Description
Slot Type IR Optocoupler Speed Sensor Module 3.3V-5V Counter Module 51 AVR PIC 3.3V-5V Diy Kit Optical Speed Measuring Module

Original price was: $ 1.51.$ 1.03Current price is: $ 1.03.
Slot Type IR Optocoupler Speed Sensor Module 3.3V-5V Counter Module 51 AVR PIC 3.3V-5V Diy Kit Optical Speed Measuring Module
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