Velleman projects K6727 Assembly instructions - Manual (Page 8)

8
You can select your own code for a transmitter/receiver combination. There is a 9 row jumper island located directly
next to IC1 for setting the code. The code is set by connecting one or more code points to a neighboring ‘+’ or ‘-‘ point
using the small jumpers. Code points may also be left unconnected (open): see figure.
Note: certain points cannot be connected to ‘+’
17. Create your code
a) No connection
c) Code connection to ‘+’
b) Code connection to ‘-’ c) Example of a possible code
Personal code