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#1
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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. |
#2
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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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