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memory card readers
TX and RX LEDs
Stepper Motors can be connected with 4 pin molex connectors
For a closer distance
No need MAX232
Laser Module 5 V 2mm LED KIT memory card readersIntroduction : Device parts Length: 23mm Operating voltage: 4. 5 V 51 Resistance In the ideal case (no dust, no fumes, no barrier), the laser transmission distance is infinite. In general, cloudy night, exposure to 500 meters away from objects, it is clearly visible; For a closer distance, even in the sun of the day, shone on the pavement,outside the building,it is also clearly visible. Application: production of electronic pointer pens, electronic