7490 Counter
Hi all ,
This is my 1st thread and I wanna everyone helps me with ...
I wanna draw a circuit of 24 Hour by using 7490 IC counter to produce suitable outputs for SECONDS, MINUTES & HOURS . Assuming 1 pulse per seond input is available .
Can any one helps me to draw this circuit ??
PLZ >>>PLZ>>>
I'm waiting >>>>>>>>>>>>>>>>>>>>
I'd use a micro personally, but heres a 'how to' with a 7490
http://electronics.howstuffworks.com/digital-clock5.htm
I've been in that website but it didn't help me alot >>>
I need more explanation ....
Look in this forum under TTL clock.
There are various circuits listed with schema's as well.
There are more ways to get to Rome.
Electricity, Electric clocks, Meters and Trains are great.
Please don't sent me private messages, I will not answer them.
The questions asked can be discussed in the open forums.
http://www.youtube.com/user/RODALCO2007 some interesting electrical stuff to watch.
This is a schematic of a secods display that I built for a clock. The rest of the clock consisted of a NTE2061 clock IC. I wanted a seperate seconds display. But since this is seconds the same circuit would work for minutes also. Since the NTE2061 is a PMOS the MPSA13 transistors were used as interface between it and TTL. The current limit resistors for the displays will have to be adjusted as my displays are 4 inch tall and use a 12V supply as the common anode.
The great thing about electronics is unlimited ways to do the job. The only limit is one\'s imagination. I generally think my way is best.
Show me a different way. I have an open mind.
Build a 1Hz crystal oscillator or a 2Hz oscillator and add a d flip-flop to reduce it to 1Hz.
I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.
Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.
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