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I/O monitoring — Parallax Forums

I/O monitoring

aridaiosaridaios Posts: 57
edited 2004-10-10 13:55 in BASIC Stamp
Hello my friends,

I·have the following application:

I need to continiuously monitor· 50-60·buttons using a BS2 or BS2P

rule 1:·time between toggle of each button < 30msec
rule 2: max number of buttons pressed simultaneously is 2

does anyone have any similar application?
any suggestions?

regards
michael

Comments

  • Jonny555Jonny555 Posts: 46
    edited 2004-10-10 08:07
    Serial Shift register?
    Some can be daysy chained... check out Stampworks Library on the Parallax site.

    StampWorks Experiment #24: Expanding Inputs
    StampWorks Experiment #24b: Expanding Inputs Further
  • BeanBean Posts: 8,129
    edited 2004-10-10 12:55
    I would look at using a 8X8 matrix of switches. I think there is some documentation that explains a 4x4 matrix.
    I'm not sure about 2 buttons being pressed at the same time ?

    Terry
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2004-10-10 13:55
    Moderator needs to remove one of these threads...I am having Deja Vu Terry!· =)· I gave that answer in another copy of this thread...



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