5 PCS Optocoupler Isolation Board, Icstation DC 12V Optocoupler Isolation Module EL817 1 Channel Opto PNP NPN Signal Converter, Isolator High-Level Trigger 80KHz
AEDIKO 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level
Arduino Uno REV3 [A000066]
ISIcstation 12V EL817 1 Channel Optocoupler olation Board Positive Phase Amplification High Level Trigger 80KHz
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