alarm system with password 2

[eaon21]

help po ulit tlga.... basic palang po kame at microcontrollers o any kind of programming is not allowed...help me to make a password circuit...a sort of sequential lock... 4 digit po na password...naisip q po ay magseset po aq ng fixed n password at icocompare q s password n iinput ng user..naghanap n po aq s web but it doesnt look like sequential tlg (i think, not sure), kasi mga nkikita q n circuit ay may given n 4 digit password which is set according to their configuration with the ic..my problem is panu kung ang password q ay 1234, tpoz inenter ng user ay 2314, dba parehong "on" un,plz help me to make a circuit that is really strict s sequence ng password, im going to use ordinary ic lang.... first po time po s digital design n course...

add me on ym..eaon21@yahoo.com

[glenj0y]

try mo ung 4bit comparator na 74xx series. i think it's 7486 or 7485. correct me if im wrong. :-)

[Redskin]

ano ba gagamitin mo nput numeric keypad ba o numbered switches?

[Redskin]

i giz numbered switches..