# Will this RGB LED manual color changer circuit work?

I am working on making a lighted banjo head, and thought to use an RGB LED strip (http://www.sparkfun.com/products/10259) so i can change the colors. I am new to electronics, and have no real programming experience. As such I designed this curcuit to work with basic parts i can find easily at hobby stores.

I reasoned that if i increased the resistance of the circuit with a potentiometer, I could dim the LED's. The led strip takes 0.02 amps at 12 volts and is common anode (it has built in resistors for each LED). I cant find low resistance potentiometers so i thought to put 5k ohm pot in parallel with 680 ohm resistor to get the required resistance of 600 ohms to shut off the LED.

I have looked around the internet and haven't seen anyone use this method, so im wondering if it will work. Any help is appreciated as i hope to make an instructable of this project!

Thanks,

Pie

Here is a circuit diagram:

I reasoned that if i increased the resistance of the circuit with a potentiometer, I could dim the LED's. The led strip takes 0.02 amps at 12 volts and is common anode (it has built in resistors for each LED). I cant find low resistance potentiometers so i thought to put 5k ohm pot in parallel with 680 ohm resistor to get the required resistance of 600 ohms to shut off the LED.

I have looked around the internet and haven't seen anyone use this method, so im wondering if it will work. Any help is appreciated as i hope to make an instructable of this project!

Thanks,

Pie

Here is a circuit diagram:

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Sorry if i am misinterpreting this, and thanks so much for the help,

Pie

And if it's common-anode swap the 12V +/-

L

It's the same as before, what interests you in doing it that way*?

L

*

I have looked around the internet and haven't seen anyone use this methodWhile i see the general function of the circuit you drew the complete reasoning escapes me. my goal is to learn "why" so i can use the same principals in the future.

The change in this drawing is that I drew it with the potentiometers wired properly as rheostats instead of as standard resistors.

Thanks again for the help and sorry for taking so much of your time,

Pie

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Best,

Pie

You'll need 3 copies.

Steve