Hi All, I'm trying to ascertain how best to bring the input from a Reed Switch to a DB9 RS232 computer port. Here's the scenario: A friend is planning to ride the Alcan 5000 Rally in 2004 on a KTM Adventurer. I work for a software development company who is going to write a rally program (time, distance, speed) for him. We are mounting a tablet pc on the bike. I can get the Reed Switch setup off the shelf for the standard Enduro style computers easily enough. However, I'm not certain what I need to do to bring that to an RS232 port. Any help would be greatly, greatly appreciated. You can check out the website for the rally at: www.alcan5000.com Regards, Rob
Reed relay?? 300 baud rate?? If so, use external power supply, -15V source thru 4.7K to input pin, relay contacts from input pin to +15V should do the job. I think that the negative level is a logic "one", but it has been over 30 years since i worked with teletypes.....
