zxrepairman
New Member
What i am trying to do is to moniter a external switch and graphically represent it on my pc the software side i think i can solve but the electrical side is causing me a few headaches..i need to do this either through the usb,parallel or serial.as i do not want or need to control the switch
can i use the power from the computers port serial,usb or parallel send that current to the switch and determine wheather or not it is on or off .
or will i have to incoperate a A D C into the cable and use a external powersupply.
or is there an entirely different and easier way my main object is that it is cheap and not involve opening up the pc
as you probably tell i am new to this so any help however small is gratefully recieved
can i use the power from the computers port serial,usb or parallel send that current to the switch and determine wheather or not it is on or off .
or will i have to incoperate a A D C into the cable and use a external powersupply.
or is there an entirely different and easier way my main object is that it is cheap and not involve opening up the pc
as you probably tell i am new to this so any help however small is gratefully recieved