Sorry, I don't know what I'm doing. I soldered together this controller board, built my power supply, but I don't know about this printer cable...
Is there an easy way to test the printer cable pins? It's annoying trying to hold the probes to touch two at a time.
But you said I should test directly at the computer. My probes won't fit in the pin holes.
Let me get this straight...
You said:
" Ideally you want all the input/output pins you plan to use to read zero vdc (low) now none will read 0 exactly, you may get some that read 20, 30 milivolts but thats still considered zero."
I want to use pins 2-7. I should test them coming OUT from the PC, correct? They should or shouldn't read 0vdc?
It should read 4-5vdc, when?
Thanks for your time. |