re multiple inputs for pc in article u uicvm uic edu u uicvm uic edu writes can anyone offer a suggestion on a problem i am having i have several boards whose sole purpose is to decode dtmf tones and send the resultant in ascii to a pc these boards run on the serial interface i need to run of the boards somwehat simultaneously i need to be able to ho ok them up to a pc the problem is how do i hook up serial devices to one pc inexpensivley so that all can send data simulataneously or close to it any help would be greatly appreciated abhin singla if you can modify the design of the dtmf decoder the ideal comunications would be over a multi drop system like rs rs boards are available for pc s probably cheaper than a bunch of rs channels and rs is cheaper to build onto your satellite modules using only a single supply pin dip driver chip software at the pc end would be similarly complex for either rs or rs in my opinion the higher data rates possible with rs would permit quasi simultaneous data transmission hope this helps rod nussbaumer programmer technologist bitnet bomr triumfer triumf university of british columbia internet bomr erich triumf ca vancouver bc canada phone ext
