5 STCK. 3,3 V-5 V Steckplatz Typ IR Optokoppler Geschwindigkeitssensor Modul LM393 für Arduino
3,95 €
Module DO connected to the relay, composed of the limit switch functions can also be connected to the active buzzer module, composed of the alarm. Module slot unobstructed, receiver tube conduction module DO output low, shelter, DO output high.
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