Apache HTTPD RewriteMap

Apache HTTPD RewriteMap

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Uploaded on Feb 20, 2012

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Basic DC Fan Speed Circuit

Basic DC Fan Speed Circuit

A simple Darlington Transistor circuit for controlling the speed of a DC Brushless fan (12 volts). Requires a PWM (Pulse Width Modulation) input. I use and Arduino UNO for this PWM input but any Microprocessor can be used. You can even use a 555 or 556 timer circuit.

For the sake of this simple circuit the Darlington Transistor TIP120 can be thought of as a MOSFET transistor.

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Uploaded on Feb 19, 2012

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DC Fan Speed Circuit Breadboard

DC Fan Speed Circuit Breadboard

Basic layout of the DC Fan Speed control circuit on a small breadboard.

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Uploaded on Feb 19, 2012

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Overview of Complete Project - DC Fan Speed Circuit

Overview of Complete Project - DC Fan Speed Circuit

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Uploaded on Feb 19, 2012

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The DC Brushless Fan (12V) for the DC Fan Speed Control Circuit

The DC Brushless Fan (12V) for the DC Fan Speed Control Circuit

Note the shiny fan blade as about 9 oclock. This is a piece of metallic tape on one blade. This makes noticing the fan speeding up and slowing down much easier.

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Uploaded on Feb 19, 2012

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