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Counter Circuit???

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cool4uall

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Hey Guyz, I need to make a system that counts object as they are passed on passing belt. I have a IR Source and IR detector and then I need a counter which counts and connect to it. Can someone help me with this one?. Its urgent and a school preject.Thanks.
 
MC14553B is not available anywhere. Is there any equivalent counter for that? I tried on Google, I don't get anything. Can you help me out? Thanks.

btw What about 4-digit counter instead of 3-digit?
 
You could use the 74c926 counter from Fairchild. It's a 4-digit multiplexed counter chip which uses common-cathode led displays. You can cascade the '926 if you need more than 4 digits. It's still in production and available from Digikey, Jameco, Mouser, etc.
Here's a data sheet link: https://www.fairchildsemi.com/ds/MM/MM74C926.pdf
The cheapest I found was Digikey at about $11US ea.
JB
 
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