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1pcs Pl2303 Usb To Rs232 Ttl Converter Adapter Module/usb Ttl Converter Uart Module Ch340g Ch340 Module 3.3v 5v Switch - Integrated Circuits - AliExpress
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CH340G USB to RS232 TTL module schematic (D-SUN-V3.0) · Nice Circuits - Electronics, 3d printing and robots
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