2PCS Slot Type Optocoupler Module 3.3V-5V LM393 Comparator Slot-Type For Arduino
1,04 €
The comparator output, the signal is clean, the waveform, driving ability, more than 15mA. Module slot unobstructed, receiver tube conduction module DO output low, shelter, DO output high. 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.
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