74HC85 4-Bit Comparator IC (7485 IC) DIP-16 Package Buzzer and speakers RT-50B series can be used

RT-50B series can be used for many purposes with the best performance from it

of Pins 3 Mounting Type Surface Mount

It offers low THD+N

Recommended operating voltage: 3 ~ 12 VDC

These are Carbon Film Resistor with a value of 620 ohm 1/4W and tolerance of ±5%

74HC85 4-Bit Comparator IC (7485 IC) DIP-16 Package Buzzer and speakers RT-50B series can be used74HC series ICs are High speed logic gates with very low power consumption that utilize advanced silicon gate CMOS technology and 74HC85 is one of them. 74HC85 ICs contain a 4 bit Comparator that can compare two binary, BCD, or other monotonic codes and present the three possible magnitude results at the output i. e. A>B, A=B, and A<B. And its weighted inputs are A[0: 3] and B[0: 3] where A3 and B3 are MSB. 74HC85 comparator can work in both series