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Topic: TTL using digital outputs (Read 4 times) previous topic - next topic

T_Grocchus

I took out the series resistor and it looks like everything is working, so thank you!  To be certain I have accurate communication, should I use a pull-down resistor prevent noise triggering a signal.  If so, whaat size is appropriate?  I believe this entails connecting the output pin to ground with a resistor...correct?


Grumpy_Mike

Quote
should I use a pull-down resistor prevent noise triggering a signal.

No, it won't help.
If anything a pull up of 4K7 at the remote end would help your noise margin.

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