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Topic: Multiple input - outputs (Read 490 times) previous topic - next topic


Now that is looking neat.

My recommendation is to use the module I linked in reply #1.

(I ordered one when I looked it up.  :smiley-lol: )


May 24, 2019, 01:27 pm Last Edit: May 24, 2019, 01:29 pm by Robi26
I would be the best to use module.

A few more things. If you look at datasheet, at page 3.

Pins A0, A1 and A2 are for determinate I2C adress. It says you can connect them to Vcc or GND (picture on page 1 and 23 showing connection to GND).

Description of pins P00 to P16 is input/output - push/pull design structure.
What is meaning of push/pull?

Pull up - for get signal you connect pin to gnd?
Push down - for get signal you connect pin to Vcc?

Is this two correct?


May 24, 2019, 06:41 pm Last Edit: May 24, 2019, 06:42 pm by Grumpy_Mike
When talking about inputs you pull up or pull down.

When talking about outputs you don't so much say push, as say to source or sink current.

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