resistors on each switch identify switches different voltages.
of course analog input can used digital input.
of course analog input can used digital input.
code: [select]
pinmode(a0, input_pullup);
digitalread(a0);
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