I want to adapt the output of a board to drive additional logic instead of an LED. The driver board has a current limiting resistor before the signal is routed to the connector. Is there any problem leaving the resistor in the circuit? I can modify the driver board, but would prefer not to.
The logic gates are TTL 74xx in the Low power Schottky family.
(A simplified schematic of what I have in mind).
The full schematic is here