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  1. M

    Amateur Question About Digital I/O

    Resqueline, thanks a lot for the help. That's my biggest fear is burning up the controller. I'll try working with the NPN transistors and go from there.
  2. M

    Amateur Question About Digital I/O

    Yes, I am worried that the circuit is flawed which is why I am looking on this forum for some advice as to how it can be fixed.... The 12V and the 3.3V have independent grounds which is why I am worried I cant use a transistor because it appears the transistor has to share a common ground...
  3. M

    Amateur Question About Digital I/O

    It was there as a preliminary precaution because I have to use both the 12V and the Controllers Ground as Common. I mean, I am not confident enough to build a circuit like this on my own without that precaution, but I suppose it does make sense. I'll try removing it and see where that gets me.
  4. M

    Amateur Question About Digital I/O

    Thank you guys for all of your help. I have actually found that the IC's digital I/O isn't powerful enough to drive a cost-effective relay. I have decided to try to stick with transistors to drive the larger load. Cost is a major factor because each individual circuit could have upwards of...
  5. M

    Amateur Question About Digital I/O

    Thanks for the reply. That's what I was thinking I would do. Use the digital IO to control either transistor or a mechanical relay.
  6. M

    Amateur Question About Digital I/O

    Not meaning to double post but I believe I just answered my own question. Mods can delete this thread if they would like.
  7. M

    Amateur Question About Digital I/O

    I have a pretty amateur question about Digital I/O. If I have a device that contains so many digitial I/O pins, say 32, it is relatively easy to get this device to control simple circuits. For example, how difficult would it be to get this device to control so many LED's using the digital i/o...
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