The 74x125 is not a level shifter. It is a tristate buffer that can be exploited for poor-man's level shifting with a suitable configuration of external components. It isn't an ideal part to do this and it would be nice if the purveyors of hacker/maker doodads didn't misrepresent what they're selling.
> Without a resistor, the open-collector signal stayed at ground. Adding the resistors to my circuit fixed that problem.
That never would have been an issue with an actual level shifter.
The 74x125 is not a level shifter. It is a tristate buffer that can be exploited for poor-man's level shifting with a suitable configuration of external components. It isn't an ideal part to do this and it would be nice if the purveyors of hacker/maker doodads didn't misrepresent what they're selling.
> Without a resistor, the open-collector signal stayed at ground. Adding the resistors to my circuit fixed that problem.
That never would have been an issue with an actual level shifter.