There are two objects which must be created to use the library. The MAX72XX object defines the interface to the MAX7219/MAX7221 driver chip; only one MAX72XX object is required for each chain of ...

Compile-time options to optimize for memory: ...

After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

RA2L2 low-power MCUs are the industry’s first MCU to support USB-C Revision 2.4 with 15W CC detection, USB FS, CAN, I3C, and low-power UART.

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