The LM339 is an LMx39x Series Voltage Comparator IC and is manufactured by many industries. The devices consist of four independent voltage comparators designed to operate from a single power supply. Operation with dual supplies is also possible as long as the difference between the two supplies is from 2V to 36V.

An Audio Power Amplifier LM386N.

MOC3021 Optocoupler

Printed Circuit Board FR04 with 7x10cm PCB copper coating. Laminated sheet of 1.5 mm.

An Integrated Circuit SN74LS109AN.

An Integrated Circuit SN74LS48N.

Socket 40 Pins

Converter SSOP28 to DIP28.

TEXAS INSTRUMENTS LM393AP

TIL111

This TLC555CP Integrated Circuit is a general-purpose operational amplifier that performs well.