Digital Circuits Tutorial : decimal number system, binary number system, base conversions, binary numbers representation, signed binary arithmetic, codes, error detection and correction codes, Boolean algebra, canonical and standard forms, k-map method, quine-mccluskey tabular method, logic gates, two level logic realization, combinational circuits, arithmetic circuits, decoders, encoders, multiplexers, de-multiplexers, programmable logic devices, threshold logic, sequential circuits, latches, flip flops, conversion of flip flops, shift registers, application of shift registers, counters, finite state machines, algorithmic state machine charts, ring counter, serial out, programmable read only memory, basic gates, simplification of Boolean functions, addition of two signed binary numbers.