Shutao 2Pcs PC817 8 Channel Optocoupler Isolation Board 3.6-30V Driver Photoelectric Isolated Module Voltage Converter Adapter Module

2Pcs PC817 8 Channel Optocoupler Isolation Board 3.6-30V Driver Photoelectric Isolated Module Voltage Converter Adapter Module

ALLECIN SN74HC595N 8-Bit Shift Registers with 3-State Output Registers DIP-16 SN74HC595 74HC595 Shift Register (Pack of 30pcs)

BOJACK PC817 OPTOCOUPLER DIP Installation PC817C 2.54 mm Pitch 4-pin DIP-4 (Pack of 50 pcs)