Digital and Logic Circuits Basics

Digital Logic :

Basic Digital Circuits

You can start learning digital circuits by learning the operation of logic gates, see an interactive gadget tutor Logic Gates.

Then you can test the basics with these tutor gadgets

• Digital BCD counter
• Astable 555 Timer
• LED Running lights

Some Digital circuits i have explained Digital_Circuits - Mixed_Circuits.

Digital FAQ :

Dynamic Digital Tutors - 555 simulator

Usage of Schmitt trigger NAND Gates - I have a question about your Long Duration Timer circuit

Printer Sharing Without LAN - I am from Techno India college

Fuzzy Logic Links - please if you have some materials on Fuzzy logic control

Presettable Up-Down counter-timer - I am looking for a schematic for pre settable Up/Down counter

Seven Segment LED display - how is the circuit for driving a seven segment led

Timers and Counters :

Digital Timers, Counters and Clocks

Timers and Counters along with Analog Process Controllers formed the front end of Industrial Automation. Even today automation systems and control panels use analog timers and electromechanical counters. These are Indispensable. Analog + Digital combination controllers came next which were little bigger and offered better stability. They had thumbwheel switches as user interface in place of potentiometers.

uP based Systems with chips like 8085 came after that, they consumed more power and were big in size. The coming of Cmos uC like 80C31 made Process Instrumentation Small and SMD made even 48 X 48 DIN sizes possible. Now Analog and uC based designs are used in different applications. Digital Hybrids and uP instruments are not used as they were Transient-Technology Methods.