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EM-18 RFID Reader Module utilizes radio-frequency electromagnetic fields to transfer data
Brown for these 36K resistors
of Pins 38
The switch status is read through 485
1x4 Matrix Keypad Membrane Wires EM-18 RFID Reader Module utilizesDC 12V 14 Key Matrix Membrane Switch Keypad is a high quality product at a very low cost for your Applications needs. This 4 button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of Applications. The Keypad 14 features a total of 4 buttons in Matrix form. This is a membrane keypad with no moving parts. A female 5 pin berg connector is