• 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...
  • 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...
  • LPC2148 4x4 Matrix Keypad Issue
    i m a M.Sc Electronics Student and now i have been told to interface the keypad on the Dev kit the board is Called Spirit II from Oasis, it has a LPC2148. the keypad is a matrix keypad. now whats done...
  • switch case statement bouncing
    switch(periodplay) { default : NVIC_ST_RELOAD_R = 0;Sound_Off(); break; case 0x01: NVIC_ST_RELOAD_R = beatC0 ; break; case 0x02: NVIC_ST_RELOAD_R = beatD; break; case 0x04 : NVIC_ST_RELOAD_R =...
  • 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....