My wall oven microwave combo unit membrane keypad has failed. Parts for the unit stopped being made many years ago.
A new oven is above $3000 plus $500 installation.
So I decided to make a replacement keypad myself.
I decided to use push buttons in place of a membrane.
There are 22 buttons in all that are matrixed into a 10 wire dupont sized ribbon connection.
I've gathered the push buttons and a prototype circuit board plus the keypad matrix map for the existing membrane.
I'm having trouble visualizing the circuit I need to create. That is, I have a schematic to follow but I'm not sure how to translate that schematic into a real-world circuit layout.
Help me figure that part out.
PS I am including photos but they seem to be too large to post in a single entry so I'm adding them in a second entry.