About Digital Logic

Book 1 - Fundamentals of Digital Logic with VHDL Design

2008-10-10T08:01:00.001-07:00

Fundamentals of Digital Logic With VHDL Design teaches the basic design techniques for logic circuits.
It emphasizes the synthesis of circuits and explains how circuits are implemented in real chips.
Fundamental concepts are illustrated by using small examples, which are easy to understand.
Then, a modular approach is used to show how larger circuits are designed.
VHDL is used to demonstrate how the basic building blocks and larger systems are defined in a hardware description language, producing designs that can be implemented with modern CAD tools.

Details can be found HERE

2008-10-10T07:52:00.000-07:00

The 74HC/HCT08 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL).
They are specified in compliance with JEDEC standard no. 7A.
The 74HC/HCT08 provide the 2-input AND function.

Details can be found HERE

2008-10-10T03:26:00.000-07:00

LogicWorks is an integrated schematic editor/logic circuit simulator.
LogicWorks is sold, with complete documentation, by Addison-Wesleyits resellers, including Computer Literacy Bookshops.
Libraries available for LogicWorks include the 7400 device series, along with many others.

Details can be found HERE

2008-10-10T02:21:00.000-07:00

Various use of multiplexer with PLC has been introduced.
6 x digital channel and 1 x analog channel used by the PLC to make this multiplexer work.
In this example the analog inputs are 4 - 20mA none floating loops.
The 1 x analog output to the PLC is 2-10VDC.
74HC/HCT4067 is the 16ch analog multiplexer/demultiplexer circuit used in this example.

Details can be found HERE

2008-10-10T02:14:00.000-07:00

This is a Computer Assisted Learning application to support the first year Digital Logic module from the Electronic Engineering course.
Queries Every screen has a link which you can use to submit questions or comments about this tutorial package or the subject material.
In order to improve this tutorial package, It is best to ask questions when in doubt.
This helps the staff to determine the standard of both the students and the tutorial package.

Details can be found HERE

2008-10-10T01:54:00.000-07:00

Some of the best tutorial website on net.
Digital or binary logic has fascinated many people over the years.
The very idea that a two-valued number system can possibly be the basis for the most powerful and sophisticated computers seems astounding, to say the least.
Nevertheless, it is so, and the how and the why of this requires some explanation.

Details can be found HERE

2008-10-10T00:57:00.000-07:00

The assignment for this project was to produce a psuedo-random number sequence using D-type flipflops.
A 555 timer chip was used to produce the clock pulse, which was passed through an inverter before being sent to the 74194 D-flipflop, to reduce noise.

Details can be found HERE

2008-09-28T03:54:00.000-07:00

Truth table used in digital logic.
Specifically in connection with Boolean algebra, Boolean funtions and propositional calculus.
Truth table to compute the functional values of logical expressions on each of their functional arguments.
Simple basic concept and principal of truth table is to show the expression of 'true' and 'false' logic.

2008-09-28T02:59:00.000-07:00

This project decodes touch-tones and allow you to control external devices.
It will give 20 distinct outputs based on how the touch-tones are received.
The upper bank of outputs is activated by using the '*' key and the lower bank is activated by using the '#' key.
The '*' key might be considered as an ON.
The '#' key might be considered on OFF.
This would yield 10 pairs of commands or each output could be used independently to yield 20 outputs.
Use SSI202 decoder chip as the dtmf detector and decoder.
Use 74175 as latch to hold the selected number.
Use 7485 as comparator.
Good project for the learning of decoder concept and principal.

Further information go to the website DTMF Decoder

2008-09-21T19:31:00.001-07:00