i\p & o\p same pin

sahu · Apr 2, 2011

i have requirer i\p & o\p same pin .i\p as logic high\low & o\p is for relay drive ...
it may possible ?

alexan_e · Apr 2, 2011

And how can you detect the input voltage when you provide an output to a relay,
the input should be able to change that output voltage , how can this be done.

The only possible solution would be if with a pin that changes between input and output function (in a fast fast rate) and with loads (maybe relay can work) that will not react to that fast switching and will stay on.

Alex

sahu · Apr 2, 2011

alexan_e said:
And how can you detect the input voltage when you provide an output to a relay,
the input should be able to change that output voltage , how can this be done.

The only possible solution would be if with a pin that changes between input and output function (in a fast fast rate) and with loads (maybe relay can work) that will not react to that fast switching and will stay on.

Alex

i hope my hardware & software problem ?
sages me

2bengg · Apr 3, 2011

it is not possible to read an input on one pin and then use that same pin to drive a relay.
it is a hardware related thing, how can something give you an output and then also receive an input ?

i\p & o\p same pin

sahu

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sahu

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i\p & o\p same pin

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