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It has a 16 MHz crystal
and an external PCB antenna that may be connected to your board
EM-18 RFID Reader Module utilizes radio-frequency electromagnetic fields to transfer data
Industrial automation machinery
5mm Red/Green Bi-Colour (Common Cathode) 3 Pin LED White Diffused Lens 220E It has a 16 MHzA small Red and Green bi color 5mm light emitting diode with a common cathode that produces consistent light and consumes little power, contained in a milky white packaging. It is suitable for PCB or panel mounting. In a shared cathode design, diodes are linked. The common cathode is the centre leg, and it is the place where a resistor should be installed for the protection of the LED. Pin Configuration Pin Name Description Anode The positive terminal
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