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quick sensor question

lobolobo Posts: 100
edited 2005-10-20 21:52 in BASIC Stamp
How many· ADC0831 8-bit A/D converter DIP·do i need to conect 2 to four·or more ·Sharp GP2D120 Analog Distance Sensor ?
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Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-10-20 16:33
    Why not use an ADC0834 4-Channel ADC?· One chip will do 4 channels on the same three I/O lines.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • SteelSteel Posts: 313
    edited 2005-10-20 16:34
    The 0831 is a 1 channel sensor...So you would need 1 0831 per sensor.· Because it is a serial interface, you need a clock signal, DataIn signal, and Chip select.



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  • NewzedNewzed Posts: 2,503
    edited 2005-10-20 16:36
    Why not use a TLC2543.· That ADC has 11 input channels and will handle 11 sensors.

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    Sid Weaver
    Do you have a Stamp Tester yet?
    http://hometown.aol.com/newzed/index.html

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  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-10-20 16:53
    The only problem I can see using a different family ADC is that if he doesn't know how to calculate for the different resolution, he could have trouble with the math, which is necessary to use this sensor properly, since the output is non-linear.

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    Chris Savage
    Parallax Tech Support
    csavage@parallax.com
  • lobolobo Posts: 100
    edited 2005-10-20 16:54
    where can i get the ADC0834 4-Channel ADC or tlc2543?
  • NewzedNewzed Posts: 2,503
    edited 2005-10-20 17:19
    The TLC2543 is available from Digikey.· 11-channel, 12-bit resolution.

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    Sid Weaver
    Do you have a Stamp Tester yet?
    http://hometown.aol.com/newzed/index.html

    ·
  • lobolobo Posts: 100
    edited 2005-10-20 18:13
    would i connect the adc0834 the the sharp 120 sensor the same way as the adc0831 ? or how and where can i get this info?
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-10-20 19:30
    The ADC0834 is online from any vendor who produces the chip; use Google to find it.

    I've attached a demo program so that you can see the programming differences between the ADC0831 and ADC0834.

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    Jon Williams
    Applications Engineer, Parallax
    TXT
    TXT
    ADC0834.BS2.TXT
    2K
  • lobolobo Posts: 100
    edited 2005-10-20 21:51
    Thank you for your help. I can see why parallax is such a success and can only get better!!!!!!!
  • lobolobo Posts: 100
    edited 2005-10-20 21:52
    that thank you was directed toward jon williams and all who helped me
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