EZIO2x4 analog inputs stuck ON 2008-06-11T21:04:43+00:00

HOME Forums Input/Output EZIOxx EZIO2x4 analog inputs stuck ON

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  • Anonymous
    Post count: 10
    #39970 |

    I apologize in advance for my ignorance on this.

    I’m using the EZIO with an ISY. I don’t believe the ISY correctly supports the analog inputs (3 and 4), so I’m not using them.

    When I set the EZIO up, the inputs were ‘floating’ between ON and OFF. I went ahead and tied both to the ground, and now they are stuck ON.

    For cosmetic reasons, I’d prefer it if they would show as OFF. Based on another post I’ve read I can get that done by tying them to the +5V instead of the ground with a pair of 10K Ohm resistors. I’m not overly familiar with this, so I’m looking for a bit more information.

    Would this be sufficuent?
    http://www.radioshack.com/product/index.jsp?productId=2062347&cp=&sr=1&origkw=10k+resistor&kw=10k+resistor&parentPage=search

    Thanks!

    Anonymous
    Post count: 1001

    Placing GND on AN1 and AN2 turns the respective input on. Using what are referred to as pull up resisters between AN1 and AN2 and 5V will turn the respective input off.

    AN1—-10K resister—-5V
    AN2—-10K resister—-5V

    In digital mode you connect AN1 and AN2 through pull up resisters to 5V to turn each input OFF. To turn either AN1 or AN2 on, connect the respective input to GND through some type switch, leaving the 10K resisters connected to 5V.

    GND—switch—AN1—10K resister—5V
    GND—switch—AN2—10K resister—5V

    When the ANx input is connected to GND, the input will turn on. When the GND is removed, the pull up resisters will turn the input off. The EZIOxx cannot come with these pull up resisters installed as that would prevent AN1 and AN2 from operating in analog mode.

    Either 1/4 watt or 1/2 watt 10K resisters are fine.

    Anonymous
    Post count: 10

    I will give it a shot. Thanks again!

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