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Mechanical 7 Segment Display V2
Should work. You just need to ensure that you know which row and column the switches are connected in the matrix. You don't have to connect all switches. I am only using four switches as well. I have them connected to pin 14, 15, 16, 10 and 9 (last row of buttons in the diagram).
Any chance you can upload the complete code?
OK, found the code on Github: https://github.com/AM-STUDIO/32-FUNCTION-BUTTON-BOX/blob/master/ARDUINO_BUTTON_BOXV2.inoJust use this ino file. It has all of the missing bits.
Very nice build! Well done.
You indicated in the title that this is a Pavlova recipe, but you made meringues?
Very nice idea and execution!
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