Arduino: read a 4x4 membrane keypad with 8 pins
Read a 4x4 keypad with 8 Arduino pins instead of 16 by scanning rows and columns. The matrix-scan trick behind every keyboard ever made.
Tag
#matrix
1 tutorial
Tag
1 tutorial
Read a 4x4 keypad with 8 Arduino pins instead of 16 by scanning rows and columns. The matrix-scan trick behind every keyboard ever made.