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1. ¸ðµâ ±â´É:IO ¸ðµâÀº I2C ÀÎÅÍÆäÀ̽º¸¦ ±â¹ÝÀ¸·Î Çϸç ÀÔ·Â/Ãâ·Â ±â´ÉÀ» È®ÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. 2 °³ÀÇ I/O ÇÉÀ» »ç¿ëÇÏ¿© È®ÀåÇÏ¿© ÃÖ´ë 8 °³ÀÇ Ãß°¡ I/O ÇÉÀ» Á¦¾îÇÒ ¼ö ÀÖ½À´Ï´Ù. ¶ÇÇÑ Ä³½ºÄÉÀ̵ùÀ» Áö¿øÇÏ¿© ¿©·¯ ¸ðµâÀ» µ¿½Ã¿¡ »ç¿ëÇÏ¿© ÃÖ´ë 64 °³ÀÇ I/O ÇÉÀ» È®ÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. ¸ðµâ ÁÖ¼Ò´Â DIP ½ºÀ§Ä¡¸¦ »ç¿ëÇÏ¿© ½±°Ô ¼³Á¤ÇÒ ¼ö ÀÖ½À´Ï´Ù.
2. ArduinoÀÇ ¹è¼± ´ÙÀ̾î±×·¥ ¹× Å×½ºÆ® ÄÚµå:ÀÌ ¸ðµâÀº Arduino º¸µå ¿ë°ú ¿Ïº®ÇÏ°Ô ÅëÇÕ µÉ ¼ö ÀÖ½À´Ï´Ù. Á¦°øµÈ ¹è¼± ´ÙÀ̾î±×·¥À» µû¸£°í Å×½ºÆ® Äڵ带 »ç¿ëÇϸé ÇØ´ç ±â´ÉÀ» ½Å¼ÓÇÏ°Ô ½ÇÇè ÇÒ ¼ö ÀÖ½À´Ï´Ù. Æ÷ÇÔµÈ Å×½ºÆ® Äڵ带 »ç¿ëÇϸé ÇÉ P0 ÀÇ Ãâ·Â »óŸ¦ 2 Ãʸ¶´Ù P7 ·Î ÀüȯÇÏ¿© ³ôÀº ¼öÁØ°ú ³·Àº ¼öÁØÀ» ¹ø°¥¾Æ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù. ¼¼ °³ÀÇ DIP ½ºÀ§Ä¡°¡ ¸ðµÎ `ON` À§Ä¡·Î ¼³Á¤µÇ¸é ¸ðµâÀÇ ÁÖ¼Ò°¡ ÀÚµ¿À¸·Î 0x27 ·Î ¼³Á¤µË´Ï´Ù.
3. ½Ç¿ë:IO È®Àå ¸ðµâ (PCF8574T) Àº ½Ç¿ëÀûÀÔ´Ï´Ù. I2C ÀÎÅÍÆäÀ̽º¿Í I/O ÇÉ È®Àå ±â´ÉÀº ÀüÀÚ ÇÁ·ÎÁ§Æ®¸¦ À§ÇÑ Çâ»óµÈ Á¦¾î ±â´ÉÀ» Á¦°øÇÕ´Ï´Ù. °è´Ü½Ä ±â´ÉÀ» »ç¿ëÇÏ¸é ¿©·¯ ¸ðµâÀ» µ¿½Ã¿¡ »ç¿ëÇÒ ¼öÀÖ¾î Á¦¾î °¡´ÉÇÑ ÀåÄ¡ÀÇ ¼ö¸¦ Å©°Ô ´Ã¸± ¼ö ÀÖ½À´Ï´Ù.
4. °íÇ°Áú:PCF8574T I/O ¸ðµâÀº °íÇ°Áú ¼ÒÀç·Î ¸¸µé¾îÁ® Àå±â°£ Áö¼ÓµË´Ï´Ù.
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Á¦Ç° À̸§: PCF8574T ¸ðµâ Å©±â: 38*17mm/1.49*0.66 ÀÎÄ¡ ¹«°Ô: 4g ¸ðµâ ±â´É: I2C ÀÎÅÍÆäÀ̽º¸¦ ±â¹ÝÀ¸·Î ÇÏ´Â I/O È®Àå ¸ðµâÀº 2 I/O¸¦ »ç¿ëÇÏ¿© 8 I/O¸¦ È®ÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. °è´Ü½ÄÀ» Áö¿øÇϸç ÃÖ´ë 8 °³ÀÇ ¸ðµâÀ» µ¿½Ã¿¡ »ç¿ëÇÒ ¼ö ÀÖÀ¸¸ç 64 °³ÀÇ I/O·Î È®ÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. ´ÙÀÌ¾ó ½ºÀ§Ä¡¸¦ ÅëÇØ ¸ðµâ ÁÖ¼Ò¸¦ ¼³Á¤ÇÕ´Ï´Ù. Arduino °³¹ß º¸µåÀÇ ¹è¼± ´ÙÀ̾î±×·¥ ¹× Å×½ºÆ® ÄÚµå´Â ´ÙÀ½°ú °°½À´Ï´Ù. 2 Ãʸ¶´Ù P0 ~ P7 Æ÷Æ®°¡ ³ô°í ³·Àº ·¹º§À» Ãâ·ÂÇϵµ·ÏÇϽʽÿÀ. ¸ðµç 3 ÀÚ¸® ´ÙÀÌ¾ó ½ºÀ§Ä¡¸¦ `ON` À¸·Î µ¹¸³´Ï´Ù. ÇöÀç ¸ðµâ ÁÖ¼Ò´Â 0x27 ÀÔ´Ï´Ù.
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