Posted by LuSID on October 04, 1999 at 11:40:28:
In Reply to: Splice? Re: Furthermore... posted by saint on October 04, 1999 at 09:49:23:
Each axis has 2 data lines coming from the opti board on the spinner/trackball/rotary stick. The state of these lines, call them A & B, will depend on the position of the device. So even though the device is not in motion one or more of the data lines may be high ( carrying 5 Volts). So if you connect A&B from 2 different devices they will interfere with each other about 75% of the time.
Using a switch will work.
: Torgo - because you are not likely to be using both at the same time,
: have you considered splitting the connections to the serial interface
: and sending them to both the trackball and spinner? I dont' know if
: there would be a resistance or voltage drop problem...
: Also, for )p( - if you are going to use swappable control panels, then one interface
: would do you if you didn't need a trackball and spinner on the same
: control panel.
: --- saint
: : : Yes, you are right in my enthusiasm I did not think about that. But I don't think that will be a problem because I don't have to use the devices at the same time. So I can wite them to a switch or can't I?
: : Yes, you absolutely could wire them to a switch. In my setup, both devices are hot-swappable. Well, not the interfaces, exactly, but the devices that connect to the devices. As long as the interface kits are connected at startup, anything I swap onto them (even on the serial version) works just fine. So a switch is virtually the same concept.
: : By the way, don't worry about your english. If you had not said anything, I would not have known it was not your first language. You really had very few errors. I've seen MUCH worse english...from AMERICANS!