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MAX7313 16-Port I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection | Analog Devices
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PCF8574 I2C IIC Erweiterung I/O 8-Bit MCU Expander ESP8266 Arduino Raspberry STM | eBay
IO Expander Breakout kaufen bei BerryBase
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port expander | Zuzebox's Blog
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Port-Expander erweitern MCU-Funktionalität | DigiKey
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MCP23017 Serial Interface Modul IIC I2C SPI Bidirektionale 16-Bit I/O Expander Pins Serielle CJMCU-2317 - AliExpress Elektronische Bauelemente und Systeme
32-Kanal Digital Expansion HAT für Raspberry Pi - RobotShop
SparkFun I/O Expander Breakout... kaufen bei BerryBase
