Difference: SevenSegmentDisplayAndKeypad (5 vs. 6)

Revision 62021-01-22 - UliRaich

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Seven Segment Display and Keypad

The Seven Segment Display and its TM1637 controller

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The keypad has a total of 16 switches. These are connected to 8 pins organized as 4 rows and 4 columns.

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The job will be to find out which column makes a connection to which row in order to find out which switch is closed. This can be done by connecting e.g. the 4 row pins to GPIO outputs and the 4 column pins to GPIO inputs with pull-ups.

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The job will be to find out which row makes a connection to which column in order to find out which switch is closed. This can be done by connecting e.g. the 4 row pins to GPIO outputs and the 4 column pins to GPIO inputs with pull-ups.

Set the first row pin to low and check on each column pin if you read a zero. If you do, you have found the switch closed. If not, continue the same procedure on the other row pins.

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