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.

Wednesday, May 13, 2009

Electronic Educational Applets - Paul Falstad

"These are some educational java applets I wrote to help visualize various concepts in math, physics, and engineering." - Paul Falstad - (now with HTML5 and Canvas)

Electronic Educational Applets - Paul Falstad
  • Math and Physics Applets - MyPhysicsLab - Physics Simulation with Java.
  • Index of Circuit Examples - Demonstrates various electronic circuits.
  • Digital Filters - Filters digital signals and plays the output on your speakers.
  • Acoustic Interference Applet - Audio interference between your speakers.
  • Waveguide Modes Applet - Electromagnetic waves in a waveguide.
  • Antenna Applet - Generates antenna radiation patterns.
Electronic Educational Applets - Paul Falstad

Analog Circuit Simulator Applet - Demonstrates various electronic circuits.

"This java applet is an electronic circuit simulator.  When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage.  The gray color indicates ground.  A red color indicates negative voltage.  The moving yellow dots indicate current."

iCircuit is the easy to use electronic circuit simulator and designer - the perfect tool for students, hobbyists, and engineers.

Its advanced simulation engine can handle both analog and digital circuits and features realtime always-on analysis. It is the perfect companion to students, hobbyists, and engineers.

Learn + Make + Teach Electronics at EveryCircuit

Build any circuit, tap play button, and watch dynamic voltage, current, and charge animations. This gives you insight into circuit operation like no equation does. While simulation is running, adjust circuit parameters with analog knob, and the circuit responds to your actions in real time.

    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

    Hobby DIY Garage