4026 Decade Counter

In this circuit, a 4026 IC used to drive a 7 segment led display (SM42056). The counting process is manually triggered by a tactile switch. What is great about 4026 16-pin CMOS is its output is suitable for direct connection to 7-segment LEDs. The simple manual trigger circuit uses a 6V power supply. A number of 330 ohm resistors are used as current limiting resistor. Pin 2 (Clock Inhibit), 8 (VSS), and 15 (Reset) are connected to the negative terminal of battery. Positive voltage is applied to pin 3 (Display Enable) and 16 (VDD). Pin 1 (Clock) is used to start the counting (1 push = 1 count). Pin 6, 7, 9, 10, 11, 12, and 13 are connected to the 7-segment.