YKk Posted February 12, 2007 Report Share Posted February 12, 2007 hiI am just a novice in electronics. I like to make a electronic device just have to count 1-9 in 7-segment LEDI use 7447 to connect the LED and 7490 as counterbut come out just all LED lights.anyone can me how to make a counter circuit? Quote Link to comment Share on other sites More sharing options...
Fowkc Posted February 13, 2007 Report Share Posted February 13, 2007 Those are the ICs you need, so it's just a matter of wiring them up correctly:http://www.aaroncake.net/circuits/counter.htmMake sure your seven segment display is a common anode type if you're using this circuit. If not, either find a common anode type, or swap the 7447 for a 4511 Quote Link to comment Share on other sites More sharing options...
allvol Posted February 21, 2007 Report Share Posted February 21, 2007 What are you using to pulse the 7490? You can manually count with a push-button wired bounceless, or you can use a 555 timer for continuous counting. Quote Link to comment Share on other sites More sharing options...
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