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Electronic Theory

Relays & Ladder Logic for NOOBs 

by strantor Published on 10th May 2012 05:57 AM     Number of Views: 223 
This attempt at an instructional thread is in response to several experiences I've had trying to convey relay circuits to ...

PIC 16F and Register Banking Explained 

by Jon Wilder Published on 25th March 2012 09:29 AM     Number of Views: 1121 
PIC 16F And iRAM Banking

By Jon Wilder

As some of you have noticed, the internal RAM in the ...

The Basics of Bypass Capacitors 

by ElectroMaster Published on 27th January 2012 03:44 AM     Number of Views: 2771 
This article will explain the function of a bypass capacitor, when its appropriate to use them, and what values you should consider using. ...

Introduction to Pulse Width Modulation 

by ElectroMaster Published on 26th January 2012 01:21 PM     Number of Views: 2060 
A look at a powerful technique for controlling analog circuits with a microprocessor's digital outputs. ...

Amplifier Theory Tutorial (work in progress) 

by unclejed613 Published on 30th December 2011 03:07 AM     Number of Views: 2833 
New Article (work in progress)
AMPLIFIER THEORY TUTORIAL

No matter how "digital" things ...

Common Resistor and Capacitor Values 

by ElectroMaster Published on 18th December 2011 11:38 AM     Number of Views: 2597 
To manufacture resistors (or other components like capacitors) of every possible value would be impractical, instead they are made in a range of ‘Common Values’. The standard was created by Electronic ...

Pull Up and Pull Down Resistor Tutorial 

by ericgibbs Published on 18th December 2011 08:15 AM     Number of Views: 2430 
The Basic use of a pull-up or pull-down resistor is to prevent a 'floating' input to a digital circuit.
...

Determine Voltage Drop Across Resistors 

by AtomSoft Published on 14th July 2011 01:35 PM     Number of Views: 2596 
How to calculate voltage drop across series resistors.

Step 1

Determine current of total resistors ...

The 555 Timer 

by ElectroMaster Published on 3rd July 2011 05:17 AM     Number of Views: 5092 
The 555 timer is capable of producing accurate timing ranges from microseconds to hours and therefore has many practical uses for every level of electronics. It is an especially good integrated circuit for electronic hobbyists to learn with. I will guide you through the basics and will also show you an example circuit.

Some features:
  • Operates on a range of supply voltages
  • Timing from micro seconds to hours.
  • Monostable and astable operation
  • Adjustable duty cycle
  • High output
...

The 4017 Decade Counter 

by ElectroMaster Published on 26th June 2011 03:29 AM     Number of Views: 3870 
This handy Decade Counter (or sometimes called a Johnson Counter) can be used in many circuits, I will guide you through the basics and show you an example circuit.
...

How To: Test A Uni Junction Transistor 

by 3lectrix Published on 16th June 2011 09:49 AM     Number of Views: 2539 
You can easily test the health of a UJT (Uni junction transistor) by using a digital multimeter. Doing these 3 tests will ...

DIY printed circuit boards My experiments and mistakes. 

by MrDEB Published on 22nd April 2011 09:43 PM
New ArticleDIY Printed Circuit Boards
for the home hobbyist
methods and mistakes
By Doug Bezaire ...

Breadboards - How bad are they at RF? 

by JimB Published on 11th July 2010 04:52 AM     Number of Views: 4681 
Over the years many threads have revolved around the poor operation of a circuit built on a breadboard, the type with lots ...

Eagle Schematic Tutorial 

by Mikebits Published on 10th July 2010 07:03 AM     Number of Views: 5589 
I wrote up a Eagle tutorial for another user on this forum, but I thought, what the heck someone else might find it useful ...

Ohm's Law for Beginners (or The Amp-Hour Fallacy) 

by bychon Published on 3rd May 2010 02:32 AM     Number of Views: 7922 
Just about once a day, somebody writes in with, “My boom box has a dead battery that says 12 volts, 1.8 amp-hours. The new battery says 12 volts, 2.4 amp-hours. Will the extra amp hours burn up my radio?”
...

Capacitor ESR Meter 

by Menticol Published on 12th April 2010 06:05 PM     Number of Views: 5467 
What is ESR and How Can It be Tested?

As the allmighty Samuel M. Goldwasser says, "ESR (Equivalent ...

Cheap ARM Starting Kit 

by DirtyLude Published on 26th January 2010 05:05 PM
I agree, that it's still complicated to get started with, but ARM7 until recently was the lowest chip core in the family ...

Method to Make Project Panels (Warning: Detailed Info!) 

by crashsite Published on 5th January 2010 05:53 AM
When laser printers first came into coomon use (in the workplace anyway), here's a technique I came up with to make fairly ...

UNIT Committment solution using Dynamic programming 

by arijit18 Published on 5th January 2010 12:12 AM
INTRODUCTION

The unit commitment is an optimization problem that economically schedules generating units ...

LED Switching Regulator 

by Hero999 Published on 4th January 2010 04:58 AM
I was bored at work and had an idea so I started playing around in LTSpice and came up with this circuit to power a couple ...

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