does this need to be set to 3.3v or will it work for ps3 syscon just by plugging in?

It is a 3.3V USB to TTL adapter.

Questions & Answers: DTECH USB to TTL Adapter 3.3V 4 Pin USB to UART Debug Cable Prolific Chip LED Indicators PL2303 IC Serial Converter 6ft Output 3.3 Volt for Windows 11 10 8 7 XP MAC Linux Easy Debugging Programming

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DTECH USB to TTL Adapter 3.3V 4 Pin USB to UART Debug Cable Prolific Chip LED Indicators PL2303 IC Serial Converter 6ft Output 3.3 Volt for Windows 11 10 8 7 XP MAC Linux Easy Debugging Programming

ideal USB 2.0 debug tools for Vendor ID re-write, router, GPS, set top box, transmitter, flash firmware,Debugging,Programing , etc.

$18^.99 –