I have 112 switches that output a 0 or 5 volts. I need a way to send this to an Arduino, MEGA2560 , by the serial port, using some CMOS logic or? so that I can tell which switches have changed state. Normal condition is that all 112 are HI=5 volts. Ideas please. The Arduino and the switches are abou…

112 switches need reading

John_Smith November 18, 2012, 7:07am 9

try keypad.h

Topic		Replies	Views
Switch Matrix (a newbie question) General Guidance	11	13904	May 5, 2021
512 Switches to an Arduino? Interfacing	22	9312	May 6, 2021
is it possible to read 90in1? Interfacing	14	5428	May 6, 2021
Arduino Arcade Controller Interfacing	6	8360	May 6, 2021
programing arduino by swtches General Guidance	9	1046	May 5, 2021