I used a 1k Ohm resistor in line to all the outputs as recommended,
I can use standard outputs to talk to a TTL device right?
would removing the resistor give me better fidelity?
The other way round would possibly have issues.
Thank you for the quick replies....here is more information.I was under the impression that you should always have a resistor in series with an output line to prevent drawing too much current and damaging the arduino output. I am using a common ground for four outputs. Each TTL out has its own digital output connected to about 6 feet of unshielded, braided 22 gauge wire, These lines are soldered to a coaxial pin as shown in the attachment. I will try removing the resistor and seeing if it works properly.
I was under the impression that you should ........
QuoteThe other way round would possibly have issues.What would that be Mark?
should I use a pull-down resistor prevent noise triggering a signal.