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Xrathie

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  1. This sounds alot like what I am trying to do. So how do I send a quest to the external circuit board and then get back a true false...i.e. I send a "45" to the microprocessor and it returns a true or false??? Thanks again for any help.
  2. I want to have 50 keys with 50 locks and I want to be able to tell from the PC which keys are in the lock position and which are not (no key). I assumed that I will make the lock create the contact to close a circuit on an individual wire going from the lock to a circuit board from there I dont know what to plug into the circuit board to make it so that my software can talk to the circuit board and get a true or false for an individual wire (lock/key).
  3. I do have a couple web pages I have found that describe using the parrell port. If I can get away with ONE port with some kind of IC that will read just the signal I want then that would work also. But then again there are thousands of ICs ..which do I need? And what software driver do I need to talk to the parrell port? Or is it just something I should use the Windows API for? Thanks again.
  4. Hello. I am an experienced Windows programmer. However I have not written any drivers and I have little electronics experience (beyond a hobby). My problem is I want to have a series of 50 "switches". I want to make them as low tech as possibe. So I want a simple contact in a circuit to send a single to some kind of "master" IC or whatever when the switch is fliped. Then I want each switch signal to some how send a number like "45" or "50" to a PC via a USB or whatever I can get that is as modern as possible. I have looked at 1-Wire but it looks like it may be over kill for what I am wanting to do. I just dont know how to wire this up so I dont blow up my PC. Thanks for any help.
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