How To Add Together 128 Extra I/O Ports Without Upgrading Your Microcomputer!

Do you lot desire a crazy sum of Digital Input in addition to Output (Digital I/O) inwards a pocket-size infinite without upgrading your microcomputer?

You tin attain this alongside the DIGIO-128 super-mega digital I/O card. The DIGIO-128 lets you lot add together 128 GPIO (General Purpose Input/Output) lines, thank you lot to the Microchip MCP23017, which is a 16-bit full general occupation parallel I/O port expander alongside I2C ii wire series interface in addition to 28-pin ICs that supports 100kHz in addition to 400kHz.

The 128 digital I/O lines are accessed via 8 I/O connective pins, each offering xvi digital I/O, 2 mightiness in addition to 2 ground. The distance betwixt the pivot connectors (pitch) is 0.1". DIGIO-128 uses 8 Microchip MCP23017 inwards total, offering xvi inputs or outputs each in addition to a maximum of 128 extra I/O ports.
You tin function 128 LEDs straight yesteryear the I/O pins i at a fourth dimension every bit each I/O has a 25mA sink/source capability, which agency DIGIO-128 tin back upward a relatively depression impedance load, providing 25mA per pivot of electrical flow from the output pivot for driving a logic high output, every bit good every bit permitting 25mA of electrical flow to overstep through the pivot to the microcontroller's Earth pin, when driving the output low. The DIGIO-128 likewise uses a unmarried 4-pin host interface connective for ground, power, clock in addition to data.

The DIGIO-128 is compatible alongside microcomputers similar the Raspberry Pi, BeagleBone Black in addition to Arduino every bit it's able to run at either 3.3V or 5V, thank you lot to the other chip on-board (Microchip 24LC024), which is a 2Kb Serial EEPROM alongside a voltage arrive at of 1.7V to 5.5V (and 256 x 8-bit memory).

What's non bad nearly the DIGIO-128 is that it allows to salve board space and save valuable digital I/O pins for other uses every bit you lot tin run only 4 wires alongside these ICs.

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