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ICs

74HC157 – 2-Input Multiplexer IC

Pin Configuration Pin Number Pin Name Description 2,5,11,14 Input A

74LS90 BCD Counter IC

Pin Configuration Pin No. Pin Name Description 1 CLKB

74HCT04 Hex Inverter IC

Pin Configuration Pin Number Pin Name Description 1,3,5,11,13,15

LM7905 Voltage Regulator

Pin Description Pin Number Pin Name Description 1 Ground (Gnd)

LF351 Op-Amp IC

Pin Configuration Pin No. Pin Name Description 1. Offset Null 1

DS1302 RTC Chip

Pin Configuration Pin No. Pin Name Description 1 Vcc2

74HC245 8-bit Transceiver IC

Pin Configuration Pin Number Pin Name Description 1

PC817 Photo-Coupler IC

PC817 Pin Configuration Pin Number Pin Name Description 1 Anode

ICL7107 ADC with Display Driver

Pin Configuration Pin Number Pin Name Description 1 Supply voltage (+)

MC74HC73A Dual JK Flip-Flop

Pin Configuration Pin Number Pin Name Description 4 Vcc