John Chapman, Administrator
Just curious - how are you driving the relay? I ask because parallel ports can't source or sink more than a couple milliamps at best. Higher currents can quickly cause damage.
Have you tested the parallel port's output with an LED + resistor or oscilloscope?
Blair Jarvis, Administrator
But is there any reason to think that if the signal works in the IO test utility that it wouldn't work when using it in MediaLab (assuming the values mentioned are the same, e.g., sending the signal 255 to port 888 for 50ms; and also assuming the same machine is being used for both the test and for the MediaLab session)?
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