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RS232/485 Shield For Arduino
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GitHub - playfultechnology/arduino-VFD-RS232: Interfacing a Vacuum Fluorescent Diplay (VFD) to Arduino
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RS232 to USB Converter With Arduino Due Or Mega 2560 - Copperhill
103020192 - Seeed Studio - Serial Communication Board, RS232, 3.3V / 5V
Max3232 Rs232 To Ttl Serial Port Converter Module Db9 Connector Max232 For Arduino - Integrated Circuits - AliExpress
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Arduino RS232 to TTL Converter with DB9 (MAX202) - DFRobot
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