Implementing Ripple Blanking With A CD4511

[napoleansolo]

Hi

Can someone please tell me how I would implement ripple blanking with a CD4511?
I want all digits except the least significant digit to be blank if the value is zero. I tried
feeding the A, B, C and D inputs of the CD4511 into a CD4072 and the out of that into
pin 4 of the CD4511, rather than having pin 4 permanently set high. This did not work
as it looked like the timing was not right.

Thank you

 

[BradtheRad]

4511 blanking pin only affects that chip.
A comprehensive circuit of some kind is needed which examines every numeral, starting from the left.
If it's zero (ABDC are zero), then blank the digit (enable BL). Go on to the numeral to the right and repeat. As soon as it detects a non-zero numeral, enter a different routine that disables BL for that digit and all digits to the right.

 

[KlausST]

Hi,

please post your existing circuit´s schematic.
Hand drawn is, OK, but it should be complete.

Klaus