i need only to get any voltage out from my laptop to control a relay
how to get a signal from a LAN port from any pin ?
in my laptop there is no com Port or lpt Port also the usb port needs interfacing circuits which is not nessesary in my simple project
thats why i choosed the LAN Port
i use (visual basic 6)
any help would much appriciated .
While such things as PoE exist, normal ports do not provide any power to external devices. The USB ports are far more likely candidates since they are designed to support powering external devices, though the amount of current supported varies by adapter/hub (most "ports" are actually internal hub ports).