MAX7321 I2C Port Expander with 8 Open-Drain I/Os | Analog Devices
pyControl - Port Expander - LABmaker
Remote MCP23017 I2C 16-bit Port Expander Breakout Board — PMD Way
PCF8574 I2C to 8-bit digital port expander
IO-Port Expanders Offer Flexibility in MCU Designs | DigiKey
I/O Expander - MCP23008 - COM-15099 - SparkFun Electronics
MCP23017 - i2c 16 input/output port expander
MikroElektronika - Port Expander Board - MCP23S17 Development Tool
New 16-bit GPIO Port Expander, Provides I2C interface and Level Shifting for any Peripherals
Port Expander Library
Microchip Technology Inc. MCP23017-E/SP I/O Port Expander, 16-Bit, I2C I'face, SDIP-28: Amazon.com: Industrial & Scientific
$3.29 - 16 Port Expander: SPI MCP23S17 - Tinkersphere
I2C Port Expander Board (Arduino code included!) from Celtic Engineering Solutions on Tindie
16 Io I2c Io Expander I2c Port Expander Mcp23017
GMS 10 | Garmin
Inline MCP23017 I2C 16-bit Port Expander Breakout Board — PMD Way
Port Expanders Extend MCU Functionality | DigiKey
Pcf8575 Module Expansion Io Port Expander Board Dc 2.5-5.5v I2c Communication Control 16 Io Ports For Arduino - Integrated Circuits - AliExpress
Atlas Scientific 8:1 Serial Port Expander
AK-PCF8575 – I2C 16-bit IO Expander Breakout | Artekit Labs
MCP23017 I2C 16-bit Port Expander Breakout Board - Ten Pack — PMD Way
Pcf8575 Io Expander Module I2c To 16io Integrated Circuits For Arduino - Instrument Parts & Accessories - AliExpress
$2.99 - 16 Port Expander: I2C MCP23017 - Tinkersphere
MCP23008 - i2c 8 input/output port expander : ID 593 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Daktronics Port Expander - Graphics Outfitters
