Protection for Sending a High Signal to another Stamp

Guido

Would I need some sort of protection if I were sending a High Signal output from, Lets say a Master Stamp to a Slave Stamp?
The Slave will NOT send an Output'
Thank You
Guido

Taisho

I got help from people on the same basic topic.·

http://forums.parallax.com/showthread.php?p=718318

Also there is a document on Parallax called "A Tale of Two Stamps" from the "Nuts and Volts" columns that might help you.

Ugha

I've found its almost always a good idea to put a resistor on an IO pin... especially if your going to hook up pure VSS or
VDD to it (which is what you would do if you happen to set one pin to HIGH and one to LOW by accident).

I'd recommend a 1k resistor between the pins and very carefully checking your code to ensure you don't have them
both in output mode at the same time.

The best bet if you want to have serial communication between stamps, is two pins. One as a control line and one as a data
line. This avoids a lot of pitfalls and problems.