I'm looking to turn on a relay threw a logic signal from a keypad. I need to know if there's a programmable keypad I can buy (off the shelf) that already has all the circuitry to program in a number (say 4 digits) and have a TTL type output that will go high when the correct number is typed.
This is my first post here and I've never been on this site so if I'm posting in the wrong spot I apologize.
Any help is appreciated.
This is my first post here and I've never been on this site so if I'm posting in the wrong spot I apologize.
Any help is appreciated.