Signal to increment the counts, this is provided by the below circuit which NOTE: This clock circuit will show 12:00 as 00:00 at midnight and also at noon. IC7), when the clock reads 12 the pin numbers 2 and 4 of IC6 and IC7 respectivelyīecomes HIGH and rest the IC1 and IC2 (4026s) to count “00”. The input for AND gate is provided by two IC 4017s (IC6 and The AND gate’s output goes HIGH when its two Three IC 4017 which are decade counters, it tracks the time and reset the ICĤ026’s count to “00” when the minute digit reaches 60.ĪND gate IC 7408 in this circuit which is used for resetting the hour digits to Of 4 seven segment display driver IC 4026 which can display 0 to 9 on commonĬathode 7 segment display, one IC controls one 7 segment display. ![]() We will be using only basic CMOS ICs and pure logic to build the circuit, yet this circuit can be easily replicated by beginners in electronics.Ĭircuit Diagram for 7 Segment Display Digital Clock:ĭownload high resolution image of the above circuit diagram: click here In this post we are going to build a 12 hour – 7 segment display digital clock without any microcontroller.
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