• 4x4 Matrix keypad help
    Hi, i am new to ucontroller programming. I wanted to make some password and 7-segment display projects using 4x4 matrix keyboard as input, in C. I just need some simple example links or sample code...
  • 4x4 keypad
    Hello, i was wondering if anyone could help me, to get my 4x4 keypad scanning function working. Its supposed to drive each column to zero one at a time and then poll each row in sequence for zeros....
  • Key de-bouncing in 4x4 matrix keypad
    I'm using 4 x 4 keypad to send the output to 2 7-segment LED. problem: key de bouncing problem Summary problem: when I press key, it shows both digit on the left and right. For example, if I...
  • Key de-bouncing in 4x4 matrix....
    hi , i am not well in english ,try to understand my language. here i am using 4x4 matrix keypad .... problem: key de bouncing problem requirement: when i press key and i hold it some time...
  • Using an 8051/8052 microcontroller to decode a 4x4 matrix keypad
    I want to know how to use a lookup table to decode a 4x4 matrix keypad e.g a Grayhill 96 series keypad in 8051/52 assembly language.Please, may you send me example assembly code used in this decoding...