Creator wrote:David wrote:Yes, I would start and stop, and yes a simple push button would be enough.
Then just buy a simple push button and connect its pair of contacts to 2 pins of COM port as stated at the picture. Modern PC might need USB to COM adapted.
For modern PC's is another inexpensive solution: remake old usb mouse(solder external button wires to mouse microswitch connections) and assign mouse button(to wired microswitch) in Hotkeys... .