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Adding an MCP23017 16 port IO expander to Arduino or Esp8266 or Attiny85 or…….. – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
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HiLetgo® 2 x PCF8574 PCF8574T IO Expander Board I/O Expander I2C Evaluation Development Module: Amazon.de: Computer & Accessories
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PCF8575 16-bit I/O Expander for I2C-bus für Arduino Raspberry | Platinen & Entwicklungskits | Halbleiter & Aktive Elemente | Elektronische Bauelemente | Elektronik & Messtechnik | Business & Industrie | Naltronic -
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