Hi folks,
I haven't been here for a while. I have been busy on other pursuits. I have been building a CNC machine. It has been a long and quite expensive exercise. However, I have come up against a problem that I hope you guys can help me out with. I needed a breakout board from my LPT input that required a hand control and a digital readout facility. I have managed to get hold of a breakout board that has these facilities but I am concerned that it does not have opto-isolation. I do have another very simple board that does have opto-isolation and it appears to be a straight through board from the input without any other facilities except it seems to be nothing other than the I/O signals are intercepted by 17 opto-isolators for all the I/O signals except for the ground connections.
My question is; if I give the simple board the same power supply as the more complex board, can I insert this board in series with the parallel connection from my PC and thereby give me opto-isolation?
I haven't been here for a while. I have been busy on other pursuits. I have been building a CNC machine. It has been a long and quite expensive exercise. However, I have come up against a problem that I hope you guys can help me out with. I needed a breakout board from my LPT input that required a hand control and a digital readout facility. I have managed to get hold of a breakout board that has these facilities but I am concerned that it does not have opto-isolation. I do have another very simple board that does have opto-isolation and it appears to be a straight through board from the input without any other facilities except it seems to be nothing other than the I/O signals are intercepted by 17 opto-isolators for all the I/O signals except for the ground connections.
My question is; if I give the simple board the same power supply as the more complex board, can I insert this board in series with the parallel connection from my PC and thereby give me opto-isolation?