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Lion_Heart
Joined: 30 Dec 2006
Posts: 2
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 Posted:
Sat Dec 30, 2006 4:56 pm Post subject:
Designing 24 Hour clock |
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Hi there ,
I'm trying to design a circuit of 24 Hour clock using the 7490 IC counter to produce suitable outputs for SECONDS , MINUTES & HOURS. Considering ONE Pulse per second input available.
Would you please help me to design this circuit ??? 
I'm waiting guys , so don't let me to wait so long 
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neon
Joined: 25 Feb 2006
Posts: 594
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Mon Jan 01, 2007 6:17 pm Post subject:
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| Unconsidering one pulse per second. U better consider the clock first then consider buying it . China makes those things battery operated for a dollar. As a hoby go for it but it is inpractical 7490 try at least CMOS. |
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Lion_Heart
Joined: 30 Dec 2006
Posts: 2
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Mon Jan 01, 2007 11:35 pm Post subject:
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I don't wanna buy ... I wanna a DESIGN ..
ELECTRONIC CIRCUIT !! This is what I want
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neon
Joined: 25 Feb 2006
Posts: 594
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Mon Jan 01, 2007 11:55 pm Post subject:
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| then go for it. but in case you haven' t check current events you don't pick the counter before you pick your application. how are u going to count grey code i imagine. good luck. |
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Retiredguy
Joined: 13 Nov 2006
Posts: 8
Location: Kent, OH
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Fri Jan 05, 2007 3:43 pm Post subject:
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I would suggest using a 7492 for the tens of both the seconds and minutes. these counters can count to six ( 0 thru 5 ) when only the first three outputs are used. This would simplify your design greatly.
_________________
Retired Guy |
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neon
Joined: 25 Feb 2006
Posts: 594
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Wed Jan 17, 2007 8:43 pm Post subject:
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| retired guy you told him the secret of counting. he thought that minutes comes in hundreds. Good for you. |
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