ADC, TTL and PCINT - what's the difference?

Other Hardware 3rd Party Boards
1

Quick couple of questions on this.

On Mega Rev3 board, pins ADC[8..15] (PCINT[16..23]), would like to configure them to read status of equipment (put to 5) error TTL signals. Can these pins be programmed to do that?

thanks

2

kris123berkeley:
Quick couple of questions on this.

On Mega Rev3 board, pins ADC[8..15] (PCINT[16..23]), would like to configure them to read status of equipment (put to 5) error TTL signals. Can these pins be programmed to do that?

thanks

Did you try; they are digital IO pins as well as analog input pins.

How does your question relate to the difference between INT and PCINT?

3

@kris123berkeley

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4

Yes.
Lookup: pinMode() and digitalRead() functions.
Have a common ground between the mega and the device you are connecting to.

5

6v6gt:
Yes.
Lookup: pinMode() and digitalRead() functions.
Have a common ground between the mega and the device you are connecting to.

The OP doesn't give much details about the "equipment" status that needs to be monitored.
I generally go for opto-isolation between arduino and other equipment in most cases.