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MAX3232 RS232 to TTL Serial Port Converter Module DB9 Connector MAX232 For Arduino

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Microcontroller Serial to Parallel Pin IO Expansion Module 74HC595 Output Port Expansion 3 to 24pin LED control

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CP2102 MICRO USB/TYPE-C USB to UART TTL Module 6Pin Serial Converter UART STC Replace FT232

Microcontroller Serial to Parallel Pin IO Expansion Module 74HC595 Output Port Expansion 3 to 24pin LED control

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HL-340 HL340 New USB to RS232 COM Port Serial PDA FT232  9 pin DB9 Adapter support WIN11 Compatible CH340

1-12PCS TTL To RS485 485 To Serial UART Level Mutual Conversion Hardware Automatic Control Power Supply Module 3.3V 5V

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