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RFID Card 125khz( EM4100 ) is one of the most popular models in the proposed range of read-only proximity cards
These inputs allow the first stage to perform as aJ-Kor TOGGLE flip flop as shown in the truth table
The output of the sensor is analog voltage
I2C Serial Interface
74HC30D (8-Input NAND Gate) force RFID Card 125khz( EM4100 )Introduction : 74HC30 is an 8 input NAND gate. Inputs include clamp diodes. This enables theuse of current limiting resistors to interface inputs to voltages in excess of VCC. Features : Logic Type: (8 Input NAND Gate, Supply Voltage Range: 2V to 6V. High noise immunity. Logic Case Style: DIP. No. of Pins: 16. Operating Temperature Range: 40C to +125C.