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2Pcs PC817 8 Channel Optocoupler Isolation Board 3.6-30V Driver Photoelectric Isolated Module Voltage Converter Adapter Module sold2023 Bright LED Flashlight&Reading LampOur portable2Pcs PC817 8 Channel Optocoupler Isolation Board 3. 6 30V Driver Photoelectric Isolated Module Voltage Converter Adapter Module It can realize low level driving high level and realize voltage conversion using this module, the IO voltage of the MCU can be graded to achieve isolated drive between different voltage levels Through the selection of the jumper cap of each channel, it is possible to achieve separate control whether it is shared with the