ICs
MAX7219 – 8-Digit LED Display Driver IC
The MAX7219 is an IC designed to control a 8x8 LED MATRIX.
74HC157 – 2-Input Multiplexer IC
74HC157 Pin Configuration
Pin Number
Pin Name
Description
2,5,11,14
74LS90 BCD Counter IC
74LS90 Pin Configuration
Pin No.
Pin Name
Description
1
CLKB
74HCT04 Hex Inverter IC
74HCT04 Pin Configuration
Pin Number
Pin Name
Description
1,3,5,11,13,15
LM7905 Voltage Regulator
LM7905 Pin Description
Pin Number
Pin Name
Description
1
LF351 Op-Amp IC
LF351 Pin Configuration
Pin No.
Pin Name
Description
1.
Offset Null 1
DS1302 RTC Chip
DS1302 Pin Configuration
Pin No.
Pin Name
Description
1
Vcc2
74HC245 8-bit Transceiver IC
74HC245 Pin Configuration
Pin Number
Pin Name
Description
1
PC817 Photo-Coupler IC
PC817 Pin Configuration
Pin Number
Pin Name
Description
1
Anode