RGB LED Light Fader

Step 3: Building the Circuit

I laid out the circuit, using Eagle software,  download a copy,  the lite version is free,  Sparkfun has a great tutorial on how to use the Eagle software.  

http://www.sparkfun.com/tutorials/108

Refer to the image of the Eagle Circuit of the finished RGB LED circuit.

Notice the pins on the ATTiny 2313,  we are using pin 20 for our voltage source of 5 volts coming from the USB cable (red lead)
We are using pin 10 for the ground source, the black lead on the USB cable.

Remember our resistor calculations, notice our 100 ohm and two 69 ohm resistor connections to the RGB LED.  

We are using the B port, pins 12, 13, and 14.  

Make sure that you double check these pins.  When we write the program we will be using the same port pins.

If you use different pins your program will not work.

It might be wise to build this circuit on a bread board in order to test out the circuit and program.

Once everything is working, then  transfer the circuit to a solder bread board and solder the components to the board for a more permanent installation.