24 Second Shot Clock

24 Second Shot Clock

This is a countdown timer circuit starting from 24 similar to the basketball shot clock. It will count from 24 down to 0 every second.

Keypad

Keypad

This logic circuit shows a keypad having 10 keys representing the numbers from 0 to 9. The input will be stored using the latching method. The input in decimal will be converted to binary numbers and will be displayed as decimals again.

Up-Down Counter

Up-Down Counter

This type of circuit is a counter that changes its state in either direction depending on the control input. It counts from 0-9 if counting up and 9-0 if counting down.

Full Adder

Full Adder

Full adders are are digital circuits that adds binary numbers taking to account the numbers carried in and carried out. Full adders already have ready made ICs but here in this circuit we will construct the full adder using only logic gates. We will perform addition and subtraction of 4-bit binary numbers.

555 Timer

555 Timer

The 555 timer is used as a timer, pulse generator and oscillator, etc. The 555 timer has 3 modes, namely, monostable, astable and bistable modes. Each have different usage and effects on the 555 timer. Here in this example, we will use the 555 timer in astable mode making use of it as an oscillator.

Seven Segment Display

Seven Segment Display

Here in this logic circuit, we will operate and display one digit numbers in a seven segment display using only the basic logic gates.

Water Level System

Water Level System

This type of system is used to indicate different levels of a certain type of scenario. As an example, we will relate this to a water level system to monitor the level or amount of water just like in dams.