74HC47 ( BCD to 7-Segment Decoder) RFID 13.5 Mhz 74HC1457 is a quad 2-input

74HC1457 is a quad 2-input multiplexer

Non-linearity: ±3%

DC solenoid electronmagnet

however you can load different firmwares to make your own applicaiton on the modules' memory and processor

The fork-shaped probe with two exposed conductors

74HC47 ( BCD to 7-Segment Decoder) RFID 13.5 Mhz 74HC1457 is a quad 2-inputIntroduction : 74HC47 is a BCD to 7 segment latch decoder driver with four address inputs (A, B, C, D), a latch enable input (LE), a ripple blanking input (BI), a lamp test input (LT), and seven segment outputs (a to g). When LE is LOW, the state of the segment outputs (a to g) is determined by the data on A to D. When LE goes HIGH, the last data present on A to D are stored in the latches and the segment outputs remain stable. When LT is LOW, all the