Free or affordable online Electrical Engineering - Direct Current courses, how-to articles, tutorials, tips, tools, books, degree information and resources.

Bookmark this site

Master Course List

Online Tests

Courses & Tutorials

Building Design

  ADA Compliance

  Coastal Construction

  Indoor Air Quality

  Mold Remediation

Civil Engineers






Electrical Engineers

  Circuit Analysis

  Direct Current

  Electrical Safety


  Power Distribution

Industrial Engineers

  Quality Systems




Mechanical Engineers

  Heat Transfer


  Piping Systems

  Steam Systems


  Safety & Security

Petroleum Engineers

  Gas & Oil Extraction



Renewable Energy

  Alternative Fuels


  Wind Energy

Privacy Statement

Our Other Sites:


All Topics  >  Engineering  >  Electrical Engineering - Direct Current



POWER - Free Subscription
Published since 1882 and read by managers and engineers, POWER is the oldest and most trusted source of information in the energy industry. Coverage includes boilers and combustion systems, environmental management; instrumentation, controls, computers, and software; information technologies; natural gas, oil, coal, and renewable fuels; nuclear power; pumps, compressors, valves, and piping; turbines, engines, and generators; water treatment.


Building a DC Power Supply

This device is commonly used for doing electrophoresis. Commercially available units that provide the necessary 120VDC usually cost $1,200 or more. The following one costs less than $20.


Affordable Online Courses

Electrical Engineering Awareness and Terminology Certification - $9.99 The Electrical Engineering Awareness and Terminology Certification has been developed to assess important concepts, skills and terminology related to Electrical Engineering.

DC Power Supplies:  Fundamental Concepts
This course introduces the student to the purpose, function, and elements of the ubiquitous DC (direct current) power supply. Modern electronic devices generally require low-voltage DC sources to power their circuits. Some devices use battery or even solar power, but all others need a DC power supply, typically connected to a house or office AC (alternating current) wall outlet. These include radios, stereo systems, TV, computers, and other devices which we use daily. - 2 PDH


Direct current

Direct current (DC or "continuous current") is the continuous flow of electric charge through a conductor such as a wire from high to low potential. In direct current, the electric charges flow always in the same direction, which distinguishes it from alternating current (AC).



Direct Current (DC) Electricity

Direct current or DC electricity is the continuous movement of electrons from an area of negative (-) charges to an area of positive (+) charges through a conducting material such as a metal wire. Whereas static electricity sparks consist of the sudden movement of electrons from a negative to positive surface, DC electricity is the continuous movement of the electrons through a wire.


Earn your PDH online in the convenience of your own home or office using


Site Map    FAQs    Link to Us    Educational Gift Ideas    Contact Us

2012 Learning Link Finders, Inc. - All Rights Reserved - Modified on 05/08/12

All trademarks and registered trademarks appearing on the website are the property of their respective owners.
By providing links to other sites, Learning Link Finders, Inc. does not guarantee, approve or endorse the information or products available
at these sites, nor does a link indicate any association with or endorsement by the linked site to