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Jeremy Blum

Jeremy is an Electrical and Computer Engineering Student at Cornell University. He has been building microcontroller projects since high school, from a prototype prosthetic hand with a novel control scheme, to a nerf gun that fires at the intruders and uploads their picture to the web.
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  • Hey Jeremy i had a question i asked on another forum but they couldnt seem to answer it. I dont know if they couldnt comprehend what i was asking or if they just dont know i made a video trying to explain it being that i am completly new to the arduino and had no idea what they were talking about.

     

    heres the video

    http://www.youtube.com/watch?v=2IrCplYeUZw

  • in reply to e14 Contributor

    Hi Brendan,

     

    To summarize your video, it looks like you've got a rotary switch (something like a 4-pole 5-way switch), and you want to have a delay in your software

    that corresponds to the switch position.

     

    You can use standard digital inputs, no need to use the analog inputs on your board (or configure the analog inputs to be digital inputs). On the rotary switch, normally the inner ring of contacts are the 'poles', and you can connect one of them to 0V. Then, connect the outer contacts to digital inputs on your board.

    (To confirm that you're using the correct pins before you plug it into the board, you could use a multimeter set to continuity check mode).

    Then, in your code, ensure that the digital inputs have 'pull-up' resistors enabled (see here for information on how to do this).

     

    When the rotary switch is in an appropriate position, then the pin will be forced to 0V, and this is something you can detect in your software.

     

    Search for a code example that detects an input condition, e.g. using digitalRead I think.

    Then, your code can have something like (my syntax may be incorrect):

    if (digitalRead(position0pin)==LOW) delay=2000;

    if (digitalRead(position1pin)==LOW) delay=4000;

    and so on.

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  • in reply to e14 Contributor

    Hi Brendan,

     

    To summarize your video, it looks like you've got a rotary switch (something like a 4-pole 5-way switch), and you want to have a delay in your software

    that corresponds to the switch position.

     

    You can use standard digital inputs, no need to use the analog inputs on your board (or configure the analog inputs to be digital inputs). On the rotary switch, normally the inner ring of contacts are the 'poles', and you can connect one of them to 0V. Then, connect the outer contacts to digital inputs on your board.

    (To confirm that you're using the correct pins before you plug it into the board, you could use a multimeter set to continuity check mode).

    Then, in your code, ensure that the digital inputs have 'pull-up' resistors enabled (see here for information on how to do this).

     

    When the rotary switch is in an appropriate position, then the pin will be forced to 0V, and this is something you can detect in your software.

     

    Search for a code example that detects an input condition, e.g. using digitalRead I think.

    Then, your code can have something like (my syntax may be incorrect):

    if (digitalRead(position0pin)==LOW) delay=2000;

    if (digitalRead(position1pin)==LOW) delay=4000;

    and so on.

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