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abdullah_danish
New Member

Pakistan
2 Posts

Posted - Oct 27 2008 :  1:21:47 PM  Show Profile  Send abdullah_danish an AOL message  Click to see abdullah_danish's MSN Messenger address  Send abdullah_danish a Yahoo! Message  Reply with Quote
hi plz can any one tell me wht to do with mod 16 counter so tht the led glows for hexa number but not for decimal number plz help me

pebe
Nobel Prize Winner

United Kingdom
1078 Posts

Posted - Oct 27 2008 :  1:45:44 PM  Show Profile  Reply with Quote
Can you give us a circuit?
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mrgone
Nobel Prize Winner

USA
1176 Posts

Posted - Oct 28 2008 :  9:50:47 PM  Show Profile  Reply with Quote
You use an "AND" gate. Tie the two inputs to Qa & Qc and the output back to clear on the counter.

So when it tries to go to decimal "10" which is binary "1010" the two "1s" give a "true" output on the AND gate which activates the clear. If it is active "low" clear then you will need an inverter between the AND and the "Clear".

Wait, which is the MSB (Most Significant Bit)? I don't remember without looking at a data sheet. You might have to use Qb & Qd. You understand what I'm saying.....right?

Edited by - mrgone on Oct 28 2008 9:58:37 PM
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abdullah_danish
New Member

Pakistan
2 Posts

Posted - Oct 31 2008 :  09:49:52 AM  Show Profile  Send abdullah_danish an AOL message  Click to see abdullah_danish's MSN Messenger address  Send abdullah_danish a Yahoo! Message  Reply with Quote
hi i really appreciate yur help ...can u mail me mod 16 counter circuit diagram using 7493 ic ..
on abdanish@hotmail.com .
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