Seven-7-Segment Counter Circuit with LED Display-Diagram Nov 08, 2018Here is the circuit diagram of a seven segment counter based on the counter IC CD 4033. This circuit can be used in conjunction with various circuits where a counter to display the progressÂ adds some more attraction. In this circuit a 7-segment display is connected with two NE555 IC’s and CD4033 IC to display counts from 0 to 9. The IC CD40333 is a 5 stage Johnson decade BCD to 7 Segment LED Display Decoder Circuit Diagram and Jul 06, 2015A common cathode 7 segment display consists of 8 pins – 7 input pins labeled from ‘a’ to ‘g’ and 8 th pin as common ground pin. Back to top. 7 Segment Display Decoder Circuit Design. Step 1: The first step of the design involves analysis of the common cathode 7-segment display. A 7-segment display consists of an arrangement of LEDs in an ‘H’ form.