Versatile RGB LED PWM Driver

Step 17Connecting LED modules to the driver

Connecting LED modules to the driver
DC in should be in the range 9 to 24 volts. It should also be able to supply the current requirements of all three output channels. This will depend on the type of LEDs used so we can't specify any particular power source.

Maximum output per channel is 5 amps for a total of 15 amps. Connecting cables should also be rated for the current they will be carrying. Although the driver can handle up to 15 amps, it is perfectly happy to drive a few 5mm LEDs at 30mA, as we say it is a versatile driver.

LED arrays, modules etc should have their negative or cathode terminals connected to the MOSFET outputs and the positive or anode connection to the common terminal as shown below.

Depending on the type of LED used you may need to include a current limiting resistors. Some modules have these built in, refer to the manufacturers information for the specific LEDs you plan to use.

A very good 'free' web based tool that will design arrays of LEDs for you, check out this site. http://led.linear1.org/led.wiz

The board can drive a huge range of LED types, even single 5mm LED as the picture here shows.

If you want more information on other RGB LED projects don't forget to check out the PICPROJECTS web site http://picprojects.org.uk/projects/picprojects.htm
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1 comment
Jan 26, 2010. 9:46 AMjaapiyo says:
Nice Instructable but why is switch 2 not in use?
Thanx, Jaap

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