i have done this project which is crystal tester...range 4Mhz -24Mhz simply it verfies if crystal is actually giving out frequency as it is specified... and i choose to do the AND gate for more accuarcy . As it is opened trough the code frequency will flow in and it is counted for 1sec and it is closed again. the result will be displayed.
my problem is that i hav been questioned.. Why did you use 74HC08 and not 74LS08.. ???? the thing is that i tought it is high speed gate CMOS... can any one help me whats the difference between them and if it is better than using LS since this project is ready assembled and writeup is finished all i have to answer this in the next presentation! and he wants more explanation why i used CMOS
my problem is that i hav been questioned.. Why did you use 74HC08 and not 74LS08.. ???? the thing is that i tought it is high speed gate CMOS... can any one help me whats the difference between them and if it is better than using LS since this project is ready assembled and writeup is finished all i have to answer this in the next presentation! and he wants more explanation why i used CMOS