We just have to make those BCD inputs High or Low according to the BCD code of that decimal number and we get the decimal number on display. We can be able to display a decimal number without using this chipset, but then we need 3 more pins and circuit will be complex, for saving pin we are using this IC. For example, for printing number “2” on 7-segment display we will give 0010 to the inputs (A,B,C,D) of IC4511, like wise we can print 0-9 decimal number on single 7-segment display. This CD4511 IC is basically a BCD to 7-Segment decoder/driver IC, using which you can convert a binary number into a decimal number on the 7-segment display. In this tutorial we are going to drive 7-segment display with IC 4511. There are many ICs available to drive a 7 Segment display like IC 4026, 4033 etc and we have covered driving 7-segment using 4026 and using 4033.
