Hi Every one.
I have quite old computer and it has Com connection on the motherboard and I have a long usbasp cable (10 pin) that fits in to, can i use that connection like my usbasp connection?
Thanks.
What computer, what motherboard?
I doubt it. That com header on your motherboard is likely for an RS-232 serial port.
Yes, I guess too, rs232 Com connection.
old Desktop pc that has no mark name.
Like this one
What about pin out like usbasp?
Great Explanation, so it won't work like that. Thanks.
You can use this to convert it to TTL levels if you can find the adapter cable in post #5.
RS232 to TTL
And if you try to use an onboard serial connector be aware that there were (at least) 2 different pinouts that were dependent on how the 9 pin connector at the other end was laid out. In one the pins were connected sequentially (hand soldered), in the other they were alternating (IDC crimp).
One more question If I'm wrong please correct me. Could we use Com Port1 like Ftdi232 https://www.electroinvention.co.in/wp-content/uploads/2022/08/ftdi-connection-with-arduino-1.png There is all we need. Rxd Txd DRT Cts Ground maybe we need only Vcc 5V external?
