$20 to $100
A GPIO port handles both incoming and outgoing digital signals. As an input port, it can communicate to the CPU the ON/OFF signals received from switches or the digital readings received from sensors.
$8 to $30
Pmod™ is the Digilent defined standard of Peripheral Modules, small I/O interface boards that offer an ideal way to extend the capabilities of programmable logic and microcontroller boards.
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