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Sunday, May 17, 2009

Revealing the Ideas behind Circuits

Electronic circuitry is more art than science. Inventing novel electronic circuits is a result of human fantasy, imagination and enthusiasm.

Revealing the Ideas behind Circuits

We treat electronic circuitry not only as a science, but also as an art. Inventing novel electronic circuits is a result of human fantasy, imagination and enthusiasm.

Practical Electronics

Fortunately, abstract electronic circuits are based on clear and simple ideas, which we may derive from our human routine. In order to really understand how circuits operate, we have first to reveal the basic ideas on which they are grounded..."

This book is part of a series on Electric Circuits:

Practical Electronics

The aim of this book is to teach you simple analogue and digital electronics at a practical level. For the in-depth theory of electronics, please read the Electronics Textbook. By the end of this book, you should be able to combine circuit elements to create more complex circuits, and have an understanding of how it works.

Friday, May 08, 2009

Analog Mux for Data Acquisition Systems

Here is a 4-20 mA In/Out Analog Mux with Cascade option. This is a simple circuit i designed to make a Automation System within a budget.


Analog Mux using 4051

This takes 4-20mA from many Transmitters and gives out just one 4-20 mA output. The Mux is done with a digital byte or word. This is a slow scanner as process is slow, that way many analog inputs can be multiplexed and sent into one analog input of a D/A. In near real time systems a faster mux could be used or mux totally avoided. This was made in some numbers, so the pcb is better than others.

4-20mA Multiplexer Circuit - pdf