A small control transmitter using a 16-key keypad.

This transmitter is intended to be used with the Garage Door Opener Receiver, but, as a bonus, it will operate any of the other receivers using a 9 followed by a 2-digit code.

It replaces a conventional remote from "Genie", whiose receiver failed. It has additional security in that knowledge of the 3-digit code is needed to raise the garage door.


Lamp Codes

This is the inside. The design is very compact since the pins on the keypad alogn with the pins on the picaxe, except for one, and are directly connected using stripline

Here is the circuit diagram. The matrix keypad greatly simplifies the circuit. but I felt obliged to make a flowchart before attempting the code

Here is the program code.