Is it time to make a PCB yet?
The short answer is yes. The board design has been finalized and tested by milling a PCB using the other mill. Both rubber dome pad interlaces needed to be designed and validated. We we able to do that using the cut PCB. We will use JLCpcb to produce the PCBs so we can assure that they work hahaha.
Prototype PCB, the bottom row shows the pad traces for the rubber dome switches.
Circuit diagram for the PCB.
Board view of the PCB.
Virtual PCB representation.
Milled PCB with 6 mechanical switches installed.
Four iterations of the milled PCB.
Example code for a 3 x 3 matrix.
#include <Keypad.h>
const byte ROWS = 3;
const byte COLS = 3;
char nonaGrid[ROWS][COLS] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'}
};
byte rowPins[ROWS] = {9, 8, 7};
byte colPins[COLS] = {5, 4, 3};
Keypad keyTester = Keypad(makeKeymap(nonaGrid), rowPins, colPins, ROWS, COLS);
void setup(){
Serial.begin(9600);
}
void loop(){
char keyTester = keyTester.getKey();
if (customKey){
Serial.println(customKey);
}
}