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Old September 15th 04, 12:18 AM
Benny
 
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Default Inviting Entries to Electronic Design Contest to win cash $100

Objective: The purpose of the Electronic Design Contest is to promote
excellence in the design of electronic systems and help the company to
improve circuit design quality by providing competition between
graduate and undergraduate students at universities and colleges.

Award: The 1st winner will be grant $100, and the 2nd winner will be
grant 10% discount coupon.

Problem: Design DC. motor speed control circuit that is used to
control the speed of direct current. Click here for more information
(Please don't copy the design from a link.)

Criteria: Submissions are made electronically via the TechnologyKit.us
web site. Electronic Design Diagram must be drawn in Microsoft Visio
file format. The deadline for submission is October 30, 2004

Check out on www.TechnologyKit.us for more information.
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Old September 15th 04, 05:45 PM
Dave
 
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Problem: Design DC. motor speed control circuit that is used to
control the speed of direct current.


Control the SPEED of direct current??? Other than using wire of
different velocity factor or doping the conductor, I cannot think of
many ways you can do this! You can certainly make the motor
speed change (what's new with that idea?? PWM has been around
for half a century or more...), but ya'll ain't gonna do much about
the speed of electrons in a wire to any meaningful degree. And why
would you want to?? Electrons seem to work just fine at the speeds
they achieve in wire - so why not just leave them alone?

Dave


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