Shop OBEX P1 Docs P2 Docs Learn Events
4x4 keypad — Parallax Forums

4x4 keypad

dr hydradr hydra Posts: 212
edited 2012-12-14 12:00 in Propeller 1
I am looking at Beau Schwabe's object 4x4 keypad reader V1.0...Can someone further explain what a BOX entry is when multiple buttons are pressed?

Comments

  • Duane DegnDuane Degn Posts: 10,588
    edited 2012-12-14 12:00
    As an example, let's use Parallax's 4x4 keypad.

    If buttons 2, 4 and 5 where pressed, you wouldn't be able to tell if button 1 were pressed since it was "boxed" in.

    BTW, Beau's code only works with very short leads. Longer leads may require 0.1uF capacitors on either the columns or the rows (I don't remember which).
Sign In or Register to comment.