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Comments on: Solar panel and motor: Any way to regulate the power transmission? http://www.xfsolarpanels.com/blog/solar-panel/solar-panel-and-motor-any-way-to-regulate-the-power-transmission 'Cause Not Paying For Energy Is Fun! Fri, 10 Feb 2012 14:44:43 +0000 http://wordpress.org/?v=2.7 hourly 1 By: Chris P http://www.xfsolarpanels.com/blog/solar-panel/solar-panel-and-motor-any-way-to-regulate-the-power-transmission/comment-page-1#comment-5105 Chris P Mon, 28 Dec 2009 22:38:59 +0000 http://www.xfsolarpanels.com/blog/solar-panel/solar-panel-and-motor-any-way-to-regulate-the-power-transmission#comment-5105 I assume it is a DC motor. You should have DC voltage coming out of the solar cell (For example 10V). You could use a transistor to switch the voltage on and off, then filter the output with an RC filter. You will have to choose the right RC time constant . It will have to be slower than the control pulse frequency, but faster than the desired motor response time. If you switched the voltage with a 50% duty cycle, then filtered the output, you would get 5V, with a 75% duty cycle, you would get 7.5V, etc. Therefore, you could control the motor by controlling the duty cycle of the switching. A microcontroller like the BASIC Stamp can produce the control pulses.<br><b>References : </b><br> I assume it is a DC motor. You should have DC voltage coming out of the solar cell (For example 10V). You could use a transistor to switch the voltage on and off, then filter the output with an RC filter. You will have to choose the right RC time constant . It will have to be slower than the control pulse frequency, but faster than the desired motor response time.

If you switched the voltage with a 50% duty cycle, then filtered the output, you would get 5V, with a 75% duty cycle, you would get 7.5V, etc. Therefore, you could control the motor by controlling the duty cycle of the switching. A microcontroller like the BASIC Stamp can produce the control pulses.
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