Okay, I have adjusted the LEDs and added the resistors (except for the Thanks for all of your help. This is my first attempt at developing a circuit. contrast on the LCD). I added the mosfet, but I was not sure where of the connects go to. Can you suggest a model number for the mosfet?
Because this was my first program to control the LCD, I was planning on using the full 8 channels instead of four. Is that a bad idea? I was also planning on using PMP to communicate with the LCD. Can I do that over 4 channels instead of 8?
If I use the LEDs in series then my power supply will need to be 25 * 3.7 = 92.5 V in size. Is there a better way so I do not need such a large power supply while still being able to control the LEDs via PWM over 4 channels?
My prototype will have large heatsinks and fans to keep the leds cool.