Psycho_Raptor
New Member
Hi guys, I was wondering if anyone could help me with a project I was planning on trying. I've had a look in some threads and I think some of the ways described could work for me...but so far all I know about electronics is from doing a gcse and AS level course, and what I do know is confined to very specific ways. So I'm hoping I can do this using parts I'm familiar with even if it's a roundabout way of working.
Right the project; I want to build a circuit that will count down and display the numbers on 3 seven segment displays. The only way I know how to count down is by using D-type flip-flops connected together, but I'm not sure how to set the number they count down from, can it be done by "entering" the number you want using the set pins? The largest number I would want to count down from would be 300, so I think I would need 9 D-types. The part I'm not sure about is using these to drive a seven segment display, we have been told about a 4511 IC although I think this can only drive one display and I can't figure out how to connect them together. I don't think connecting several D-types to each 4511 will work? This seems a lot more complicated than it needs to be but if I don't want to get confused with new parts.
Thanks for any help.
Right the project; I want to build a circuit that will count down and display the numbers on 3 seven segment displays. The only way I know how to count down is by using D-type flip-flops connected together, but I'm not sure how to set the number they count down from, can it be done by "entering" the number you want using the set pins? The largest number I would want to count down from would be 300, so I think I would need 9 D-types. The part I'm not sure about is using these to drive a seven segment display, we have been told about a 4511 IC although I think this can only drive one display and I can't figure out how to connect them together. I don't think connecting several D-types to each 4511 will work? This seems a lot more complicated than it needs to be but if I don't want to get confused with new parts.
Thanks for any help.
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