I want to power something using the parallel port of on an old Dell Dimension 8200. How much current can be drawn from each of the 8 the data pins? I have pulled a maximum of 78mA/pin so far, but what is the upper limit? Can I short pins together to raise this limit?
EDIT: So far I see that powering things directly is not a possibility and that putting pins together is a no-no. However, it would be nice to be able to turn things on and off using the data pins, which would mean a relay. These things draw current too, what should be the amount of current that they are allowed to draw?