I am in internship, my mission is to build a generator, I need to preset the binary counter cd4516.
I know how to make it count from any value. But I don't know how I can stop it at any value !!!???.
hi,
You said you know how to preload the 4516 to a count of 4.??
Look at this clip from the datasheet of the 4516, you know its a Binary counter, so which Qn output pins will add up to Decimal 10.?
E
I didn't quite understand your question.
yes I know how to preset the counter to start for example at 4, i. e. I receive a count from 4 to 15 (4 5 6 ... 15) at the output
I want me to stop at 10. I thought about adding a NAND but I don't know if I'm in the right direction
hi,
OK.
Look at this image of the 4516 Qn outputs as it counts, I have highlighted the Decimal 10 count, which Q outputs are Logic High and which are logic Low for the 10 counts.
When you know which Q's are High and Low for 10, then we can look at AND/NAND gates.
E
OK,
You would use the NAND gate output into another gate which has the clock on one input and the NAND gate output gate on the other, this would stop it counting.
So when the count gets to 10 and it stops counting, what do you want to happen next.?
my goal is to vary the frequency with a specific step. to do this I need this counter to preset cd4059 to have N=034, 134, ..., ..., 1034.
when it stops counting, I switch to another frequency range. That's all to do EMC tests.